平均应力对高应力比下裂纹扩展阈值的影响

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL Theoretical and Applied Fracture Mechanics Pub Date : 2024-09-17 DOI:10.1016/j.tafmec.2024.104669

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引用次数: 0

摘要

几十年来，应力比对疲劳裂纹扩展阈值的影响一直是工程材料领域广泛研究的课题。在这项工作中，作为我们之前工作（Engineering Fracture Mechanics 2020, 223:106787）的延伸，提出了一个修正的平均应力修正模型，用于预测高应力比下的长裂纹扩展阈值。此外，还根据所提出的模型推导出了平均应力修正 K-T 图。实验中的长疲劳裂纹扩展阈值和 K-T 图都达到了良好的精度。

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Mean stress effect on crack propagation threshold at high stress ratios

The stress ratio effect on fatigue crack propagation threshold has been a subject of extensive investigation for decades in engineering materials. In the work, a modified mean stress correction model is proposed to predict long crack propagation threshold at high stress ratios as an extension of our previous work (Engineering Fracture Mechanics 2020, 223:106787). Moreover, the mean stress modified K-T diagram is derived based on the proposed model. Good accuracy can be achieved in terms of the experimental long fatigue crack propagation thresholds and K-T diagrams.

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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.