摘要
介绍了求解应力强度因子(K因子)的一种新型位移插值法,以受均布载荷作用下的无限大体深埋椭圆裂纹问题,论证了新方法的位移插值基础,研究了两种方法的理论插值误差.理论分析和数值结果均证明,求解K因子的位移插值法的精度高于传统的蜕化奇异等参元法.
An introduction is given to a new displacement extrapolation method for calculation of the stress intensity factor (SIF). In combination with the problem of elliptical cracks in an infinite embedded body under uniformly distributed loads, the basis for the new extrapolation method is verified. The error of extrapolation by two methods, i.e. the displacement extrapolation method and the degenerate singular isoparametric element method, is analyzed. Theoretical analysis and numerical calculation show that the precision of the displacement extrapolation method is higher than that of the degenerate singular isoparametric element method.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第6期662-665,共4页
Journal of Hohai University(Natural Sciences)
关键词
应力强度因子
位移插值法
裂纹
蜕化奇异等参元法
均布载荷
stress intensity factor (SIF)
displacement interpolation method
degenerate singular isoparametric element
