A low-cycle fatigue crack growth prediction method for ship stiffened plates considering accumulative plastic damage

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-11 DOI:10.1016/j.tws.2026.114658

Yuelin Song , Zhi Xu , Chenyang Liu , Ziya Peng , Shanyu Xu , Cheng Zhao , Jiping Zhang

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引用次数: 0

Abstract

This research explores the characteristics of low-cycle fatigue crack growth in stiffened plate structures from the perspective of cumulative plastic damage. A novel predictive approach for fatigue crack growth rates is proposed, which integrates a correction factor to account for welding residual stress effects and utilizes accumulated plastic dissipation energy at a critical distance ahead of the crack tip as the driving parameter. The stiffened plate specimen with a central stiffener is fabricated to examine crack propagation behavior, focusing on single-sided and double-sided crack positions relative to the stiffener. A numerical program is developed to simulate simultaneous crack propagation in the plate and stiffener, enabling evaluation of cumulative plastic damage under cyclic stress. The proposed method demonstrates high accuracy in predicting fatigue crack growth rates for welded stiffened plates, as evidenced by strong agreement between predictions and experimental data.

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考虑累积塑性损伤的船舶加筋板低周疲劳裂纹扩展预测方法

本研究从累积塑性损伤的角度探讨加筋板结构的低周疲劳裂纹扩展特征。提出了一种新的疲劳裂纹扩展速率预测方法，该方法综合考虑了焊接残余应力效应的修正系数，并利用裂纹尖端前方临界距离处累积的塑性耗散能作为驱动参数。本文制作了带加劲肋的加筋板试件，主要研究了与加劲肋相对的单面和双面裂纹的扩展行为。开发了一个数值程序来模拟板和加劲板的同时裂纹扩展，从而能够评估循环应力下的累积塑性损伤。该方法对焊接加筋板疲劳裂纹扩展速率的预测具有较高的准确性，预测结果与实验数据吻合较好。

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

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.