Study on Low Cycle Fatigue Life of Integrated Exhaust Manifold
The design of the integrated exhaust manifold makes the exhaust part receive repeated impact of high and low temperature loads,so there will be a large stress concentration in the local area,which exceeds the yield strength of the material,resulting in plastic deformation and the risk of low cycle fatigue failure.Based on the finite element method,this paper calculates the transient temperature field results of an impact cycle,and based on the results of the stress and strain analysis under alternating conditions,studies the temperature,stress and strain change law of the dangerous position of the exhaust part,and obtains the fatigue life of the position based on the local stress strain method,which provides an analysis method for the cylinder head design.
Integrated exhaust manifoldLow cycle fatigueLocal stress and strain methodTransient tem-perature field
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