认为产生粘扣的主要原因是螺纹齿面局部过量的塑性变形，通过变锥度的方式能使接触应力分布规律得到改善，并在现场生产中得到验证。
The results showed that the major cause of thread gluing is over plastic deformation of partial thread face, and that the distribution of contact stress can be improved with the taper mutation, wh...
通过量级分析，给出了尖端场的应力应变奇异性指数。
The stress and strain singularity exponent of crack-tip field is given by means of the asymptotic analysis.
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