Stress Analysis of Piston of Two stroke engine using Photo-Elasticity and Numerical Methods

Abstract

This paper deals with the design of piston of a two stroke I C engine and its stress analysis through photo-elasticity and Numerical method. First the piston is designed for the specified load acting on the piston and induced stresses are determined. Three models of piston are considered with varied web thickness. The photo-elasticity models are prepared using photo-elastic materials. The models are tested for stress distribution at various key points through Polariscope. The same models are built in ANSY 12 and analyzed for stresses at various points. The results are compared and the results are closely related. The advantages of the photo-elasticity method are easy to understand, through visualization of stress pattern and determining stress at any point on the model since the fringe value of the material is known. The use of the design piston is suggested. Index Terms: ANSY, fringe value, model, Photo-Elasticity, Piston, Polariscope, stress analysis etc.