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对单向和多向混杂纤维复合材料的拉伸刚度进行了研究。在混合定律的基础上考虑混杂比和分散度对混杂效应的影响,提出了单向混杂纤维复合材料拉伸模量的估算公式。通过实验得到了多向混杂纤维复合材料的拉伸模量,并且采用经典层合板理论进行了估算,基于混杂比以及分散度对拉伸模量的影响规律,对多向混杂纤维复合材料拉伸模量的估算公式进行了修正。结果表明:混杂纤维复合材料的拉伸模量与混杂比和分散度相关,分散度的增大在一定程度上可以提高单向混杂纤维复合材料的纵向拉伸模量。采用经典层合板理论所得的拉伸模量与实验值有一定的误差,而本文所提出的公式能够更加准确地估算混杂纤维复合材料的拉伸模量。
The tensile stiffness of unidirectional and multi-directional hybrid fiber composites was studied. On the basis of the law of mixing, the effect of mixing ratio and dispersion on the confounding effect is considered. The formula for calculating the tensile modulus of unidirectional hybrid fiber composites is proposed. The tensile modulus of multi-directional hybrid fiber composites was obtained through experiments and was estimated by classical laminate theory. Based on the influence of mixing ratio and dispersion on tensile modulus, the tensile properties of multi-directional hybrid fiber composites The modulus estimation formula was revised. The results show that the tensile modulus of hybrid fiber composites is related to the mixing ratio and dispersion degree. The increase of dispersion degree can improve the longitudinal tensile modulus of unidirectional hybrid fiber composites to a certain extent. The tensile modulus obtained by the classical laminate theory has some errors with the experimental values, and the formula proposed in this paper can more accurately estimate the tensile modulus of the hybrid fiber composites.