横向冲击下双轴向经编玻璃纤维板的力学性能

采用MTS材料试验机和Hopkinson压杆,测试横向冲击下双轴向经编玻璃纤维织物增强不饱和聚酯树脂复合材料的静动态力学性质,得出准静态加载和动态冲击下载荷与位移曲线、材料破坏模式及能量吸收位移曲线.研究结果表明,整个准静态横向加载过程可分为2个阶段,即上升阶段和下降阶段.在准静态横向加载下,材料缓慢变形,是整体结构的...

Mechanical properties of bi-axial warp knitted glass fiberboard under transverse impact

MTS testing machine and Hopkinson pressure bar were used to test the mechanical properties of reinforced composites with bi-axial warp knitted glass fiber fabric and unsaturated polyester resin under transverse impact. The load-displacement curves, failure modes and energy absorption-displacement curves under quasi-static transverse load and dynamic transverse impact were obtained. The results showed that the entire quasi-static transverse loading process can be divided into two stages, namely the rise and fall phase stages, and the deformation of samples was the overall structure response under quasi-static transverse load. At the same time, the displacement and load increased with the increase of impact velocity under dynamic transverse impact, but the displacement has "hysteresis" phenomenon. During the dynamic transverse impact process, stress wave transmitted very quickly and the samples showed partial destruction and stratified.