Purpose

Tensile property is one basic mechanics performance of the fabric. In general, not only the tensile values of the fabric are needed, but also the dynamic changing process under the tension is also needed. However, the dynamic tensile process cannot be included in the common testing methods by using the instruments after fabric weaving.

Design/methodology/approach

By choosing the weft yarn and warp yarn in the fabric as the minimum modeling unit, 1:1 finite element model of the whole woven fabrics was built by using AutoCAD software according to the measured geometric parameters of the fabrics and mechanical parameters of yarns. Then, the fabric dynamic tensile process was simulated by using the ANSYS software. The stress–strain curve along the warp direction and shrinkage rate curve along the weft direction of the fabrics were simulated. Meanwhile, simulation results were verified by comparing to the testing results.

Findings

It is shown that there are four stages during the fabric tensile fracture process along the warp direction under the tension. The first stage is fabric elastic deformation. The second stage is fabric yield deformation, and the change rate of stress begins to slow down. The third stage is fiber breaking, and the change of stress fluctuates since the breaking time of the fibers is different. The fourth stage is fabric breaking.

Originality/value

In this paper, the dynamic tensile process of blended woven fabrics was studied by using finite element method. Although there are differences between the simulation results and experimental testing results, the overall tendency of simulation results is the same as the experimental testing results.

中文翻译：

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混纺织物动态拉伸的有限元方法

目的

拉伸性能是织物的基本力学性能之一。通常，不仅需要织物的拉伸值，而且还需要在拉伸下的动态变化过程。但是，在织物编织后使用仪器不能将动态拉伸过程包括在常规测试方法中。

设计/方法/方法

以织物中的纬纱和经纱为最小建模单元，利用AutoCAD软件根据织物的实测几何参数和纱线的力学参数，建立了整个织物的1：1有限元模型。然后，使用ANSYS软件模拟织物的动态拉伸过程。模拟了织物经向的应力-应变曲线和纬向的收缩率曲线。同时，通过与测试结果进行比较来验证仿真结果。

发现

结果表明，在织物的拉伸断裂过程中，沿拉伸方向经向有四个阶段。第一阶段是织物弹性变形。第二阶段是织物屈服变形，应力的变化率开始减慢。第三阶段是纤维的断裂，并且由于纤维的断裂时间不同，因此应力的变化是波动的。第四阶段是面料断裂。

创意/价值

本文采用有限元方法研究了混纺机织物的动态拉伸过程。尽管模拟结果和实验测试结果之间存在差异，但是模拟结果的总体趋势与实验测试结果相同。