extrapolation method

Then KI was also determined by numerical extrapolation method.

针对三维椭圆裂纹,通过特定的坐标转换,得到了沿椭圆长、短轴方向的应力分布及其高阶项,并依据该高阶项,提出了三维裂纹问题的应力强度因子数值外插法,通过有限元分析,证实了所提出的外插法的有效性。

The stress intensity factor (SIF) along the crack front is obtained by numerical extrapolated method.

文章使用蜕化２０节点等参元（Ｑ２０）求空间裂纹面上的位移，用数值外插法求沿裂纹前缘的应力强度因子。