File Name: design and analysis of piston by composite materials .zip
Piston has to endure the cyclic gas pressure and the inertial forces at work, and this working condition may cause the fatigue damage of the piston such as piston side wear, piston head cracks and so on.
Usually the pistons are made of Aluminum for lightweight, thermal conductivity. But it has poor hot strength and high coefficient of expansion makes it less suitable for high temperature applications. Compared to Aluminium, AlSiC has better abrasion resistance, creep resistance, dimensional stability, exceptionally good stiffness-to-weight and strength-to-weight ratios and better high temperature performance. Fabrication of piston using AlSiC is also easier than using Aluminium.
It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and or connecting rod. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder.
In some engines, the piston also acts as a valve by covering and uncovering ports in the cylinder wall. Usually the pistons are made of Aluminium for lightweight, thermal conductivity. Compared to Aluminium, AlSiC has better abrasion resistance, creep resistance, dimensional stability, exceptionally good stiffness-to-weight and strengthto-weight ratios and better high temperature performance. The effect of high temperature on mechanical properties of silicon carbide particulate reinforced cast aluminium alloy composite is analysed.
An extensive literature survey has been done to collect the material properties of AlSiC. Design of Body: Catia V6 offers a range of tools to enable the generation of a complete digital representation of the product being designed.
In addition to the general geometry tools there is also the ability to generate geometry of other integrated design disciplines such as industrial and standard pipe work and complete wiring definitions. Tools are also available to support collaborative development. A number of concept design tools that provide up-front Industrial Design concepts can then be used in the downstream process of engineering the product.
These range from conceptual Industrial design sketches, reverse engineering with point cloud data and comprehensive free-form surface tools. The models are shown in figure 1and figure 2 shows piston assembly. All rights reserved by A thin, waterproof layer of aluminium oxide is formed on contact with the air. Aluminium is a very important construction material in combination with other metals. The major compounds of aluminium are the oxide, hydroxide, chloride, sulphate, silicate, and acetate.
The addition of a small amount 0. Table 4. Advantages of Aluminium: 1 It s lightweight Aluminium weighs less by volume than most other metals. In fact, it is about one-third the weight of iron, steel, copper, or brass.
This makes it easier to handle and less expensive to ship. Cold-weather applications are particularly well-served by aluminium because, as temperatures fall, aluminium actually becomes stronger. It s protected by its own naturally occurring oxide film, a protection that can be further enhanced by anodizing or other finishing techniques. These factors make it ideal for applications requiring heat exchangers.
This makes it a great choice in applications that involve explosive materials or that are used in highly flammable environments. This makes the parts stronger and less likely to leak or loosen over time. But we can t use aluminium itself we mix aluminium with silicon carbide to get better properties than when we use aluminium itself. Aluminium Silicon Carbide: Aluminium- Silicon Carbide is a metal-ceramic composite material consisting of silicon carbide particles dispersed in a matrix of aluminium alloy.
It combines the benefits of high thermal conductivity of metal and low CTE coefficient of thermal expansion of ceramic. Al-SiC is compatible with a wide range of metallic and ceramic substrate and plating materials used in microelectronic packaging for aerospace, automotive, microwave applications.
Figure 4. High thermal conductivity conducts heat almost like aluminium Light weight and strong almost as light as aluminium but stronger, it is excellent for aerospace, automotive and other mobile applications. Precision surface treatment surface roughness; hole-drilling; plating with nickel, gold, silver, tin, etc. C C Specific gravity C Table 2. And we compared material properties and found that AlSiC has superior properties. Analysis Using Ansys : Fig. Figures 5.
In general, smaller elements give more accurate results but require more computer resources and time. The size is only an average value, actual element sizes may vary from one location to another depending on geometry. For a more accurate solution, use a smaller element size. After meshing the model the boundary conditions are applied properly then the final results are obtained. The following figure shows the final results of structural analysis for different materials like Aluminium, AlSiC.
Thermal Analysis: Thermal analysis is a group of techniques in which the variation of a physical property of a substance is measured as a function of temperature. The most commonly used techniques are those which measure changes of mass or changes in energy of a sample of a substance. Figure 5. Temperature variation across various piston heights of piston in stedy state condition shown in figure 5.
Maximum temperature at top. And found that aluminium silicon carbide has better properties such Less heat flux through boundaries. Static Structural Analysis: 1 Introduction: A static structural analysis determines the displacements, stresses, strains, and forces in structures or components caused by loads that do not induce significant inertia and damping effects.
Steady loading and response conditions are assumed; that is, the loads and the structure's response are assumed to vary slowly with respect to time.
The types of loading that can be applied in a static analysis include: 1 Externally applied forces and pressures 2 Steady-state inertial forces such as gravity or rotational velocity 3 Imposed nonzero displacements 4 Temperatures for thermal strain Fig. Deformation found to be less in aluminium carbide piston. Aluminium carbide piston has good properties.
Elastic strain found to be less in aluminium carbide than aluminium. Composite piston made of metal matrix offers high strength retention on ageing even at severe environments.
Compared to aluminium, the aluminium silicon carbide is found to have lesser deformation, lesser stress and good temperature distribution. Some of the limitations faced by aluminium piston are overcame by the aluminium silicon carbide piston.
Engine Bearing Materials Dr. Venkata Rajam 1, P. Murali Krishna 3, G. L79 and D. D A. Castings may be in the cast M of fully heat treated TF conditions. Module 3 Machinability Lesson 1 Cutting Tool Materials of common use Instructional Objectives At the end of this lesson, the students will be able to i Identify the needs and cite the chronological development.
Aluminium as Construction Material in Ammonia Refrigeration Cycles Experiences With Aluminium Compared to other metals, aluminium has only a brief history as an engineering material. While, about years. Engine Heat Transfer 1. Impact of heat transfer on engine operation 2. Heat transfer environment 3. Energy flow in an engine 4. Engine heat transfer Fundamentals Spark-ignition engine heat transfer Diesel.
These properties. There are 3 types of welding:, and, welding. The oxy acetylene flame, with a temperature of Fahrenheit is produced. Handling Corrosive or Abrasive Liquids Defining abrasion and corrosion An abrasive liquid is one that has particles in it. Some, like inks, have very fine particles, while others, like some paints, contain.
Mechanical Properties of Metals Mechanical Properties refers to the behavior of material when external forces are applied Stress and strain fracture or engineering point of view: allows to predict the. Technical Data 7. Bearing Fits 7. Training Objectives After watching the video and reviewing this printed material, the viewer will gain knowledge and understanding of cutting tool metallurgy and specific tool applications for various.
Lee msfc. It is used to produce cylindrical. Geometry and dimensional tolerances of engine bearings Dr. Hydrodynamic lubrication Engine bearings operate mostly in the hydrodynamic regime of. FEM analysis of the forming process of automotive suspension springs Berti G. This information is based on our present state of knowledge and is intended to provide general notes on our products and their.
Metal Forming and Theory of Plasticity Yrd. Requirements First. Each issue contains useful information on materials cast irons, steels,. Mechanical, A.
Show all documents Design and Analysis of the Piston using Three Materials Analytical calculations are done for cast iron piston. For doing analytical calculation material properties and dimensional information should be known and so all the parameters consider for design of piston are calculated by using one analytical problem. Design Considerations for a Piston In designing a piston for an engine, the following points should be taken into consideration: It should have enormous strength to withstand the high pressure. One of the design criteria is the endeavor to reduce the structures weight and thus to reduce fuel consumption. This has been made possible by improved engine design. These improvements include increased use of lightweight materials , such as advanced ultra-high tensile strength steels, aluminum and magnesium alloys, polymers, and carbon-fiber reinforced composite materials.
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Shankariah Published The piston is a heart of the engine and its working condition is the most exceedingly bad one of the key parts of the engine in the workplace. A piston is a segment of responding piston, responding pumps, gas compressors and pneumatic chambers, among other comparative systems.
International Journal of Automotive Science and Technology. Year , Volume 4 , Issue 2, Pages 30 - 39 Zotero Mendeley EndNote. Reaction forces and linear velocity at different combustion time, thermal stresses, equivalent strains, resultant and displacement on the piston were determined. It was observed that the higher the engine speed, the higher the reaction forces and resultant displacements on the piston.
Show all documents Compared to Aluminium AlSiC has better abrasion resistance,.
This paper presents a thermo-mechanical finite element analysis model for the stress and fatigue analyses of engine pistons. The model consists of the piston, piston pin, piston ring, bushing, cylinder liner and connecting rod. The oil film and contact pressure are considered in the contact surfaces between the piston and piston pin, the piston pin and bush, and the piston skirt and cylinder liner. A self-compiled code, which considers the factors of the piston skirt profile and ellipticity, is applied to calculate the initial clearance at the oil film surfaces between the piston and piston pin, the piston pin and bush, and the piston skirt and cylinder liner. The dynamic loads of the piston and connecting rod under the peak torque and peak power cases are calculated using powertrain commercial software, which are then used to carry out the stress and fatigue analyses. Compared with those published in literature, the present model is able to simulate the actual working conditions of the piston more accurately. The model can be used to evaluate and assess the piston skirt pressure, the stress and fatigue life of the concerned areas of the piston.
The materials used in this project are aluminium alloy, and SiC reinforced ZrB2 composite material. In this project the natural frequency and Vibration mode of the.
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