| 引用本文: | 丁 平1,2 ,屈 亮1,2 ,叶 鹏1,2 ,许 磊1,2.裂纹几何约束研究现状分析及挑战(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2025，42（2）：41-48 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 裂纹几何约束研究现状分析及挑战 |
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丁 平1,2 ,屈 亮1,2 ,叶 鹏1,2 ,许 磊1,2
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1. 重庆工商大学,机械工程学院,重庆 400067
2. 智能装备绿色设计与制造重庆市重点实验室,重庆 400067
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| 摘要: |
| 目的 较之于仅基于 J 积分的传统单参数方法,引入第二个参数( 约束参数) 的两参数法可更精确描述约束
( 特别是低约束) 状态下的裂尖场。 几何约束参数作为最主要的约束参数在线弹性及弹塑性断裂力学领域得到广
泛研究。 深入理解几何约束参数的研究和发展现状、从而明确其面临的挑战及未来发展趋势至关重要。 方法 通过
归纳和分析断裂研究中几何约束相关文献,对四个主要几何约束参数( T、Q、A2 、A) 的研究现状进行分析、阐述和总
结,包括其值的确定( 解析、数值求解方法和工程评估方法) 及影响因素( 裂纹类型、模型几何尺寸、载荷及材料性
能) 等两个主要方面。 结果 探明了现有研究的缺乏和不足之处。 结论 基于此,明确了几何约束参数在解析解的获
得、多因素耦合效应的影响、评估方法的发展及不同裂纹类型等方面研究所面临的挑战;同时,分析并阐明了相关
研究在载荷对约束影响、裂纹类型对约束影响、弯曲载荷下约束参数修正及三维模型中约束参数间关系等主要方
面的未来发展方向。 |
| 关键词: 裂纹约束 约束参数 挑战 发展方向 |
| DOI： |
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| Analysis and Challenges of Current Research on Crack Geometric Constraints |
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DING Ping1 2 QU Liang1 2 YE Peng1 2 XU Lei1 2
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1. School of Mechanical Engineering Chongqing Technology and Business University Chongqing 400067 China
2. Chongqing Key Laboratory of Green Design and Manufacturing of Intelligent Equipment Chongqing 400067 China
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| 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 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 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 futuredevelopment 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. |
| Key words: crack constraint constraint parameter challenges development direction |
