基于渐进损伤模型的热固性复合材料电阻焊接头强度的尺寸效应研究

doi:10.19936/j.cnki.2096-8000.20240228.007

复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (2): 45-51.DOI: 10.19936/j.cnki.2096-8000.20240228.007

基于渐进损伤模型的热固性复合材料电阻焊接头强度的尺寸效应研究

赵艺^1,2, 赵刚^2,3, 范欣愉⁴, 闫忠伟⁴, 葛亚琼¹, 徐剑^2,3*

1.太原科技大学材料科学与工程学院,太原 030024;
2.中国科学院宁波材料技术与工程研究所,宁波 315201;
3.大连理工大学化工学院,大连 116024;
4.沈阳飞机工业(集团)有限公司,沈阳 110850

收稿日期:2023-01-13 出版日期:2024-02-28 发布日期:2024-04-22
通讯作者: 徐剑(1978—),男,博士,教授,研究方向为复合材料应用,xujian1028@dlut.edu.cn。
作者简介:赵艺(1995—),男,硕士,研究方向为复合材料应用。
基金资助:
国家自然科学基金面上项目(52075526);国家自然科学基金(91860204)

Study on size effect of resistance welded joint strength of thermosetting composites based on the progressive damage model

ZHAO Yi^1,2, ZHAO Gang^2,3, FAN Xinyu⁴, YAN Zhongwei⁴, GE Yaqiong¹, XU Jian^2,3*

1. College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2. Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo 315201, China;
3. College of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
4. Shenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, China

Received:2023-01-13 Online:2024-02-28 Published:2024-04-22

摘要/Abstract

摘要： 研究了拉剪载荷下热固性复合材料电阻焊接头强度的尺寸效应,揭示了不同搭接尺寸对焊接强度和焊接界面渐进损伤行为的影响规律。为了研究焊接界面的渐进损伤行为,引入双线性内聚力单元,进而建立焊接接头的有限元模型,然后通过电阻焊接的拉剪试验验证了模型的准确性。在此基础上,建立了不同搭接尺寸的数值模型并对其进行研究。研究结果表明,增大搭接长度或者宽度可以提高接头结构的承载能力,但是当搭接长度较长时,在搭接区域边缘易发生翘曲失效,降低了接头单搭接剪切强度,而宽度则对接头的剪切强度影响很小。

关键词: 复合材料, 电阻焊, 内聚力模型, 有限元分析

Abstract: This paper investigates the size effect of resistance welded heads of thermoset composites on the strength of joints under tensile shear loading, revealing the influence of different lap sizes on the weld strength and the progressive damage behavior of the weld interface. In order to study the progressive damage behavior of the weld interface, a bilinear cohesion unit is introduced, which in turn establishes a finite element model of the welded joint, and then the accuracy of the model is verified by resistance welding in tensile shear tests. On this basis, numerical models with different lap sizes were established and studied. The results showed that increasing the lap length or width can improve the load carrying capacity of the joint structure, but when the lap length is long, warpage failure tends to occur at the edge of the lap area, reducing the single lap shear strength of the joint, while the width has little effect on the shear strength of the joint.

Key words: composite material, resistance welding, cohesive zone model, finite element analysis

中图分类号:

TB332

赵艺, 赵刚, 范欣愉, 闫忠伟, 葛亚琼, 徐剑. 基于渐进损伤模型的热固性复合材料电阻焊接头强度的尺寸效应研究[J]. 复合材料科学与工程, 2024, 0(2): 45-51.

ZHAO Yi, ZHAO Gang, FAN Xinyu, YAN Zhongwei, GE Yaqiong, XU Jian. Study on size effect of resistance welded joint strength of thermosetting composites based on the progressive damage model[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(2): 45-51.

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基于渐进损伤模型的热固性复合材料电阻焊接头强度的尺寸效应研究

Study on size effect of resistance welded joint strength of thermosetting composites based on the progressive damage model

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