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采用冻结切片三维光弹试验方法，对双渐开线齿轮的弯曲应力进行研究，试验结果与有限元计算相吻合；在高频疲劳强度试验机上完成软、硬齿面轮齿的弯曲疲劳强度试验，结果表明轮齿的断裂位于齿根处30°与40°之间，当齿厚变位系数为0.08时，双渐开线齿轮的弯曲强度大约提高了16%。
The bending stress of the double involute gear was studied by the frozen slice 3D photoelastic test method. The experimental results are consistent with the finite element calculation. The bending fatigue strength test of the soft and hardened tooth on the high frequency fatigue strength tester . The results show that the tooth breakage is between 30 ° and 40 ° at the tooth root, and the flexural strength of the double involute gear is increased by about 16% when the tooth thickness variation coefficient is 0.08.