摘要
基于Patran/Nastran有限元软件对复合材料层板的挖补补强结构进行细节应力分析,引入Tsai-Hill强度准则和最大剪应力破坏判据预报其压缩强度,通过PCL语言实现了挖补结构的参数化建模并讨论主要修补参数的影响规律.结果表明：强度预报结果与试验结果较好吻合,误差小于10%.复合材料层板在单向和多向载荷作用下的最大挖补角度分别为5°和4°;胶层厚度在满足胶接强度的条件下越小越好,宜为0.10-0.15 mm;挖补修理适用于孔径小于70 mm的损伤.
A 3-D finite element analysis was used to determine the stresses in the scarf patch repaired composite laminates based on a Patran/Nastran. The laminate residual strength was forecasted using Tsai-Hill criterion for laminates and Maximal shear stress criterion for the ad-hesive. The different repaired laminates were modeled as a function of repair parameters using Patran Command Language （PCL）. The results show that predicted strength values coincided with experimental data very well with the error of less than 10%. The optimum scarf angle for laminates is approximately 5° subjected to uniaxial compression and 4° subjected to double axial compression. The best thickness of the adhesive is about 0.10-0.15 mm. The scarf patch repair method is suitable for composite laminates with damaged hole of less than 70 mm.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2008年第5期709-714,共6页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(10672075)
关键词
复合材料结构
挖补
有限元分析
强度
胶接修理
composite structures
scarf patch repair
finite element analysis
strength
bonded repair
