文章基本信息

标题：一般逆行列を用いた等価分布応力決定法に関する研究（その1）－中央貫通き裂の影響関数を用いた二次元端部き裂の解析－
本地全文：下载
作者：豊貞雅宏 ; 田中和輝 ; 松本恭典等
期刊名称：日本船舶海洋工学会論文集
印刷版ISSN：1880-3717
电子版ISSN：1881-1760
出版年度：2020
卷号：31
页码：213-228
DOI：10.2534/jjasnaoe.31.213
出版社：社団法人日本船舶海洋工学会
摘要：The authors (Toyosada and Niwa, 2001) proposed to evaluate the Elastic-Plastic Fracture Mechanics (EPFM) parameters of edge and surface cracks by applying a crack face traction to a center-cracked infinite plate so that the relation between the crack length and SIF ( α-K relation) is reproduced. This crack face traction is called Equivalent Distributed Stress (EDS). An EDS determination technique based on spline interpolation and generalized matrix inversion has been developed. Three numerical procedures for cohesive force's EDS determination, Fictitious crack face Loading Method (FLM), Yield stress Loading Method (YLM) and Whole crack face Loading Method (WLM) are proposed. A computation system which carries out EDS determination and fracture mechanics analysis, EDSGI, is developed. Crack Cohesive Force (CCF) model analyses based on FLM, YLM and WLM are performed by EDSGI. The validity of EDSGI is examined by comparing the edge crack's EPFM parameters calculated by FLM, YLM and WLM with the reference solutions evaluated by a direct CCF model analysis. It is found that the EPFM parameters evaluated by FLM agree well with the reference solutions, while YLM overestimates the plastic zone size for large applied stress, and WLM underestimates both plastic zone size and CTOD under the conditions chosen.