重庆工商大学学报（自然科学版）2025，Vol.42Issue(2)：41-48,8.DOI:10.16055/j.issn.1672-058X.2025.0002.006
裂纹几何约束研究现状分析及挑战
Analysis and Challenges of Current Research on Crack Geometric Constraints
摘要
Abstract
Objective The two-parameter method,which introduces a second parameter(constraint parameter),can more accurately describe the crack tip field in the constrained(especially low-constrained)state than the traditional one-parameter method based on J-integral only.Geometric constraint parameters,as the most important constraint parameters,have been widely investigated in the fields of linear elastic and elastic-plastic fracture mechanics.It is crucial to thoroughly understand the current research and development status of geometric constraint parameters to clarify their challenges and future trends.Methods By summarizing and analyzing literature related to geometric constraints in fracture studies,the current research status of four main geometric constraint parameters(T,Q,A2,A)was analyzed,elucidated,and summarized,including determination of their values(analytical,numerical solution methods,and engineering evaluation methods)and influencing factors(crack type,model geometry,load,and material properties).Results The shortcomings and deficiencies of existing research have been identified.Conclusion Based on this,the challenges faced by research on geometric constraint parameters in obtaining analytical solutions,the influence of multifactor coupling effects,the development of evaluation methods,and different types of cracks are clarified.Additionally,future development directions are analyzed and elucidated,including the impact of loads on constraints,the influence of crack types on constraints,constraint parameter corrections under bending loads,and the relationship between constraint parameters in three-dimensional models.关键词
裂纹约束/约束参数/挑战/发展方向Key words
crack constraint/constraint parameter/challenges/development direction分类
机械工程引用本文复制引用
丁平,屈亮,叶鹏,许磊..裂纹几何约束研究现状分析及挑战[J].重庆工商大学学报（自然科学版）,2025,42(2):41-48,8.基金项目
重庆自然科学基金面上项目(CSTB2023NSCQ-MSX0762) （CSTB2023NSCQ-MSX0762）
重庆工商大学高层次人才项目(1956010) （1956010）
重庆工商大学科研项目(1952043) （1952043）
重庆工商大学研究生创新项目(YJSCXX2023-211-164). （YJSCXX2023-211-164）
