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Advantages and Disadvantages</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/selective-laser-sintering-advantages-and-disadvantages/">Selective Laser Sintering  &#8211; Advantages and Disadvantages</a></p></header><div class="excerpt"><p>What is Selective Laser Sintering - Advantages and Disadvantages
Introduction to Selective Laser Sintering :   Additive manufacturing, or 3D printing, is the process of turning digital designs...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/selective-laser-sintering-advantages-and-disadvantages/" aria-label="View Post: Selective Laser Sintering  &#8211; Advantages and Disadvantages">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Selective Laser Sintering  &#8211; Advantages and Disadvantages","url":"\/\/www.gunkrazy.com\/selective-laser-sintering-advantages-and-disadvantages\/","articleBody":"What is Selective Laser Sintering - Advantages and Disadvantages\r\nIntroduction to Selective Laser Sintering :\u00a0\r\n\r\nAdditive manufacturing, or 3D printing, is the process of turning digital designs into three-dimensional objects. It is a convenient and affordable way to make prototypes as well as finished products, making it popular with businesses, hobbyists and inventors.\r\n\r\nOne of the technologies used by today's 3D printers is called selective laser sintering (SLS). During SLS, tiny particles of plastic, ceramic or glass are fused together by heat from a high-power laser to form a solid, three-dimensional object.\r\n\r\nThe SLS process was developed and patented in the 1980s by Carl Deckard \u2014 then an undergraduate student at the University of Texas \u2014 and his mechanical engineering professor, Joe Beaman.\r\n\r\nSelective laser sintering (SLS) is an additive manufacturing (AM) technique that uses a laser as the power source to sinter powdered material (typically metal), aiming the laser automatically at points in space defined by a 3D model, binding the material together to create a solid structure. It is similar to direct metal laser sintering (DMLS); the two are instantiations of the same concept but differ in technical details. Selective laser melting (SLM) uses a comparable concept, but in SLM the material is fully melted rather than sintered, allowing different properties (crystal structure, porosity, and so on). SLS (as well as the other mentioned AM techniques) is a relatively new technology that so far has mainly been used for rapid prototyping and for low-volume production of component parts. Production roles are expanding as the commercialization of AM technology improves.\r\n\r\nWorking of SLS - Selective Laser Sintering\u00a0\r\n\r\nIn this method, a thin layer of powder is applied using a roller. The SLS uses a laser beam to selectively fuse powdered materials, such as nylon, elastomers and metals into a solid object as shown in the Fig.\u00a0\r\n\r\nselective laser sintering process\r\n\r\n The CO2 laser is often used to sinter successive layers of powder instead of liquid resin. Parts are built upon a platform which sits just below the surface in a bin of the heat-fusible powder. A beam of laser then traces the pattern on the very first layer thereby sintering it together. The platform is further lowered by the height of the second layer and powder is again applied. This process is continued until the part is completed. The excess amount of powder at each layer helps to support the part during its build-up. \r\n\r\nAdvantages of SLS\r\n\r\n \tA distinct advantage of the SLS process is that because it is fully self-supporting, it allows for parts to be built within other parts in a process called nesting \u2013 with highly complex geometry that simply could not be constructed any other way.\r\n \tParts possess high strength and stiffness\r\n \tGood chemical resistance\r\n \tVarious finishing possibilities (e.g., metallization, stove enameling, vibratory grinding, tub coloring, bonding, powder, coating, flocking)\r\n \tBio compatible according to EN ISO 10993-1 and USP\/level VI\/121 \u00b0C\r\n \tComplex parts with interior components, channels, can be built without trapping the material inside and altering the surface from support removal.\r\n \tFastest additive manufacturing process for printing functional, durable, prototypes or end user parts.\r\n \tVast variety of materials and characteristics of Strength, durability, and functionality, SLS offers Nylon based materials as a solution depending on the application.\r\n \tDue to the excellent mechanical properties the material is often used to substitute typical injection molding plastics.\r\n\r\nDisadvantages\r\nSLS printed parts have a porous surface. This can be sealed by applying a coating such as cyanoacrylate.","headline":"Selective Laser Sintering  &#8211; Advantages and Disadvantages","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-08-15","mainEntityOfPage":"False","dateModified":"February 22, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/08\/Selective-Laser-Sintering-diagram-300x203.jpg","height":203,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/what-is-polyjet-3d-printing-technology-used-for-prototyping/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/08/polyjet-technology-300x137.jpg')"></div><span class="sr-only">link to What is Polyjet 3d printing Technology used For Prototyping</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/what-is-polyjet-3d-printing-technology-used-for-prototyping/">What is Polyjet 3d printing Technology used For Prototyping</a></p></header><div class="excerpt"><p>What is Polyjet 3d printing Technology used For Prototyping
What is Polyjet Technology used in 3d Printing Machines
Polymer Jetting ( PolyJet) has proved to be one of the most accurate additive...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/what-is-polyjet-3d-printing-technology-used-for-prototyping/" aria-label="View Post: What is Polyjet 3d printing Technology used For Prototyping">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"What is Polyjet 3d printing Technology used For Prototyping","url":"\/\/www.gunkrazy.com\/what-is-polyjet-3d-printing-technology-used-for-prototyping\/","articleBody":"What is Polyjet 3d printing Technology used For Prototyping\r\nWhat is Polyjet Technology used in 3d Printing Machines\r\nPolymer Jetting ( PolyJet) has proved to be one of the most accurate additive manufacturing technologies, in order to manufacture rapid\u00a0tools.\r\n\r\nWhat is PolyJet?\r\n\r\nPolyJet is a 3D printing\/additive manufacturing technology used for modeling, prototyping, and production applications. The technology offers exceptional detail, surface smoothness, and precision.\r\n\r\nPolyJet builds parts with photopolymer resins. Photopolymers or photocurable materials come in many different compositions, from flexible to rigid, transparent to opaque. PolyJet is one of two 3D printing technologies to print color directly into a part and it is the only technology capable of printing multiple materials simultaneously, offering gradations from stiff to flexible in one part. Polyjet also has the capability of creating over molded parts, moving assemblies, and multiple material property components from over 350,000 digital material options.\r\n\r\nRead More :\u00a03D Printing | Rapid Prototyping | Additive Manufacturing\r\n\r\nWhat file format is used to process a part on a PolyJet system?\r\n3D printing processes typically begin with a 3D CAD model that is then exported as an STL file. Other data inputs are possible through CT and MRI scans. There are also a variety of 3D scanners that can capture data and output STL files. The STL file is uploaded to the printer\u2019s software program. From there, the user can hit the print button to grow the part or can use more advanced features for specialized parts.\r\n\r\nWhat is the minimum thickness Stratasys PolyJet machines can print? (Also known as resolution)\r\nThe minimum layer thickness varies from 0.0006 inches to 0.0012 inches depending on material and machine. The user can choose a desired thickness based on the printer, the application, part intent, and material capabilities.\r\n\r\nPolyJet 3D printing technology and materials - Working\u00a0\r\n\r\nThe first Polyjet 3D printing system was launched by Objet Geometries Ltd. in 2000. Stratasys has acquired Objet Geometries Ltd. in 2012. The Polyjet 3D printing technique consists in building of parts, layer by layer, combining inkjet technology with photopolymerization\r\nprocess. The main steps are the following: pre-processing, processing and post-processing. In the pre-processing step, the part orientation on the build tray is optimized using Objet Studio software. In the next step, droplets of resin are deposited, in 16 micron\r\nlayers, onto a built tray via an inkjet print head (Fig. ), each layer being cured by UV light.\r\n\r\nThe building tray moves down and the process continues, layer by layer, until the part is complete. Two different photopolymer materials are used, model and support. In the last step, using a water jet recycling station the support material is removed. The accuracy of parts\r\nobtained by PolyJet technique is 0,1mm .\r\n\r\npolyjet technology\r\n\r\nBenefits of PolyJet :\r\n\r\n \tCreate smooth, detailed prototypes that convey final-product aesthetics.\r\n \tProduce accurate molds, jigs, fixtures and other manufacturing tools.\r\n \tAchieve complex shapes, intricate details and delicate features.\r\n \tIncorporate the widest variety of colors and materials into a single model for unbeatable efficiency.","headline":"What is Polyjet 3d printing Technology used For Prototyping","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-08-15","mainEntityOfPage":"False","dateModified":"February 22, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/08\/polyjet-technology-300x137.jpg","height":137,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/top-universities-for-mechanical-engineering-all-over-world/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/08/best-universities-for-Mechanical-Engineering-300x200.png')"></div><span class="sr-only">link to Top universities for mechanical engineering all over World</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/top-universities-for-mechanical-engineering-all-over-world/">Top universities for mechanical engineering all over World</a></p></header><div class="excerpt"><p>Top universities for mechanical engineering all over World
Mechanical engineering is the core branch that deals with the machines and manufacturing. It applies the engineering; physics and material...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/top-universities-for-mechanical-engineering-all-over-world/" aria-label="View Post: Top universities for mechanical engineering all over World">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Top universities for mechanical engineering all over World","url":"\/\/www.gunkrazy.com\/top-universities-for-mechanical-engineering-all-over-world\/","articleBody":"Top universities for mechanical engineering all over World\r\nMechanical engineering is the core branch that deals with the machines and manufacturing. It applies the engineering; physics and material science principle to design to analyze and manufacture the mechanical systems. It enables the students to understand the basic working mechanism of heavy tools and machinery. This course makes a student to have knowledge and experience in designing of electric motor, automobiles, aircraft and other heavy machinery. To get a high package job in this field, candidates need to be experienced engineer for the same. we will discuss top\u00a0universities for mechanical engineering all over World\r\n\r\nbest universities for Mechanical Engineering\r\n\r\nEducation from a well recognized university, college or school of engineering is important for all the mechanical engineers due to the highly technical nature of the discipline.\r\nTop 10\u00a0mechanical engineering universities\u00a0as per their\u00a0world\u00a0ranking:\r\n1) MIT (Massachusetts Institute of Technology):\r\nMeche, MIT is currently the most renowned and the top best Mechanical Engineering University in the world. MIT is well known for its highly advanced ideas and philosophies on engineering education.\r\n\r\n2) Stanford University:\r\nCalifornia\u2019s Stanford University is second in rank among the best mechanical universities in the world. It is best known for its entrepreneurial oriented engineering achievements.\r\n\r\n3) University of California, Berkeley (UC Berkeley):\r\nAccording to many reports and world rankings, UCB is another top mechanical school in the world. UCB offers undergraduate as well as graduate programs in the field, with specializations and more focuses in ocean engineering, energy and environment, mechatronics, bioengineering, computation, NANO and MEMS .\r\n4) University of Cambridge:\r\nRenowned to be one of the oldest universities in the world and one of the largest in the UK. It is reputed for outstanding academic achievements and the world-class original research done by the staff of the University and the Colleges.\r\n5) California Institute of Technology (Caltech):\r\nMechanical Engineering at Caltech has a century-long reputation for excellence. Today, they have students and faculty working on laboratory earthquakes, nano structured fuel cells, neural prosthetics, debris flows, active ferroelectric materials and devices, response of structures against accidental explosion and genetic algorithms for design.\r\n6) Imperial College London:\r\nSince many years,it continued to remain in the list of world\u2019s top ten mechanical engineering colleges. Its Department of Mechanical Engineering is one of the largest and most advanced departments in mechanical engineering in UK and across the world.\r\n\r\n7) University of Tokyo:\r\nIt has a long history of providing best mechanical engineering degrees hence yielding highly outstanding technical mechanical engineers in the world. The University offers mechanical engineering degrees at undergraduate as well as graduate level.\r\n\r\n8) Zurich (Swiss Federal Institute of Technology):\r\nZurich has one of the best Department of Mechanical Engineering. They offer best engineering degrees that is recognized over the world. The Department of Mechanical and Process Engineering educates students for excellence in science and industry through excellent research on an international platform to face the challenges of the global society by engineering innovation in its technology fields.\r\n\r\n9) University of Oxford:\r\nIt is the oldest university in the English-speaking world and has a claim to nine centuries of continuous existence. As an internationally reputed center for teaching and research, Oxford attracts students and scholars across the globe, with almost a quarter of students from overseas.\r\n\r\n10) National University of Singapore (NUS):\r\nAcknowledged as one of the finest universities in the world, NUS is a university offering a broad-based curriculum underscored by multi-disciplinary courses and cross-faculty enrichment. Its department of mechanical engineering is known to be one of the best in the world. It remains among the top ten of the world since a long time.","headline":"Top universities for mechanical engineering all over World","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-08-15","mainEntityOfPage":"False","dateModified":"February 22, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/08\/best-universities-for-Mechanical-Engineering-300x200.png","height":200,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/electric-power-assisted-steering-mechanical-project/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/08/Electric-Power-Assisted-Steering_clip_image004-300x249.gif')"></div><span class="sr-only">link to Electric Power Assisted Steering &#8211; Mechanical Project</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/electric-power-assisted-steering-mechanical-project/">Electric Power Assisted Steering &#8211; Mechanical Project</a></p></header><div class="excerpt"><p>Electric Power Assisted Steering - Mechanical Project
ABSTRACT
Electric Power-Assisted Steering (Epas) Is A New Power Steering Technology That Will Define The Future Of Vehicle Steering. The Assist...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/electric-power-assisted-steering-mechanical-project/" aria-label="View Post: Electric Power Assisted Steering &#8211; Mechanical Project">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Electric Power Assisted Steering &#8211; Mechanical Project","url":"\/\/www.gunkrazy.com\/electric-power-assisted-steering-mechanical-project\/","articleBody":"Electric Power Assisted Steering - Mechanical Project\r\nABSTRACT\r\nElectric Power-Assisted Steering (Epas) Is A New Power Steering Technology That Will Define The Future Of Vehicle Steering. The Assist Of Epas Is The Function Of The Steering Wheel Torque And Vehicle Velocity. The Assist Characteristic Of Epas Is Set By Control Software, Which Is One Of The Key Issues Of Epas. The Straight-Line Type Assist Characteristic Has Been Used In Some Current Epas Products, But Its Influence On The Steering Maneuverability And Road Feel Hasn't Been Explicitly Studied In Theory.\r\nIn This Paper, The Straight-Line Type Assist Characteristic Is Analyzed Theoretically. Then A Whole Vehicle Dynamic Model Used To Study The Straight-Line Type Assist Characteristic Is Built With Adams\/Car And Validated With Dcf (Driver Control Files) Mode Of Adams\/Car. Based On The Whole Vehicle Dynamic Model, The Straight-Line Type Assist Characteristic's Influence On The Steering Maneuverability And Road Feel Is Investigated. Based On The Driver's Request For The Ideal Relationship Between Steering Wheel Torque And Vehicle Velocity, The Vehicle Speed Proportional Coefficient Of The Assist Characteristic Can Be Determined By Making Steering Wheel Torque At Different Vehicle Lateral Acceleration Agree With The Request Of The Driver At A Certain Velocity. The Target Of This Paper Is Analyzing The Influence Of The Straight-Line Type Assist Characteristic On The Steering Maneuverability And Road Feel, And Studying How To Apply Simulation Method To Determine The Straight-Line Type Assist Characteristic Of Epas, Which Will Direct And Benefit The Adjustment Of The Assist Characteristic During The Road Test.\r\n\r\nRead more about steering :\u00a0Steering Gear boxes -Types Of Steering Gear Boxes\r\n\r\nINTRODUCTION\r\nSteering and braking are the most critical safety factors in vehicular control. Safe operation of the vehicle demands that the operator be able to maintain absolute control of the vehicle\u2019s critical operating dynamics:\r\n(1) Control of the direction of motion of the vehicle (steering)\r\n(2) Control of the velocity of the vehicle, i.e. the ability to slow and fully stop the vehicle (braking)\r\n\r\nElectric power steering (EPS or EPAS) uses an electric motor to assist the driver of a vehicle. Sensors detect the position and torque of the steering column, and a computer module applies assistive torque via the motor, which connects to either the steering gear or steering column. This allows varying amounts of assistance to be applied depending on driving conditions. Engineers can therefore tailor steering-gear response to variable-rate and variable-damping suspension systems, optimizing ride, handling, and steering for each vehicle. On Fiat group cars the amount of assistance can be regulated using a button named \"CITY\" that switches between two different assist curves, while most other EPS systems have variable assist. These give more assistance as the vehicle slows down, and less at faster speeds. In the event of component failure that fails to provide assistance, a mechanical linkage such as a rack and\u00a0pinion serves as a back-up in a manner similar to that of hydraulic systems.\r\n\r\n Electric Power Assisted Steering\r\n\r\nElectric systems have an advantage in fuel efficiency because there is no belt-driven hydraulic pump constantly running, whether assistance is required or not, and this is a major reason for their introduction. Another major advantage is the elimination of a belt-driven engine accessory, and several high-pressure hydraulic hoses between the hydraulic pump, mounted on the engine, and the steering gear, mounted on the chassis. This greatly simplifies manufacturing and maintenance. By incorporating electronic stability control electric power steering systems can instantly vary torque assist levels to aid the driver in corrective maneuvers. The first electric power steering system appeared on the Suzuki Cervo in 1988\r\n\r\nNEED OF EPAS\r\nDesign options are one of the biggest advantages to the electric power steering. With no pump, mounting bracket, hose or pulley or belt, a lot of under-hood space is liberated for other uses, especially when the servo motor is mounted on the column inside the car. The control unit can be, mounted anywhere on the vehicle, and it can vary the boost level infinitely over a wider range of conditions. Boost level can even become a driver-adjustable feature, and of course boost is available even when engine isn\u2019t running,\r\n\r\nNeeds a lot of data though, and the power requirement have an impact on the battery and charging system design. Also, the steering wheel torque sensor is a very sophisticated new device which means it\u2019s relatively early in its development and therefore, expensive. But when u think about all the hydraulic stuff you don\u2019t need for steering, the trade-off is quite acceptable from the engineering, service and environmental point of view. Eliminating power steering fluid from a vehicle provides obvious environmental advantages, along with the fuel saved by not having to drive a hydraulic pump with the engine. On the production line, the time requirement for installation and adjustment is significantly shorter. In the development lab, tuning the system to work in different vehicles takes a few hours of computer type, instead of several days needed to install and different hydraulic valve combinations.\r\n\r\nFirst, larger, heavier cars require more power to turn the steering wheel, and more expensive rack-mounted-motor design are more suitable for the smaller application.\r\nSecond, according to an SAE paper written by Dominique Peter and Ruck Gerhard of ZF Len system (Steering system) in Germany, the present generation of electric steering boost can\u2019t deliver the feel and handling that sriver\u2019s expect in larger, heavier cars, which in their country mean expensive cars.\r\nA good answer to both these problem lies in another \u201cnew\u201d technology that Delphi and others say is just around the corner: the 42-volt electrical system. Regardless of how an electric steering is configured, current draw would be very high, more than most of today\u2019s electrical systems can provide for any length of time.\r\n\r\nBASIC COMPONENT\u2019S AND WORKING\r\nThe system itself comprises main components: An electric control unit (E.C.U.) , a torque sensor, an electric motor and an intermediate gear with clutch. All these components are integrated into one unit which can be placed on any part of steering column. A database is used to communicate the vehicle speed and engine speed to the EPAS system and the torque sensor detects the force the driver is using to turn the steering wheel. All this information is passed to the ECU.\r\nThe ECU uses this information to calculate the additional force required by the EPAS system to achieve the pre-programmed steering feel. The steering power is then transmitted by engine to the steering gear by means of an intermediate gear system. The ratio between manual steering torque and electric power controlled in relation to vehicle speed, offering the relevant assistance at varying speeds.\r\n\r\nAt low speed the system offers maximum power, making the steering easy to operate, and at increased speed, when little or no assistance is required reduces amount of power supplied.\r\nThroughout this operation the ECU monitors the system constantly to detect malfunctions and, if necessary, disengages the power assistance with the aid of a built clutch. This ensures that the car still steerable if a fault occurs.\r\n\r\nFUTURE SCOPE\r\n\r\nTo-date, technical and product liability concerns have precluded the introduction of such systems in the U.S. market through it is expected that niche application may be expected in the near-to-midterm mix of future vehicles. Such system designs have yet to prove themselves sufficiently reliable and safe to prevent dangerous auto steer event. Auto steer has crept into the lexicon as an adjunct to the development of EPS system. As the name implies Auto steer denote an uncontrolled steering event neither commanded nor stoppable by the vehicles driver due to catastrophic failure in the electron hardware or software. In truth, these systems are control servo systems, similar in function to aircraft control servo systems, and must have multiple redundancies.\r\nAlthough these new EPAS systems are said to have multiple redundancy, their design and broad application within the automotive industry have been, and will continue to be, subject to economic pressure more extreme then found in the aircraft industry. For instance one obvious safety related item has been universally deleted from such system specifications: a clutch for physically disengaging the reduction gear box and drive motor assist assembly from the host steering system in the event of system failure. This means that a driver encountering an EPAS system failure will have to exert additional force to \u201cBack drive\u201d The systems reduction gear box and drive motor assist assembly while attempting to maintain control of the vehicle in the absence of normal power steering assist.","headline":"Electric Power Assisted Steering &#8211; Mechanical Project","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-08-15","mainEntityOfPage":"False","dateModified":"February 22, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/08\/Electric-Power-Assisted-Steering_clip_image004-300x249.gif","height":249,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/heat-transfer-analysis-of-engine-cylinder-fins-having-triangular-shape/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/08/Heat-Transfer-Analysis-of-Engine-Cylinder-Fins-Having-Triangular-Shape-300x150.jpg')"></div><span class="sr-only">link to Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/heat-transfer-analysis-of-engine-cylinder-fins-having-triangular-shape/">Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape</a></p></header><div class="excerpt"><p>Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape
Indian two-wheeler market is the world's second biggest market. Among the three segments (motorcycles, scooters and mopeds) of...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/heat-transfer-analysis-of-engine-cylinder-fins-having-triangular-shape/" aria-label="View Post: Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape","url":"\/\/www.gunkrazy.com\/heat-transfer-analysis-of-engine-cylinder-fins-having-triangular-shape\/","articleBody":"Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape\r\nIndian two-wheeler market is the world's second biggest market. Among the three segments (motorcycles, scooters and mopeds) of the Indian two wheeler market, major growth trends have been seen in the motorcycle segment over the last four to five years due to its resistance and balance even on bad road conditions. In Indian motorcycles, Air-cooling is used due to reduced weight and simple in construction of engine cylinder block. As the air-cooled engine builds heat, the cooling fins allow the wind and air to move the heat away from the engine. Low rate of heat transfer through cooling fins is the main problem in this type of cooling. The Engine cylinder is one of the major automobile components, which is subjected to high temperature variations and thermal stresses. In order to cool the cylinder, fins are provided on the surface of the cylinder to increase the rate of heat transfer. By doing thermal analysis on the engine cylinder fins, it is helpful to know the heat dissipation inside the cylinder. The principle implemented in the project is to increase the heat dissipation rate by using the invisible working fluid, nothing but air. We know that, by increasing the surface area we can increase the heat dissipation rate, so designing such a large complex engine is very difficult. The main purpose of using these cooling fins is to cool the engine cylinder by air. The main aim of the project is to analyze the thermal properties by varying geometry, material of cylinder fins.\r\n\r\nThere are three basic mechanisms of heat transfer which are often referred as modes of heat transfer. These are conduction, convection and radiation. All the energy transfer that takes place in the form of heat is either any one or a combination of these.\r\n1. Conduction\r\n2. Convection\r\n3. Radiation\r\n\r\nExtended Surfaces\r\n\r\nIt is most common approach to enhance the Heat transfer by using the extended surfaces. A plain fin may increases the surface area but a special shape extended surface may increase heat transfer coefficient in addition to the heat exchanger. The extended surfaces for liquids typically use much smaller fin heights than that used for gases because of the higher heat transfer coefficient for liquids. Use of high fins with liquids would result in low fin efficiency and result in poor material utilization. Externally finned tube and internally finned tube are tha examples of extended surfaces for liquids.\r\n\r\nHeat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape\r\n\r\nThe temperature distribution, rate of heat transfer and fin effectiveness for six common profiles of longitudinal fins are given below. The analytical expressions given for these profiles are based on the following assumptions:\r\n1. The heat conduction in the fin is steady and one dimensional.\r\n2. The fin material is homogeneous and isotropic.\r\n3. There is no energy generation in the fin.\r\n4. The convective environment is characterized by a uniform and constant heat transfer coefficient and temperatures.\r\n5. The fin has a constant thermal conductivity.\r\n6. The contact between the base of the fin and the primary surface is perfect.\r\n7. The fin has a constant base temperature.\r\n\r\nApplication\r\n1. Fins are commonly used as heat management in electrical appliances.\r\n2. Condensers in Refrigeration and Air Conditioning.\r\n3. Engine Cooling.\r\n4. Thin plate of fins of Car Radiator\r\n5. Heat exchanger in power plant\r\n6. Most effective in application where heat transfer coefficient (h) is low.\r\n7. Nature has also taken advantage of the phenomena of fins. The ears of jackrabbits and fennec foxes act as fins to release heat from the blood that flows through them.\r\n8. In old times say Dinosaur time, Fins are on the backside of the Dinosaur.\r\n9. Fins are also used in automobiles like engine cylinder with fins.\r\n\r\nReference and Download :\r\n\r\nHeat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape","headline":"Heat Transfer Analysis of Engine Cylinder Fins Having Triangular Shape","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-08-15","mainEntityOfPage":"False","dateModified":"February 22, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/08\/Heat-Transfer-Analysis-of-Engine-Cylinder-Fins-Having-Triangular-Shape-300x150.jpg","height":150,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/what-is-piezoelectricity-application-of-piezoelectricity/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/08/piezoelectricity-application-300x154.gif')"></div><span class="sr-only">link to What is Piezoelectricity &#8211; Application Of Piezoelectricity</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/what-is-piezoelectricity-application-of-piezoelectricity/">What is Piezoelectricity &#8211; Application Of Piezoelectricity</a></p></header><div class="excerpt"><p>What is Piezoelectricity - Application Of Piezoelectricity
What is Piezoelectricity :   Piezoelectricity, also called the piezoelectric effect, is the ability of certain materials to generate...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/what-is-piezoelectricity-application-of-piezoelectricity/" aria-label="View Post: What is Piezoelectricity &#8211; Application Of Piezoelectricity">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"What is Piezoelectricity &#8211; Application Of Piezoelectricity","url":"\/\/www.gunkrazy.com\/what-is-piezoelectricity-application-of-piezoelectricity\/","articleBody":"What is Piezoelectricity - Application Of Piezoelectricity\r\nWhat is Piezoelectricity :\u00a0\r\n\r\nPiezoelectricity, also called the piezoelectric effect, is the ability of certain materials to generate an\u00a0AC\u00a0(alternating current)\u00a0voltage\u00a0when subjected to mechanical stress or vibration, or to vibrate when subjected to an AC voltage, or both. The most common piezoelectric material is quartz. Certain ceramics, Rochelle salts, and various other solids also exhibit this effect.\r\n\r\nPiezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins) in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat.\r\n\r\nThe piezoelectric effect results from the linear electromechanical interaction between the mechanical and electrical states in crystalline materials with no inversion symmetry. The piezoelectric effect is a reversible process: materials exhibiting the piezoelectric effect (the internal generation of electrical charge resulting from an applied mechanical force) also exhibit the reverse piezoelectric effect, the internal generation of a mechanical strain resulting from an applied electrical field.\r\n\r\npiezoelectricity application\r\nMajor Application of Piezoelectricity :\r\nPiezoelectricity is exploited in a number of useful applications, such as the\r\n\r\n \tproduction and detection of sound,\r\n \tpiezoelectric inkjet printing,\r\n \tgeneration of high voltages,\r\n \telectronic frequency generation,\r\n \tmicrobalances, to drive an ultrasonic nozzle, and\r\n \tultrafine focusing of optical assemblies.\r\n \tIt forms the basis for a number of scientific instrumental techniques with atomic resolution, the scanning probe microscopies, such as STM, AFM, MTA, and SNOM. It also finds everyday uses such as acting as the ignition source for cigarette lighters, and push-start propane barbecues, as well as being used as the time reference source in quartz watches.\r\n \tA piezoelectric\u00a0transformer\u00a0is a type of AC voltage multiplier. Unlike a conventional transformer, which uses magnetic coupling between input and output, the piezoelectric transformer uses\u00a0acoustic coupling.\r\n \tThe best-known application is the electric cigarette lighter: pressing the button causes a spring-loaded hammer to hit a piezoelectric crystal, producing a sufficiently high-voltage electric current that flows across a small spark gap, thus heating and igniting the gas. The portable sparkers used to ignite gas stoves work the same way, and many types of gas burners now have built-in piezo-based ignition systems.\r\n \tPiezoelectric sensors especially are used with high frequency sound in ultrasonic transducers for medical imaging and also industrial nondestructive testing (NDT).\r\n \tPiezoelectric motors: Piezoelectric elements apply a directional force to an axle, causing it to rotate. 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