Finite Element Analysis of Crankshaft Stress and Vibration in Internal Combustion Engines Using ANSYS

Internal combustion engines are thermal engines in which a fuel-air mixture
undergoes combustion within the combustion chamber. The high-pressure and hightemperature
gases generated during this process expand, exerting force upon the
pistons and converting chemical energy into mechanical energy. This retraction
movement is transformed into a rotational motion that generates the necessary
torque to rotate the wheels via the crankshaft. Common examples of these engines
include four-stroke and two-stroke piston engines, gas turbines, jet engines, and most
rocket engines. This study aims to develop a model of the piston-connecting rodcrankshaft
system and investigate the thermal and mechanical stresses resulting from
its operation. Utilizing the finite element method in conjunction with ANSYS
software, the simulation of thermal and mechanical stresses is carried out, while
random vibrations are applied to represent potential imperfections and errors during
operation. The SOLIDWORKS program is employed for the design and illustration
of the system. Simulation results indicate that maximum vertical stress and shear
stress are primarily distributed along the piston heads and connecting rods.

Keywords:
crankshaft, finite element method, modal
analysis, ANSYS

Finite Element Analysis of Crankshaft Stress and Vibration in Internal Combustion Engines Using ANSYS | IIETA