摘要
基于三维Hashin准则,借助有限元方法(FEM),建立了复合材料层合板双面挖补修补模型。引入一种只挖去破损部位,留下有锥度的孔但未覆盖胶层及补片的挖补模型,分别论述修补效果中挖补后母板的剩余强度和胶层补片提升的强度,得到了双面挖补修理的损伤过程和最佳挖补角度。结果表明:双面挖补拉伸强度恢复率为50%~80%,能够通过更小的挖补面积实现与单面挖补相同的修复效果,对母板的损伤更少,适用场景更多;双面挖补修理效果随着挖补角度的增大先增大后减小,在挖补角度为6°时修补效果最佳,强度恢复率达到78%;采用T300/7901材料作为母板和补片材料,通过试验验证了试件失效载荷与有限元模拟结果吻合良好,误差率小于15%,可以证明建模的正确性。
Based on the three-dimensional Hashin criterion and with the help of finite element method(FEM),a two-sided patching repair model of composite laminates was established.A patching model with damaged part re-moved but without the adhesive layer is introduced.Residual strength of the mother plate with and without patch are compared,and the damage process and the best patching angle of double-sided patching repair are also obtained.The results show that the recovery rate of tensile strength with double-side patch is between 50%and 80%,which can achieve the same repair effect as that of single-sided patching through a smaller patching area,which means less damage to the main plate and more applicable scenarios.The repair effect of double-sided patching first increa-ses and then decreases with the increase of patching angle.When the patching angle is 6°,the repair effect is the best,and the strength recovery rate reaches 78%.The main plate and patch material for experimental verification are prepared from T300/7901 material.The failure load of the test specimen shows good agreement with the FEM re-sults,and the relative error is less than 15%,which can prove the correctness of the modeling.
作者
张弘强
陈栋
李成
ZHANG Hongqiang;CHEN Dong;LI Cheng(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《复合材料科学与工程》
CAS
北大核心
2024年第2期52-58,共7页
Composites Science and Engineering
基金
国家自然科学基金(52175153)
河南省水下智能装备重点实验室开放基金(ZT22064U)。
关键词
复合材料层合板
有限元分析
双面挖补
承载性能
composite laminate
finite element method
double-sided patching
load-carrying performance
