机织物悬垂屈曲的数值模拟  

Numerical Simulation of Draping and Buckling of Woven Fabric

作　　者：李翠玉[1,2] 张义同[1] 徐家福[1] 

机构地区：[1]天津大学机械工程学院,天津300072 [2]天津工业大学纺织学院

出　　处：《天津大学学报》2007年第1期46-50,共5页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(10272079);中国国家自然科学基金;英国皇家学会资助中英合作项目.

摘　　要：开发虚拟服装试衣系统需模拟织物的悬垂和屈曲,而采用正交异性力学模型不适合织物．为此,笔者基于织物的细观力学模型,用有限元方法来模拟方形织物片铺在圆桌面上的悬垂和屈曲,该细观模型描述了织物由于其细观编织结构而特有的力学性质．织物片用8结点壳单元离散,这种壳单元被特别设计,能描述织物片在悬垂中发生的大转动．对织物片的屈曲模态进行了分析,对其后屈曲变形进行了计算,也进行了方形织物片的悬垂和屈曲实验．模拟结果和实验的观测结果很一致．该研究为虚拟服装试衣系统的开发奠定了基础．To develop a virtual trial system of garments many researches have been devoted to simulations of draping and buckling of woven fabric, but most of them failed because the adopted orthotropic mechanical model is not suitable for woven fabric. With the aid of the micro-mechanical model of woven fabric that characterizes the special properties of woven fabric due to its micro-weaving structure, the draping and buckling of a square woven fabric sheet spreading on a round table were simulated by finite element methods. The fabric sheet was discretized with 8-node shell elements which were specially designed to describe the large rotation of fabric sheet during draping. The buckling modes of the fabric sheet were analyzed, and its post-buckling deformations were evaluated. Experiments were also carried out on the draping and buckling of a square woven fabric sheet. The simulated results are in good agreement with the experimental observations. This work paves the way for developing the virtual trial system of garments.

关 键 词：机织物 悬垂 屈曲 有限元方法 细观力学模型 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]