CFRP层合板双面挖补补片设计及性能分析OA
Design and mechanical property analysis of double-side patch repair for CFRP laminates
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.
张弘强;陈栋;李成
郑州大学机械与动力工程学院,郑州 450001
复合材料层合板有限元分析双面挖补承载性能
composite laminatefinite element methoddouble-sided patchingload-carrying performance
《复合材料科学与工程》 2024 (002)
52-58 / 7
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)
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