利用预应力粘结 Fe-SMA 带阻止钢板疲劳裂纹：分析预测和实验验证

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-01-23 DOI:10.1016/j.tws.2025.112971

Lingzhen Li , Sizhe Wang , Tao Chen , Eleni Chatzi , Hossein Heydarinouri , Elyas Ghafoori

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引用次数: 0

摘要

粘结铁基形状记忆合金（Fe-SMA）加固技术在钢结构疲劳加固方面具有巨大潜力。然而，目前还缺乏一个全面的模型来分析使用预应力粘结铁基形状记忆合金加固系统的疲劳行为。本研究首次提出了将预应力分析和疲劳分析相结合的分析模型，用于预测采用预应力粘结 Fe-SMA 带加固的钢板的疲劳裂纹捕获。使用粘结的 Fe-SMA 带对四块钢板进行了加固，每块钢板都有一条中心贯通裂缝，随后通过加热和冷却产生预应力，在疲劳载荷下进行了测试。所提出的模型成功地预测了 (i) 特定载荷水平下的疲劳裂纹停止和 (ii) 增加载荷水平下的裂纹扩展。

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Arresting fatigue cracks in steel plates using prestressed bonded Fe-SMA strips: Analytical prediction and experimental validation

Bonded iron-based shape memory alloy (Fe-SMA) strengthening has shown great potential in fatigue strengthening for steel structures. However, there is a lack of a comprehensive model for analysing the fatigue behaviour of systems strengthened with prestressed bonded Fe-SMA. This study proposes the first analytical model, integrating a prestress analysis and fatigue analysis, to predict fatigue crack arrest in steel plates strengthened with prestressed bonded Fe-SMA strips. Four steel plates, each featuring a central through-thickness crack, were strengthened using bonded Fe-SMA strips, and subsequently, tested under fatigue loading after generating prestress via heating and cooling. The proposed model succeeded in predicting (i) the fatigue crack arrest at certain load levels and (ii) onset of crack propagation at increased load levels.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.