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本文报道基体韧性对[0_2~0/90_2~0]_2、[90_2~0/0_2~0]_2与[+45_2~0/-45_2~0]_3正交迭层极抗损性能的影响。主要阐述了基体的韧性与三种正交板产生初始损伤的应变值以及损伤发展特征的关系。实验结果表明:基体增韧后,能够增大复合材料单向板横向与45°方向的拉伸变形能力,延缓正交板初始损伤的发生;增加基体材料的韧性,单向板的层间断裂韧性增大,有利于阻止裂缝在正交板中的扩展,延缓分层的发生及减轻损伤程度。
This paper reports the effect of matrix toughness on the ultimate tensile properties of [0_2 ~ 0 / 90_2 ~ 0] _2, [90_2 ~ 0 / 0_2 ~ 0] _2 and [+45_2 ~ 0 / -45_2 ~ 0] _3 orthogonal stack. The relationship between the toughness of the matrix and the initial damage of the three kinds of orthogonal plates and the characteristics of the damage development are mainly described. The experimental results show that: after the matrix toughening, it can increase the tensile deformation capacity of the unidirectional composite plate in the transverse direction and 45 ° direction, delay the initial damage of the orthogonal plate, increase the toughness of the matrix material, and the interlaminar fracture Toughness increases, is conducive to preventing cracks in the orthogonal expansion, delaying the occurrence of stratification and reduce the degree of damage.