面外载荷下含孔复合材料点阵夹层结构弯曲强度数值计算方法

发布时间：2018-07-02 11:45

  本文选题：点阵夹层结构 + 开孔率　； 参考：《复合材料学报》2017年10期

【摘要】：通过实验手段和有限元方法针对含孔碳纤维增强树脂基复合材料(Carbon Fiber Reinforced Polymer,CFRP)点阵夹层结构在面外载荷作用下的失效模式及其影响因素进行了研究。首先通过实验获得了含孔CFRP点阵夹层结构的失效模式,其次建立了其有限元渐进损伤失效分析模型,基于该模型对开孔形状、开孔率及开孔位置对结构弯曲强度的影响进行了探讨。结果表明,当面板较厚时,含孔CFRP点阵夹层结构的主要失效模式为节点脱粘和面板皱曲;有限元计算结果和实验结果吻合较好,极限承载力的误差约为9.1%;当开孔率φ1.3%时,CFRP点阵夹层结构的弯曲承载能力与开孔形状基本无关;当开孔率1.3%≤φ8.5%时,含圆形孔夹层结构的弯曲承载能力较大;当开孔率φ8.5%时,含方孔夹层结构的弯曲承载能力较大;当开孔位于点阵夹层结构的几何中心或边缘时,对弯曲承载能力影响较大。
[Abstract]:The failure modes and influencing factors of carbon fiber reinforced polymer (CFRP) lattice sandwich structures under out-of-plane loading were studied by means of experiment and finite element method. First, the failure modes of CFRP lattice sandwich structures with holes are obtained by experiments, and then the finite element progressive failure analysis model is established. The influence of opening ratio and hole position on the bending strength of the structure is discussed. The results show that the main failure modes of CFRP lattice sandwich structures with holes are joint debonding and panel wrinkle when the panels are thick, and the finite element results agree well with the experimental results. The error of ultimate bearing capacity is about 9.1; the bending bearing capacity of CFRP lattice sandwich structure is basically independent of the shape of the opening hole when the opening ratio is 1.3g; when the opening ratio is 1.3% 鈮，

本文编号：2090014