Crack path under non-proportional fatigue loading — Evaluating tests with existing crack growth direction criteria

IF 5.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-09-10 DOI:10.1016/j.tafmec.2025.105069

Sjoerd T. Hengeveld , Davide Leonetti , H.H. (Bert) Snijder , Johan Maljaars

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引用次数: 0

Abstract

Proper descriptions of the fatigue crack growth rate and direction are crucial for determining the residual fatigue life of metallic structures. In non-proportional multi-axial loading, the prediction of the fatigue crack growth direction is not trivial. This study evaluates the effect of different state-of-the-art crack growth direction criteria on the predicted crack paths by comparing the results with experiments with non-proportional load done by others. The results are compared in terms of predicted angles at different experimental crack lengths and cumulative predicted crack path. Based on this study, it is concluded that none of the studied criteria based on linear elastic fracture mechanics is able to accurately predict the crack growth direction in non-proportional loading for the general case. The mismatch of some cases studied is so large that these criteria cannot be used in crack growth path prediction for an arbitrary, non-proportional load case.

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非比例疲劳载荷下的裂纹路径。用现有裂纹扩展方向准则评价试验

正确描述疲劳裂纹扩展速率和方向对确定金属组织的剩余疲劳寿命至关重要。在非比例多轴载荷下，疲劳裂纹扩展方向的预测是非常重要的。通过与非比例荷载试验结果的比较，评价了不同裂纹扩展方向准则对预测裂纹路径的影响。比较了不同实验裂纹长度下的预测角和累积预测裂纹路径的结果。研究表明，对于一般情况下，基于线弹性断裂力学的准则均不能准确预测非比例加载下的裂纹扩展方向。研究的一些情况下的不匹配是如此之大，这些准则不能用于裂纹扩展路径预测的任意，非比例载荷情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.