用有限元法预测了二步法三维编织复合材料的有效弹性性能.在二步法方型三维编织复合材料细观结构大单胞模型的基础上,考虑复合材料中纤维束的连续性及其空间的交织效应,用离散杆单元构成的桁架结构有限元模型等效代替复合材料承受单轴拉伸载荷时的受力响应.同时,以轴向拉伸性能测试试样为对象,应用有限元软件包MARC的结构静力分析部分计算了轴向弹性模量和泊松比,数值计算结果与实验结果一致性较好.参数分析结果表明,轴向弹性模量随轴纱与编织纱线密度之比和节距长度的增加呈增加趋势.
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