摘要
采用阶梯挖补法对四种不同铺层方向的复合材料层合板进行修补,测试挖补后层合板的拉伸性能。通过对失效后断口形貌的表征,分析层合板阶梯挖补结构的失效形式,获知其失效形式为纤维和基体的脱粘。分析四种不同铺层方式修补的复合材料层合板母板、补片和胶层的应力分布。结果表明,铺层方式对母板、补片和胶层上的应力分布影响很大,应力主要集中分布在0°方向铺层上,阶梯挖补界面阶梯拐角处应力分布跳跃很大。
The composite laminates with four different lay-up sequences were repaired by step-lap repair.tensile properties were tested.A 3D finite element model was developed for the progressive damage analysis on step-lap repair of composite laminates.The tensile strength was predicted and the results show that the numerical simulation results are in good agreement with the experimental data.The fracture morphology were observed using SEM.The types of the fracture are mainly debonding between fiber and matrix.The stress distribution on the laminate,patch and adhesive of the repaired composite laminates with four different lay-up sequences were analysed.The results show that the different lay-up sequence has a great influence on stress distribution in matrix,patch and adhesive.The stress is mainly concentrated in the layers of 0° plies and on corner of step jumps greatly.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2013年第6期62-69,共8页
Journal of Aeronautical Materials
关键词
复合材料层合板
阶梯挖补
铺层方式
有限元模拟
应力分布
composite laminates
step-lap repair
lay-up sequence
finite element simulation
stress distribution
作者简介
李娜（1979-）,女,博士研究生,主要从事树脂基复合材料研究,（E-mail）nli@cauc.edu.cn
刘阔（1988-）,男,硕士研究生,主要从事复合材料力学研究,（E-mail）kliu@cauc.edu.cn.
