垂直度误差影响复合材料层合板层间应力分析  

Effect of Hole Perpendicularity Error on Inter-laminar Stress of CFRP

作　　者：刘学术[1] 杨宇星[2] 鲍永杰[2] 高航[2] 李汝鹏 

机构地区：[1]大连理工大学汽车工程学院,大连116023 [2]大连理工大学机械工程学院,大连116023 [3]上海飞机制造有限公司,上海200120

出　　处：《机械科学与技术》2018年第1期138-147,共10页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家重点基础研究发展计划项目(2014CB046504);国家自然科学基金项目(51375068;51475073)资助

摘　　要：采用有限元仿真的方法分析了连接孔垂直度误差对连接区层间应力的影响规律,基于层间失效准则对垂直度误差影响接力学性能进行了预测并试验验证。结果表明:垂直度误差影响螺栓与连接件之间的接触关系,造成连接区应力分布不均匀;螺栓在带有垂直度误差的连接孔中预紧时会发生位姿调整,其中以螺栓杆挤压孔壁为主;层间剪应力随垂直度误差的增加而增大,是造成分层失效的主要原因;适当提高螺栓预紧力有利于缓解垂直度误差带来的不良影响。The effects of the hole-perpendicularity error on the inter-laminar stress and the mechanical performance ~s distribution around the hole is heavily affected by the s fastened in a bolt hole with perpendicularity error, during important role. Moreover, the inter-laminar shear stress of the joint are investigated. It is found that the stres mentioned error. The bolt＇s posture may adjust when it i which the bolt shank bearing the hole wall plays an increases with the increasing of hole perpendicularity error, which is the main reason for inducing delamination failure. Finally, to increase perpendicularity error, which the fastening torque can help to reduce the negative effects caused by hole was proved by the experimental resuhs.

关 键 词：复合材料 螺栓连接 分层 垂直度误差 层间应力 

分 类 号：TB330.1[一般工业技术—材料科学与工程] TB332