Geometrical model and elastic properties prediction of 2D biaxial braided composites
-
摘要: 提出了二维二轴1×1和2×2编织复合材料的几何模型, 模型考虑了纤维束的相互挤压及横截面的变化。基于细观分析和体积平均法, 建立了预测二维二轴编织复合材料弹性性能的理论分析方法。数值结果与试验结果吻合, 表明该方法行之有效, 且具有运算快、 精度高、 适合工程分析等优点。分析了编织角、 纤维体积含量和纤维束横截面形状对材料弹性常数的影响。研究表明, 编织角对弹性常数的影响具有互补性, 材料弹性模量与纤维体积含量成正比, 纤维束截面形状变化对材料弹性常数影响不大。Abstract: A geometrical model for 2D 1×1 and 2×2 biaxial braided composites was proposed. The jamming condition and the cross-sectional variation of the yarns were considered. Based on the microstructure and volume-averaged method, an analytical model was established to predict the elastic properties of 2D biaxial braided composites. Numerical results show good agreement with the experiment data, which validated the effectiveness of the model. The influences of various parameters such as braid angle, fiber volume fraction and cross-sectional shape of yarns on the effective elastic constants were also studied. The results indicate that the braid angle has a complimentary effect on the elastic constant; the effective modulus is in proportion to fiber volume fraction; cross-sectional shapes of yarns have slight effects on the elastic constant.
-
Key words:
- 2D biaxial braided /
- composites /
- geometrical model /
- elastic constant
-
点击查看大图
计量
- 文章访问数: 2865
- PDF下载量: 852
- 被引次数: 0
下载:
