吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (5): 1450-1454.doi: 10.13229/j.cnki.jdxbgxb201505011

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Effects of mechanical constraints on the cylinder head thermal fatigue simulation test

LIU Zhen-tao, SUN Zhao-hui, PAN Jun, HUANG Rui, CHEN Jun-xuan, YU Xiao-li   

  1. Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2013-12-12 Online:2015-09-01 Published:2015-09-01

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Abstract: I order to study the effect of preload on cylinder head thermal fatigue, a thermal fatigue test bench for cylinder head is established, which takes the preload into consideration. The comparative tests on one certain type of cylinder head with and without preload are carried out. The results show that, with and without preload, at the cylinder head thermal test points the relative error of the maximum thermal stress is higher than 20%, and an average relative error of higher than 10% under these two conditions. In summary, the results indicate that mechanical constraint is essential in the simulation test of cylinder head thermal fatigue.

Key words: power machinery and engineering, cylinder head, mechanical constraint, thermal fatigue test, thermal stress comparison test

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  • TK4
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