收稿日期: 2018-03-20
网络出版日期: 2019-09-04
基金资助
国家自然科学青年基金资助项目(11602193);大连理工大学工业装备结构分析国家重点实验室开放基金资助项目(GZ1709);南京航空航天大学机械结构力学及控制国家重点实验室开放课题资助项目(MCMS-0517G01);江苏省高校自然科学研究基金面上资助项目(16KJB460021)
Failure behavior for composite bolted joints
Received date: 2018-03-20
Online published: 2019-09-04
螺栓连接是复合材料层合板结构最普遍的连接方式, 但连接处通常也是结构中较为薄弱的部分. 为了保证航空结构的安全性, 对复合材料螺栓连接结构进行失效载荷评估尤为重要. 基于Hashin失效准则, 以复合材料单钉沉头螺栓连接结构为研究对象, 建立了螺栓连接接头失效行为的3D有限元(finite element, FE)失效预测模型. 基于Abaqus, 用Fortran语言二次开发了UMAT用户自定义程序. 针对接触面摩擦系数、螺栓-孔间隙以及螺栓预紧力等影响因素进行参数化研究, 分析了这些参数对复合材料螺栓连接结构中失效载荷的量化影响, 并与实验结果进行比对, 为连接结构提供了安装设计依据.
关键词： 螺栓连接; 复合材料; 失效载荷; Hashin失效准则
唐旭辉, 张顺琦, 应申舜, 陈敏 . 复合材料螺栓连接结构的失效行为[J]. 上海大学学报(自然科学版), 2019 , 25(4) : 502 -515 . DOI: 10.12066/j.issn.1007-2861.2049
Bolt joints are the most commonly used connections, but they are often the weakest part in those structures. Therefore, to ensure the safety of aircraft structures, evaluating failure load in composite bolted joint is necessary. Based on Hashin failure criteria, a 3D finite element (FE) model of a composite single-lap countersunk bolted joint was developed to study the damage effects. Numerical analysis was conducted by employing UMAT which was developed from Fortran Language and implemented via Abaqus. Based on the parametric studies of coefficient of friction, bolt-hole clearance and bolt load, the impact of parameters on the failure load of composite bolted joint was analyzed, and numerical results were compared with experimental results, to provide the reference for the installation and design of composite bolted joints.
Key words： bolted joints; composite materials; failure load; Hashin failure criteria
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