多向载荷下PVC/双轴向经编织物的开缝撕裂性能

柔性复合材料在日常使用过程中常常受到多向拉伸载荷的作用，而且在有小裂缝的情况下还会继续使用。为了解具有小裂缝的PVC/双轴向经编织物在多轴向拉伸载荷下的力学行为，分别针对不同形状、不同初始开缝长度及不同初始开缝角度试样在多轴向拉伸载荷下的开缝撕裂情况进行了观察与分析。结果表明：当试样采用圆形时，撕裂曲线表现出较强的各向同性，即使在偏轴方向没有增强纱线时，偏轴方向呈现较强的承担负荷能力；撕裂强力随初始开缝长度的增加而降低；初始开缝角度的影响取决于开缝方向与拉伸方向的相对位置。

Precracked tearing properties of PVC/ biaxial warp knitted fabric under multiaxial loads

In order to gain some insight into the precracked tearing behavior of biaxial warp knitted fabric coated with PVC under multiaxial tensile loads,the influences of the shape and size of sample,the precracked length and direction under multiaxial loads are observed and analyzed.The results show that the fabric has rather isotropic behavior while the sample is round.Better loads bearing ability is exhibited at the deflection direction even without reinforcing yarns at that direction.It has also found that the ...