摘要
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。在选择典型算例和大量计算的基础上，分析了数值外插法在求解空间裂纹应力强度因子方面的优越性，以及单元尺寸对数值精度的影响，并通过特定方法确立了裂尖单元尺寸的最佳范围。
In this paper,the displacements on crack face are solved by using the collapsed 20 node quadrilateral isoparametric elements.The stress intensity factor (SIF) along the crack front is obtained by numerical extrapolated method.Based on a large number of numerical examples,the superiority of the numerical extrapolated method for calculating the 3 D stress intensity factor along the crack front is discussed,and the influence of the element′s length on computational accuracy is analyzed.The optimum size of elements along crack front are determined by special method.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
1999年第4期26-31,共6页
Journal of Hefei University of Technology：Natural Science
关键词
应力强度因子
数值外插法
裂纹
空间裂纹
the 3 D stress intensity factor
numerical extrapolated method
the collapsed 20 node quadrilateral isoparametric element
