The thermal cycle load incorporates cold beginning at the start of vehicle, at full load and a cooling period when
vehicle has halted. Any one of activities causes the failure of the exhaust manifold.
The thermal fatigue analysis has performed on the exhaust manifold at high temperature condition. Convection and
temperature are applied as thermal boundary conditions and pressure is applied as static boundary condition. Grey cast iron,
stainless steel and D5S alloy are used as material. Temperature distribution, von misses stress, fatigue life and total
deformation of the materials are compared with each other
