紧密机织物高气压下面外变形的机制

为指导设计新型防护面料,依据其防护过程,探索了紧密机织物在高气压下面外变形的机制。结合能量理论和板壳理论,建立了紧密机织物在高气压下面外变形的系统能量平衡方程(机制模型),从能量最小化的角度预测织物变形后的最大变形量和变形轮廓曲线。通过自行搭建的织物变形仪测量了2类不同紧密程度的机织物面外变形情况。结果发现织物变形程度与其弹性模量呈负相关性,随后对织物变形的实验值与理论预测值进行了比较,发现二者之间的误差小于20%。从而证明该数学模型可较为精确地用来预测其他紧密机织物高气压下的面外变形。

Out-of-plane deformation of tight woven fabric under high air pressure

For guiding new design on next generation of protective fabrics,the deformation mechanism of tight woven fabric under high air pressure were studied. According to the energy theory and mechanism of plates and shells, the energy balance equation for the out-of-plane deformation of tight woven fabric was established. From the minimum energy of the deformation system, the maximum deformation and deformed profile of fabric could be predicted. The out-of-plane deformation of two tight woven fabrics was measured using a self-developed fabric deformation tester. The comparison shows that the deformation is negatively correlated with the elastic modulus of fabric. The accuracy of the mathematical model is verified by experimental data. The comparison shows the model predictions with difference of less than 20% from experimental data, indicating that the analytical model can be used to predict other out-of-plane deformation of fabrics under high air pressure.