Abstract
Background/Objective: Cylinder liners are very important part of an automobile engine and working of the liner directly affects the engine performance. Conventional cylinder liners are being replaced with high temperature composite materials. The present work is to identify the performance of cylinder liners under combined mechanical and thermal load in terms of radial, longitudinal and hoop stresses by selecting different high temperature composite materials. Methods/ Findings: Different high temperature composite materials such as Carbon/Polyimide, Woven Carbon/Phenolic, Woven Graphite Phenolic, Carbon/Carbon composite, Boron/Aluminum, Silicon/Carbide composite cylinder liners are analyzed by applying pressure and thermal load. The variation in the radial stresses (σr ), longitudinal stresses (σl ) and hoop stresses (σθ ) are identified for selected materials. Thermo mechanical strains in radial, axial and circumferential directions are also identified. The analysis is performed by Finite element based software ANSYS. Solid 8node 183 elements are selected to perform the analysis. The Fe models are validated with the analytical equations. Application: Among all the materials considered in the analysis, Carbon/Carbon composite performance is good under considered loading and boundary conditions. Compared to all the stresses, the severity of axial stresses is more than radial and hoop stresses. The present work is used for the effective design of cylinder liners with high temperature composite materials. Keywords: Axial Stress, Cylinder Liner, Finite Element Method, High Temperature Composite Materials, Hoop Stresses, Radial Stresses
Highlights
A continuous demand for economy, quality of internal combustion engine leads to the development of automobile engines
The objective of the present work is to estimate the stresses induced in the cylinder liners due to combined loading such as pressure and thermal loading conditions
Thermo mechanical analysis of cylinder liners for different materials is evaluated by using the Finite Element Method
Summary
A continuous demand for economy, quality of internal combustion engine leads to the development of automobile engines. One is to reduce the fuel consumption, so that the cost of the automobile maintenance as well as global worming will be decreased. Another aspect is to decrease the weight of the engine which interns decrease the fuel consumption. The weight of the engine will be decreased by replacing the already used conventional materials by new materials. The objective of the present authors is used to replace the conventional cylinder liners with composite material to increase the strength to weight ratio. Many authors studied the cylinder liners, engine parts in the view of material and production process. The authors studied the micro hardness distribution of the hardened cylinder layers in order to evaluate the quality of the hardened layers.
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