复合材料科学与工程Issue(10)：24-31,8.DOI:10.19936/j.cnki.2096-8000.20241028.004
CFRP层合板单搭接胶接接头拉伸失效机制研究
Research on tensile failure mechanism of single lap bonded joint of CFRP laminates
摘要
Abstract
Single lap bonded joint is a common composite material connection method,which has the advantages of high strength and excellent durability.It is widely used in engineering practice,but the failure and damage of sin-gle lap bonded joint are often encountered.In order to further study the failure mechanism of the bonded joint,sin-gle lap bonded joint samples with different lap lengths were prepared,and the load-displacement curves of the joint were obtained by tensile tests with tensioning machines and other equipment.Based on the continuous damage me-chanics model and 3D Hashin failure criterion,a Cohesive unit is selected to simulate the cohesive layer damage,and the damage initiation and evolution of the bonded joint during the whole tensile phase of CFRP laminates is sim-ulated by finite element software.The validity of the simulation results is verified by experimental data.The results show that the failure process of the joint goes from the crack formation of the adhesive layer to the damage initiation of the CFRP layer and then to the cohesive failure of the adhesive layer.Under the action of tensile load,the dam-age area of the joint first occurs at the end of the joint,and then gradually spreads inward.The joint is mainly sub-jected to shear stress and peel stress under type Ⅱ fracture mode,and shear stress is the main cause of damage ini-tiation.关键词
单搭接接头/碳纤维增强塑料/损伤演化/失效机制/应力分布/复合材料Key words
single lap joint/CFRP/injury evolution/failure mechanism/stress distribution/composites分类
通用工业技术引用本文复制引用
陈禹良,张俊,吴何畏,杨柳,李建亭..CFRP层合板单搭接胶接接头拉伸失效机制研究[J].复合材料科学与工程,2024,(10):24-31,8.基金项目
湖北省中央引导地方科技发展专项(2021BGE035) （2021BGE035）
襄阳市科技计划项目(2022ABH006107) （2022ABH006107）
