提出了四步法三维四向矩形编织复合材料的单胞几何模型,该模型考虑了空间纤维束的相互扭结和挤压而造成的纤维束弯曲和截面形状变化.基于刚度体积平均思想,采用微元段直纤维的单向层板刚度分析方法建立了相应的刚度预报模型,得到了材料的工程弹性常数,数值结果表明了该模型的有效性;分析了工艺参数和纤维束横截面形状对弹性常数的影响规律,得到了一些有益结论.
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