| 四步法三维编织复合材料细观结构分析 |
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| 引用本文： | 郑锡涛,叶天麒. 四步法三维编织复合材料细观结构分析[J]. 中国航空学报, 2003, 16(3): 142-150. DOI: 10.1016/S1000-9361(11)60175-1 |
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| 作者姓名： | 郑锡涛 叶天麒 |
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| 作者单位： | Aircraft Department，Aircraft Department Northwestern Polytechnic University，Xi′an 710072，China，Northwestern Polytechnic University，Xi′an 710072，China |
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| 基金项目： | Aeronautical Science Foundation of China ( 99B2 3 0 0 1) |
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| 摘 要： | 分别通过实验与控制体积方法系统地研究了采用四步法 1× 1方型编织工艺编织的预成形件的纱线结构。提出了纱线椭圆形横截面假设 ,考虑了编织纱线的细度和编织纱线填充因子的影响。根据编织过程中携纱器的运动轨迹特点 ,将预成形件划分为内部、表面和棱角 3个不同的区域 ,分别定义了不同的控制体积单元 ,识别了预成形件的两种局部单胞模型 ,分析了预成形件的纱线构造 ,并导出了编织结构参数之间的关系。为编织复合材料的刚度、强度性能分析提供了充分的条件。
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| 关 键 词： | 四步法 复合材料 编织工艺 纱线 刚度 强度 |
| 收稿时间： | 2003-04-09 |
Microstructure Analysis of 4-Step Three-Dimensional Braided Composite |
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| ZHENG Xi-tao,YE Tian-qi. Microstructure Analysis of 4-Step Three-Dimensional Braided Composite[J]. Chinese Journal of Aeronautics, 2003, 16(3): 142-150. DOI: 10.1016/S1000-9361(11)60175-1 |
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| Authors: | ZHENG Xi-tao YE Tian-qi |
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| Affiliation: | Aircraft Department, Northwestern Polytechnic University, Xi''an 710072, China |
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| Abstract: | The yarn architecture of 3-D braided composites products by the four-step 1 × 1 braiding technique has been studied by means of a control volume method in conjunction with experimental investigation and a numerical method, respectively. An ellipse assumption for the cross-section of yarn was proposed in this analysis method with considering the yarn size and yarn-packing factor. Two types of local unit cell structures were identified for 4-step braided composites by considering the nature of the braiding processes and by observing the sample cross-sections. The relations hip between the braiding procedure and the properties for 3-D braided structural shapes was established. This method provides the basis for analyzing stiffness and strength of 3-D braided composites. |
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| Keywords: | composites 3-D braided fabrics unit cell microstructure packing factor |
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