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含纤维束截面形状变化的三维编织复合材料细观模型及刚度预报

, PP. 187-196

Keywords: 三维编织,复合材料,纤维束横截面,几何模型,弹性常数

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Abstract:

基于实验观察和理论研究,重点分析了材料内部区域纤维束的空间构型,建立了一个新的三维实体细观结构模型,并指出了编织工艺参数和模型细观结构参数之间的关系。该模型较真实地反映了纤维束之间的相互挤压变形方式,纤维束横截面积沿纤维束轴向不断变化,更符合三维四向编织复合材料的实际结构。基于刚度体积平均及柔度体积平均混合思想,建立了相应的刚度预报模型。用该模型计算编织复合材料几何特性及工程弹性常数的数值结果与试件实测数据吻合,表明了该模型的合理有效性,为进一步研究三维编织复合材料的拉伸强度及破坏机制提供了基础。

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