纺织织物力学性能描述与悬垂特性分析

【作者】 魏涛；

【导师】 郭乙木；

【作者基本信息】 浙江大学 ， 固体力学， 2003， 硕士

【摘要】 纺织力学研究是固体力学的一门新兴研究方向，无论在理论分析还是实验研究中，都有许多问题有待于解决。本文对这一问题进行初步的探索性研究，主要进行了以下3方面工作： (1)系统介绍了纺织织物复合材料的组成结构，并论证得出了不同层次间的关系及各个层次的基本力学模型。给出纤维，纱线，织物在外载荷下的力学响应行为。 (2)给出了织物悬垂特性的基本描述和力学，数学模型，并通过非线性有限元计算得出了与实测结果吻合较好的结果。同时讨论了不同参数情况下，影响织物悬垂性能的因素，为服装三维CAD的成功应用提供了理论依据。 (3)首次引入了威布尔随机分布来描述织物中复杂变量的关系，同时详细讨论了由纱线间相互作用引起的织物增强效应的力学原理，给出了更加合理的织物单双轴拉伸时的应力—应变曲线，并分类讨论了纱线横截面几何参数，临界长度，编织结构等因素对拉伸时纺织织物力学行为的影响关系。更多还原

【Abstract】 Textile Composites mechanics research is a new directions of Solid Mechanics. There still do exist many questions unsolved both in theory or experiment. In this paper, only the tentative research has been done, there are 3 main research work for the topic:(1) Introduce the basic structure of textile composites in detail systemically. The mechanical model for main layer structure of textile composites is proved and given reasonably. The behavior under external loads of fabric, yarn, fiber is also studied in detailed.(2) The theory mechanical and mathematics model for draping behavior of textile composites is given, through computation using non-linear FEM, the result is acceptable compare with the experiment. Moreover, discussed several parameters that influence the draping behavior directly according to the problem. The result can be used as a basic theory of 3 dimensions dress CAD design.(3) Weibull probability function was used to describe the complex parameters for the first time that influence the mechanical behavior of textile composites under external loads. Especially the mechanical models of the inter-actions between yarns that will reinforce the tensile strength of fabric were discussed in detail. A more realty stress-strain curve of textile composites under uniaxial and biaxial tension is provided under this model. Further more, here we discussed the geometric parameter of yarn cross-section, critical length, woven structure and other factors in detail.更多还原