通过小冲压试验确定结构钢的疲劳特性：方法的开发

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-24 DOI:10.1016/j.tafmec.2024.104772

S. Otero, G. Álvarez, M.M. Llera, C. Rodríguez

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引用次数: 0

摘要

了解材料的疲劳特性是安全设计结构的基础。标准化测试可用于此目的，但其应用需要大量材料，而在许多情况下，这些材料是不可用的。为了解决这个问题，使用微型试验是最佳解决方案。这项研究分析了小冲压试验（SPT）在表征结构钢疲劳行为方面的应用。为此，我们开发了一种实验方法，不仅可以分析 SPT 疲劳损伤的起始位置和扩展方式，还可以分析其与试样顺应性变化之间的关系。基于这种方法，我们获得了两种结构钢的不同 SPT-N 等损伤曲线和 SPT 疲劳极限。通过将这些结果与旋转梁疲劳试验得出的结果进行比较，提出了 SPT 和旋转梁疲劳试验得出的疲劳极限之间的简单关联。

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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Fatigue characterisation of structural steel by means of the small punch test: Development of a methodology

Knowledge of the fatigue behaviour of materials is fundamental to the safe design of structures. Standardised tests are used for this purpose, but their application requires a considerable amount of material, which in many cases is not available. To overcome this problem, the use of miniature tests would be the optimal solution. This work analyses the application of the Small Punch Test (SPT) to characterise the fatigue behaviour of structural steels. To this end, an experimental methodology has been developed to analyse not only where SPT-fatigue damage initiates and how it propagates, but also its relationship with changes in specimen compliance. Based on this methodology, different S_PT-N iso-damage curves and the SPT-fatigue limit have been obtained for two structural steels. By comparing these results with those obtained from rotating beam fatigue tests, a simple correlation has been proposed between the fatigue limits obtained from SPT and rotating beam fatigue tests.

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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.