Ultimate bearing capacity and fatigue life analysis of marine sandwich composite bolted connection structure: Fatigue test and numerical simulation

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2024-12-28 DOI:10.1016/j.marstruc.2024.103770

Yu Qiu , RenJun Yan , Jiajing Lei , Gongrong Li , Wei Shen , Yaoyu Hu

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引用次数: 0

Abstract

Because of the great difference in performance between component materials, there are some problems in sandwich composite structures, such as complex fatigue failure mode and difficult observation of internal damage. The numerical simulation method of fatigue can effectively simulate the whole process of fatigue failure. At present, the fatigue failure prediction methods of reinforced fiber laminates and interlayer interfaces are effectively analyzed, but there is no relevant numerical simulation method that can consider the fatigue failure of core materials. Based on the fatigue test data of foam core materials, an improved fatigue life prediction method of foam core material with principal stress and Tresca stress as basic parameters is proposed, and a progressive failure fatigue analysis method of foam sandwich composite structure is formed by combining the stiffness/strength degradation model of fiber reinforced laminates and Shokrieh fatigue failure criterion. Based on the finite element calculation software ABAQUS, the corresponding UMAT subroutine is compiled and the fatigue life and damage mode prediction of the sandwich composite bolted connection structure are verified. Compared with the experimental results, it can be found that the proposed finite element fatigue analysis method has high calculation accuracy and can be used to guide the anti-fatigue design and optimization of sandwich composite structures.

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船用夹层复合材料螺栓连接结构极限承载力与疲劳寿命分析：疲劳试验与数值模拟

由于夹层复合材料的性能差异较大，存在疲劳破坏模式复杂、内部损伤观察困难等问题。疲劳数值模拟方法可以有效地模拟疲劳破坏的全过程。目前，对增强纤维层合板和层间界面的疲劳失效预测方法进行了有效的分析，但没有相关的数值模拟方法可以考虑芯材的疲劳失效。基于泡沫芯材疲劳试验数据，提出了一种以主应力和Tresca应力为基本参数的改进泡沫芯材疲劳寿命预测方法，并将纤维增强层合板刚度/强度退化模型与Shokrieh疲劳失效准则相结合，形成了泡沫夹层复合材料结构递进式失效疲劳分析方法。基于有限元计算软件ABAQUS，编制了相应的UMAT子程序，并对夹层复合材料螺栓连接结构的疲劳寿命和损伤模式预测进行了验证。通过与试验结果的比较，可以发现所提出的有限元疲劳分析方法具有较高的计算精度，可用于指导夹层复合材料结构的抗疲劳设计与优化。

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

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.