Thermo-Mechanical Stress Analysis of Engine Components Using FEA

This study proposes a thermo-mechanical finite element analysis model for engine piston stress and fatigue analyses. The piston, piston ring, pin, bushing, cylinder liner, and connecting rod constitute the model. All of the contact areas between piston and piston pin, piston pin and bush, piston skirt and cylinder liner are considered, as well as oil film and contact pressure. A self-assembled The initial oil film clearance between the piston pin and piston, the piston and bush, and piston skirt and cylinder liner is calculated using a code considering the ellipticity and piston skirt profile. To perform the stress and fatigue analyses, power train commercial software is used to calculate the dynamic loads of the connecting rod and the piston when subjected to the peak torque and peak power conditions. Unlike the ones in the literature, the present model can simulate the more accurately the piston’s actual operating conditions. The piston skirt pressure, stress, and fatigue life of the corresponding piston sections can be analyzed and calculated using the model.