准静态载荷作用下螺栓连接CARALL结构的损伤分析  

Damage analysis of bolted CARALL structures under quasi-static loading

作　　者：张林涛 杨涛[1,2] 杜宇 张金童[1] ZHANG Lintao;YANG Tao;DU Yu;ZHANG Jintong(School of Mechanical Engineering,Tiangong University,Tianjin 300387,China;Advanced Mechatronics Equipment Technology Tianjin Area Major Laboratory,Tianjin 300387,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津市现代机电装备技术重点实验室,天津300387

出　　处：《复合材料科学与工程》2023年第10期87-93,108,共8页Composites Science and Engineering

基　　金：天津市自然科学基金(20JCQNJC00050)。

摘　　要：碳纤维增强铝合金层合板(CARALL)是一种较新的纤维金属层压材料。为研究CARALL层合板的螺栓连接性能,采用热压罐固化成型工艺制备试件,对其螺栓连接结构进行准静态拉伸试验。对接头在承受准静态拉伸载荷时的失效过程进行了讨论,失效模式涵盖铝合金塑性变形、碳纤维断裂和界面分层。针对CARALL各层的不同材料成分分别建立失效模型,并采用VUMAT子程序实现了基于三维Hashin失效准则对CFRP层的渐进损伤分析。试验与有限元预测的极限载荷相对误差为8.9%,且所提出的模型能较准确预测试件发生分层失效的位置,证明了该模型能够有效地预测碳纤维增强铝合金层合板单钉螺栓连接结构的力学性能。Carbon fiber reinforced aluminum alloy laminate(CARALL)is a relatively new fiber-metal laminated material.To investigate the bolted joint performance of CARALL laminates,specimens were prepared by the hot press pot method of curing and molding process,and quasi-static tensile tests were conducted on their bolted structures.The failure processes of the joints subjected to quasi-static tensile loads were discussed,and the failure modes covered aluminum plastic deformation,carbon fiber fracture and interface delamination.The failure models were developed separately for different material compositions of each CARALL layer,and the VUMAT subroutine was used to realize the progressive damage analysis of the CFRP layer based on the 3D Hashin failure criterion.The relative error between the experimental and finite element predicted ultimate loads is 8.9%,and the proposed model can predict the location of delamination failure of the specimen more accurately,which proves that the model can effectively predict the mechanical properties of the single-nail bolted structure of the carbon fiber reinforced aluminum alloy laminate.

关 键 词：碳纤维增强铝合金层合板 螺栓连接 有限元模拟 损伤分析 

分 类 号：TB333[一般工业技术—材料科学与工程]