Analysis of arbitrary shaped three-dimensional cracks by using a virtual crack-closure integral method (VCCM) for tetrahedral finite element
This paper describes the development of a software to perform three-dimensional crack propagation analyses.The software is based on the conventional finite element method with second order tetrahedral element and an automatic mesh generation software.Hexahedral finite elements have historically been used in fracture analyses and methodologies to compute the crack parameters have been developed for the hexahedral elements.In present research,the authors have developed a VCCM (virtual crack closure-integral method) for the second order tetrahedral finite element.Use of the tetrahedral element allows us to utilize an automatic mesh generation software.The direction and rate of crack propagation are predicted based on the stress intensity factors and the shape of crack is updated.Hence,a software package containing the modules for mesh generation,for finite element analysis,for stress intensity factor evaluation,for predicting the rate and the direction of crack propagation and for updating crack configuration,can be developed.
Fracture mechanics Crack propagation analysis Stress intensity factor Finite element method Virtual crack closure-integral method
Hiroshi Okada Takashi Tokuda Hiroshi Kawai Yasuyoshi Fukui
Tokyo Science University,Yamazaki 2641,Noda,Chiba 278-8510,Japan Kagoshima University,1-21-40 Korimoto,Kagoshima 890-0065.Japan University of Tokyo,7-3-1 Hongo,Bunkyo-ku,Tokyo 113-8656,Japan
国际会议
成都
英文
59-64
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）