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采用更为合理的分散度系数表达式改进了玻/碳层间混杂复合材料板断裂应变混杂效应系数公式,结合该混杂效应系数公式与复合材料强度混合定律,提出了层间混杂复合材料单向板的拉伸强度预报方法。将该混杂效应系数公式引入复合材料多向板渐近损伤有限元分析模型,修正了低延伸率纤维单层板的拉伸强度值,在此基础上提出了层间混杂复合材料多向板拉伸强度预报方法,并讨论了刚度退化方案。结果表明,模型预报值与实验均吻合较好,尤其考虑混杂效应的预报值与实验情况更加接近;基体退化系数大的刚度退化方案与实验更为吻合。
A more reasonable coefficient of dispersion coefficient was used to improve the strain-effect-mixing effect coefficient formula of glass / carbon interlayer interlaminar composite sheet. Based on the mixed-effect coefficient formula and the mixed law of composite strength, the inter-layer hybrid composite material unidirectional Tensile strength of the board prediction method. The mixed effect coefficient formula was introduced into the asymptotic damage composite multi-directional plate finite element analysis model to modify the tensile strength of low elongation fiber single-layer plate, on this basis, the proposed hybrid multi-layer composite plate pull Tensile strength prediction method, and discusses the stiffness degradation program. The results show that the predicted value of the model is in good agreement with the experiment. In particular, the predicted value of the hybrid effect is closer to the experimental one. The stiffness degradation with large matrix degradation coefficient is in good agreement with the experiment.