螺距角对TC4/螺旋复合材料双螺栓斜接接头强度的影响：数值研究

Effect of Pitch Angle on the Strength of a TC4/Helicoidal Composite Double-Bolt Scarf Joint: A Numerical Study.

作者信息

Wan Chunhua, Du Xin, Zhang Guofan, Yu Zhefeng, Lian Xin

机构信息

National Key Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute of China, Xi'an 710065, China.

Aerospace Structure Research Center, School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China.

出版信息

Materials (Basel). 2025 Aug 24;18(17):3956. doi: 10.3390/ma18173956.

DOI:10.3390/ma18173956

PMID:40942382

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12429673/

Abstract

A progressive damage model was developed to study the damage and failure behavior of CFRP/Ti double-bolt scarf joints under quasi-static loading. The three-dimensional Hashin failure criterion was integrated into a finite element model via the ABAQUS user-defined material subroutine. Quasi-static tensile tests were conducted to investigate failure mechanisms and validate the model. The predicted failure modes match the experimental results with an error of 11.8% in the prediction of ultimate load. The effect of helicoidal layup on the composite joint was studied for the application of a helicoidal composite. The results show that the helicoidal layup configuration with a 45/-45 layup on the surface had the highest failure load, and the helicoidal layup introduced more tensile damage in the matrix. This study offers practical failure prediction methods and comprehensive failure mode analysis for composite bolted scarf joints.

摘要

建立了一种渐进损伤模型，以研究准静态载荷下CFRP/Ti双螺栓斜接接头的损伤和失效行为。通过ABAQUS用户定义材料子程序将三维Hashin失效准则集成到有限元模型中。进行了准静态拉伸试验，以研究失效机制并验证该模型。预测的失效模式与实验结果相符，极限载荷预测误差为11.8%。针对螺旋复合材料的应用，研究了螺旋铺层对复合材料接头的影响。结果表明，表面采用45°/-45°铺层的螺旋铺层构型具有最高的失效载荷，且螺旋铺层在基体中引入了更多的拉伸损伤。本研究为复合材料螺栓斜接接头提供了实用的失效预测方法和全面的失效模式分析。