结果表明，应用子模型技术估算三维双材料结构的应力奇异性指数是有效的。
It is shown that FEM sub-modeling technique is valid for estimating the index of stress singularity for three-dimensional bi-material structure.
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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