Simulation on microscopic deformation behavior of engine gasket

Shanghai Key Laboratory of Digital Manufacture for Thinwalled Structures, Shanghai Jiao Tong University, China

^a Corresponding author: E-mail: yxzhao@sjtu.edu.cn

Abstract

Engine gasket is the thin steel plate with coatings. Its compressive deformation affects the height of engine assembly, which changes combustion chamber’s volume and then influences engine performance. In this paper, the assembly simulation of head, block and gasket was studied. Then a further simulation takes the thin coatings on steel sheet into consideration. In the second simulation, gasket’s partial micro-model in micron-scale meshes was established and deformation of coatings was analysed. The combination of deformations explores the cause of fluctuations of gasket’s tightened thickness and obtains more precise numerical results of tightened thickness at different positions. Moreover, a lead pellet test was carried out to verify the results of tightened thickness calculation.