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基于单胞解析模型,建立一种从复合材料细观组分到宏观单向板的强度预报方法。根据连续介质力学和均匀化方法构建细-宏观关联矩阵,通过该关联矩阵将细观组分材料的弹性和损伤性能传递到宏观单向板中。考虑复合材料细观损伤状态,当纤维和基体满足各自强度准则时失效,并通过失效因子折算成刚度的衰减。在此基础上,结合有限元分析,实现复合材料单向板纵横向拉伸模拟,从而预报单向板的拉伸强度。结果表明:该方法预报的模量和强度与实验值基本一致,验证了该方法的有效性与高效性。
Based on the single cell analytical model, a method of strength prediction from composite meso-component to macro unidirectional plate was established. According to the method of continuum mechanics and homogenization, a fine-macroscopic correlation matrix is constructed, and the elasticity and damage properties of the mesostructured materials are transferred to the macroscopically unidirectional board. Considering the meso-damage state of the composite material, failure occurs when the fiber and the matrix satisfy the respective strength criteria, and the stiffness factor is reduced by the failure factor. Based on this, combined with the finite element analysis, the longitudinal and transverse tensile simulation of the unidirectional composite plate is realized, and the tensile strength of the unidirectional plate is predicted. The results show that the predicted modulus and intensity of the method are basically consistent with the experimental values, which proves the effectiveness and efficiency of the method.