一种新的非共线平行双裂纹合并准则

doi:10.3901/JME.2025.24.148

机械工程学报 ›› 2025, Vol. 61 ›› Issue (24): 148-157.doi: 10.3901/JME.2025.24.148

• 材料科学与工程 • 上一篇

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一种新的非共线平行双裂纹合并准则

刘红侠¹, 王骁晓², 崔元元³, 刘芳³, 杨杰¹, 陈浩峰²

1. 上海理工大学能源与动力工程学院上海 200093;
2. 华东理工大学承压系统与安全教育部重点实验室上海 200237;
3. 上海理工大学机械工程学院上海 200093

收稿日期:2025-01-08 修回日期:2025-08-11 发布日期:2026-01-26
作者简介:刘红侠，女，1998年出生。主要研究方向为机械强度。E-mail：18456775157@163.com
杨杰(通信作者)，男，1987年出生，博士，教授，博士研究生导师。主要研究方向为机械结构的损伤、疲劳与断裂等。E-mail：yangjie@usst.edu.cn
基金资助:
国家自然科学基金资助项目(52375154，52311530067)。

New Coalescence Criterion for Non-collinear Parallel Double Cracks

LIU Hongxia¹, WANG Xiaoxiao², CUI Yuanyuan³, LIU Fang³, YANG Jie¹, CHEN Haofeng²

1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093;
2. Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237;
3. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093

Received:2025-01-08 Revised:2025-08-11 Published:2026-01-26

摘要/Abstract

摘要： 为了对多裂纹进行准确的结构完整性评定，处理好裂纹间的相互作用是关键，这就需要根据合并准则对相邻裂纹进行判断，如果相邻裂纹满足合并准则，则将其合并成为一条裂纹进行评定；否则，将按照单裂纹分别进行评定。然而，各个国家所制定的合并准则不尽相同，当用不同的合并准则进行判断时会得到不同的结果。为了构建更加精确的双裂纹合并准则，以含非共线平行双裂纹均质平板为研究对象，采用试验和有限元数值模拟相结合的方法，针对非共线平行双裂纹的合并情况展开研究。进一步，将试验结果、有限元数值模拟结果与各国合并准则所得结果进行对比，指出了目前合并准则中的不足。并基于双裂纹水平距离与双裂纹长度平均值的比值、双裂纹垂直距离与较短裂纹的比值，提出了一种新的双裂纹合并准则。

关键词: 合并准则, 双裂纹, 试验, GTN损伤模型

Abstract: To accurately assess the structural integrity of multiple cracks, effectively addressing the interactions between cracks is crucial. This requires evaluating adjacent cracks based on the coalescence criterion：if adjacent cracks satisfy the criterion, they are merged into a single crack for assessment; otherwise, they are assessed separately as individual cracks. However, the coalescence criteria established by different countries vary, leading to divergent results when different criteria are applied. To develop a more precise coalescence criterion for double cracks, this study investigates the coalescence behavior of non-collinear parallel double cracks in homogeneous plates using a combined experimental and finite element numerical simulation approach. The experimental and numerical simulation results are compared with those derived from various international coalescence criteria, highlighting the limitations of existing standards. Based on the ratio of the horizontal distance between the double cracks to the average length of the cracks, and the ratio of the vertical distance to the length of the shorter crack, a new coalescence criterion for double cracks is proposed.

Key words: coalescence criterion, double cracks, experiment, GTN damage mode

中图分类号:

TH114

刘红侠, 王骁晓, 崔元元, 刘芳, 杨杰, 陈浩峰. 一种新的非共线平行双裂纹合并准则[J]. 机械工程学报, 2025, 61(24): 148-157.

LIU Hongxia, WANG Xiaoxiao, CUI Yuanyuan, LIU Fang, YANG Jie, CHEN Haofeng. New Coalescence Criterion for Non-collinear Parallel Double Cracks[J]. Journal of Mechanical Engineering, 2025, 61(24): 148-157.

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一种新的非共线平行双裂纹合并准则

New Coalescence Criterion for Non-collinear Parallel Double Cracks

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