Abstract: There is a growing demand in components' performance that have low cost. To reduce the time it takes to manufacture new goods, R&D and testing engineers must build crucial components as quickly as feasible. It needs a thorough grasp of emerging technology as well as rapid incorporation into product development. In reciprocating IC engines, a piston seems to be a component which is a moving part of a cylinder which is sealed by piston rings. The piston's upper end experiences the most stress, so stress concentration is one of the leading reasons of fatigue failure. FEA is frequently used in the characterisationof stress distribution on an internal combustion engine's piston. FEA is performed with the help of CAD and CAE software. Its major goals are to explore and analyse the thermal and mechanical stress distribution of the piston throughout the combustion process in an actual engine. The paper also explains how to use FEA to examine the stress. The structural model of a piston is created utilizing CATIA software. Simulation and stress analysis were carried out using the ANSYS V14.5.