通过光弹性试验和有限元法计算证实；
本文应用有限元法和光弹性试验对活塞顶的裂纹进行断裂力学分析。
This paper studies the fracture mechanics of piston crown crack by means of finite element method and photoelastic method.
光弹性试验结果表明锥齿轮在两种载荷分别作用下，齿根应力分布是不同的。
The results show that the stress distributions in roots of the bevel gear are different under respective loads.
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