涂层织物类膜材的偏轴梯形撕裂行为

Off axial Trapezoid Tearing Behaviors of Coated Fabrics

关键词:  涂层织物  建筑膜材  梯形撕裂  偏轴  试验  有限元分析

Key words:  coated fabric  membrane material  trapezoid tearing  off axial  test  finite element method(FEM)

摘要:

考虑0°～900°、间隔75°等13个偏轴角度，对6种涂层织物类膜材进行了偏轴梯形撕裂试验.结果表明：各类膜材撕裂强度与偏轴角的关系曲线近似以450°轴对称，0°～450°及900°～450°撕裂强度先减后增，撕裂强度最高点位于450°，最低点位于150°或225°、750°或675°；各类膜材的偏轴梯形撕裂强度同时由纱线强度和纱线断裂伸长率决定.采用Abaqus软件进行的有限元分析能够较好地模拟各类膜材撕裂起始前的荷载位移曲线，所得到的撕裂起始荷载与试验结果较为接近.

Abstract:

The off axial trapezoid tearing tests of six different types of coated fabrics were carried out, mainly considering 13 off axis angles：from 0 to 900° with interval of 75°. The trapezoid tearing strengths of all kinds of membrane materials at different off axis angles were obtained. The results show that the relevent curves of tearing strength of all membrane materials and different off axis are symentrical at 450° angles, from 0 to 450° and from 450 to 900°,the tearing strength firstly decreases and then increases, the maximum tearing strength is achieved at 450°, the minimum value is at 150° or 225° and 750° or 675°; the off axial trapezoid tearing strength was determined by the strength and the breaking elongation of yarns. Abaqus software is used to conduct finite element method(FEM), the displacement curves before the onset of tearing can be simulated by FEM. The result is fits well with those obtained from tests, and the initial loads of tearing obtained by FEM is also close to those obtained by tests.