三维四步编织复合材料单元胞体几何模型

概述了三维四步(1×1)编织复合材料几何模型的研究进展,分析了三维四步正规编织过程中纤维束的运动路径及交织方式,提出了一种三维实体单元胞体几何模型,研究了三维编织复合材料单元胞体的几何性,并讨论了纤维束的挤压条件.和传统的几何模型比较,该模型体现了纤维束的连续性,使得各单元胞体之间合理地组装,保证了复合材料整体结构的完整性.

Unit Cell Geometric Model of 4-Step 3-D Braided Composites

After briefly reviewing the proceeding of geometric model of 4-step 3-D (1×1) rectangular braided composites, yarn path in 4-step rectangular braiding process is analyzed. On this basis, a 3-D solid unit cell geometric model is proposed, the characteristics of geometry of 3-D braided composites are studied and yarn-jamming condition is discussed. Compared with conventional geometric models, the identified geometric model reflects the continuity of yarn in 3-D braided composites, which makes each unit cell assembled reasonably, so the structural integrity of 3-D braided composites is assured. The 3-D solid geometric model makes it possible to correctly consider the interactions between yarn and matrix for analysis of effective mechanic behaviors of 3-D braided composites.