CFRP螺栓连接结构的渐进损伤研究和强度分析

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (3): 44-52.

CFRP螺栓连接结构的渐进损伤研究和强度分析

黄昱翔, 黄向阳, 宋春生^*, 孙成

武汉理工大学机电工程学院,武汉430070

收稿日期:2019-06-12 出版日期:2020-03-28 发布日期:2020-03-28
通讯作者: 宋春生(1981-),男,博导,教授,主要从事隔振、碳纤维复合材料方面的研究,song_chsh@163.com。
作者简介:黄昱翔(1995-),男,硕士,主要从事碳纤维复合材料方面的研究。
本文作者还有刘星宇。
基金资助:
中央高校基本科研业务费专项资金资助(WUT:2018Ⅲ072GX)

PROGRESSIVE DAMAGE STUDY AND STRENGTH ANALYSIS OF CFRP BOLTED JOINTS

HUANG Yu-xiang, HUANG Xiang-yang, SONG Chun-sheng^*, SUN Cheng

School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China

Received:2019-06-12 Online:2020-03-28 Published:2020-03-28

摘要/Abstract

摘要： 为获得CFRP螺栓连接结构的动态损伤过程,采用基于渐进失效的研究方法,确立了拉伸载荷下CFRP螺栓连接结构的失效准则和材料性能退化模型,并在Abaqus Explicit显式分析模块中建立了螺栓连接结构的有限元模型,运用VUMAT子程序进行分析。文章分析了CFRP单螺栓连接结构受拉伸载荷时,5种损伤的扩展过程,并分析了“螺栓-孔”配合间隙对于CFRP单螺栓连接结构强度的影响,还在此基础上提出了CFRP多螺栓连接结构的强度优化方案。结果表明:基于渐进失效方法的有限元准静态分析能有效地模拟CFRP螺栓连接结构的损伤扩展过程;CFRP单螺栓连接结构中,连接强度会随着配合间隙的增大而降低;设置合适的配合间隙使CFRP多螺栓连接结构的整体强度提升了32.1%。

关键词: 螺栓连接, 渐进损伤, 间隙配合, 强度分析

Abstract: In order to obtain the dynamic damage process of CFRP bolted joints, the failure criterion and material degradation model of CFRP bolted joints under tension load are established by using progressive failure method. The finite element model of bolted joints is established in the explicit analysis module of Abaqus Explicit, and analyzed by using VUMAT subroutine. Five kinds of damage extension processes of CFRP single bolted joints under tension load are analyzed, and the influence of bolt-hole fit clearance on the strength of CFRP single bolted joints is analyzed. On this basis, the strength optimization scheme of CFRP multi-bolt connection structure is put forward. The results show that the finite element dynamic analysis based on progressive failure method can effectively simulate the damage propagation process of CFRP bolted joints. The strength of CFRP single bolted joints decreases with the increase of fit clearance, and the overall strength of CFRP multi-bolted joints is increased by 32.1% by setting appropriate fit clearance.

Key words: CFRP, bolted joints, progressive damage, clearance fit, strength analysis

中图分类号:

TB332

黄昱翔, 黄向阳, 宋春生, 孙成. CFRP螺栓连接结构的渐进损伤研究和强度分析[J]. 复合材料科学与工程, 2020, 0(3): 44-52.

HUANG Yu-xiang, HUANG Xiang-yang, SONG Chun-sheng, SUN Cheng. PROGRESSIVE DAMAGE STUDY AND STRENGTH ANALYSIS OF CFRP BOLTED JOINTS[J]. Composites Science and Engineering, 2020, 0(3): 44-52.

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