Numerical simulation of damage evolution of bolted connectors considering fretting fatigue effect

IF 1 4区工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY

Journal of the Chinese Institute of Engineers Pub Date : 2023-05-02 DOI:10.1080/02533839.2023.2204911

Ying Wang, Zheng Yan, Yang-Yang Wu, K. Hu

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引用次数: 0

Abstract

ABSTRACT In engineering, the failure of bolted connector is mainly caused by multi-axis non-proportional fretting fatigue damage. A three-dimensional finite element model of bolted connector is established in this paper, and a damage constitutive model suitable for multi-axial fatigue analysis is established based on the critical plane SWT (Smith Watson-Topper) method and continuous damage mechanics theory. A material subroutine UMAT is developed to describe the damage model and realizes the visualization of the damage evolution process caused by the fretting fatigue effect. Based on the test, the validity of the program is verified, the fretting fatigue characteristics and damage evolution characteristics of the bolted connector are analyzed. The results show that (i) the damage evolution analysis method can make up for the deficiency that the critical plane SWT method is only used for simple components and can be applied to the damage evolution analysis and fatigue life evaluation of three-dimensional complex structures. (ii) The crack initiation position of the connecting plate does not change with the magnitude of the tensile load and pre tightening force. In the process of losing the bolt preload from 1 to 0.8 times, the connected parts will be damaged faster as the preload 20 decreases.

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考虑微动疲劳效应的螺栓连接件损伤演化数值模拟

工程中螺栓连接件的破坏主要是由多轴非比例微动疲劳损伤引起的。建立了螺栓连接件的三维有限元模型，基于临界平面SWT (Smith Watson-Topper)方法和连续损伤力学理论，建立了适用于多轴疲劳分析的损伤本构模型。开发了材料子程序UMAT来描述损伤模型，实现了微动疲劳损伤演化过程的可视化。在试验的基础上，验证了程序的有效性，分析了螺栓连接件的微动疲劳特性和损伤演化特性。结果表明:(1)该损伤演化分析方法可以弥补临界平面SWT方法仅适用于简单构件的不足，可应用于三维复杂结构的损伤演化分析和疲劳寿命评估。(ii)连接板的起裂位置不随拉伸载荷和预紧力的大小而变化。在螺栓预紧力从1倍减少到0.8倍的过程中，随着预紧力20的减小，连接件的损坏速度加快。

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来源期刊

Journal of the Chinese Institute of Engineers 工程技术-工程：综合

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

6.8 months

期刊介绍： Encompassing a wide range of engineering disciplines and industrial applications, JCIE includes the following topics: 1.Chemical engineering 2.Civil engineering 3.Computer engineering 4.Electrical engineering 5.Electronics 6.Mechanical engineering and fields related to the above.