应用经纬互规法建立3D机织复合材料的几何模型  

Geometric modeling of 3D woven composite with warp and fill mutual imitation

作　　者：杨连贺[1,2] 陈利[2] 王善利[1] 

机构地区：[1]天津工业大学计算机学院,天津300387 [2]天津工业大学天津市和教育部共建先进纺织复合材料重点实验室,天津300160

出　　处：《复合材料学报》2012年第3期208-213,共6页Acta Materiae Compositae Sinica

基　　金：教育部博士学科点基金(20091201110003)

摘　　要：采用改进的经纱脉络法表征三维机织复合材料结构,并将单胞分解为亚胞晶阵,提出屈曲形态码概念,并利用编码中蕴含的信息以分段样条曲线拟合纱线中心线;采用经纬纱互相规仿的方法,以分段样条曲线拟合纱线截面轮廓线,进而以解析法建立了预制件的几何模型;将所建模型与电镜照片进行对比,获得了较好的一致性。研究结果表明:可用分段样条曲线描述预制件中纱线的形态;精度相同时,互规法建模效率远高于迭代法。The improved warp skeleton method was used to describe 3D woven composites architecture, and unit cell was decomposed into subcells/grids. The concept of crimp pattern code was put forward, and the yarn centerline could be fitted based on the information contained in the codes. With＂ mutual imitation method＂ of tows, cross-section contour line was fitted by sectioned spline curves. Merging centerlines and contour lines could derive yarnsrcurved surfaces, which were used to create geometric model of a preform. The obtained cross-section shape makes quite good agreement with SEM photoes. The results show that the sectioned spline curves can he used to describe the yarn pattern, and the efficiency of mutual imitation method is significantly higher than that of iteration one under the same precision.

关 键 词：三维机织复合材料 亚胞 样条曲线 互规 纱态 形态码 

分 类 号：TB330.1[一般工业技术—材料科学与工程]