Thermal Fatigue Analysis of the Engine Exhaust Manifold

Abstract

Exhaust manifold is the main heated part of the engine, which bears the alternating heat loads and vibration loads in the process of high speed rotation in the extremely bad working environment. According to the method of fluid-solid coupling, the temperature, stress, strain and failure process of the exhaust manifold is reproduced through Abaqus finite element analysis and practical fatigue failure analysis. Comparing the simulation results with the real situation, it is proved that the finite element model is reasonable and the solving conditions are accurate. The further study of the problem will provide theoretical basis for the subsequent materials and structure optimization of the exhaust manifold, which will have important reference for the thermal fatigue damage, life prediction and control under the high temperature and thermal shock.