Auxetic fabrics are those with a negative Poisson's ratio and have received increasing attention in recent years. In our previous study, a series of auxetic warp-knitted fabrics were developed based on re-entrant geometry and their auxetic effects were experimentally investigated. Unlike weft-knitted fabrics, the preparation and production process of warp-knitted fabrics are very complicated and time consuming. However, finite element (FE) method offers an efficient way to simulate and predict their auxetic behavior without conducting the manufacturing process and experimental tests. Herein, an FE study of auxetic warp-knitted fabric structures is conducted. The FE models are established from the geometry of a real fabric and compared with the experimental results. It is shown that the variation trends of Poisson's ratio agree well between the simulation and experiment. Although simulation results are slightly different from the experimental ones, it still proves feasible for predicting auxetic effects of auxetic fabrics using the FE models. It is expected that this research can offer a useful method to model and simulate the deformation behavior of auxetic warp-knitted fabrics, providing a guide for the design and development of more novel auxetic fabric structures.

中文翻译：

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凹进几何拉胀经编织物的有限元建模

拉胀织物是泊松比为负的织物，近年来受到越来越多的关注。在我们之前的研究中，基于重入几何开发了一系列拉胀经编织物，并对其拉胀效应进行了实验研究。与纬编针织物不同，经编针织物的制备和生产过程非常复杂且耗时。然而，有限元 (FE) 方法提供了一种有效的方法来模拟和预测其拉胀行为，而无需进行制造过程和实验测试。在此，进行了拉胀经编织物结构的有限元研究。有限元模型是根据真实织物的几何形状建立的，并与实验结果进行比较。表明泊松的变化趋势 s 比率在模拟和实验之间非常吻合。虽然模拟结果与实验结果略有不同，但仍然证明使用有限元模型预测拉胀织物的拉胀效应是可行的。预计该研究可为拉胀经编织物的变形行为建模和模拟提供一种有用的方法，为设计和开发更新颖的拉胀织物结构提供指导。