复合板冲击响应试验研究

通过分析能量图和荷载挠度曲线,对单向玻璃-环氧复合板冲击响应进行试验研究,探讨了复合板的破坏模式和破坏过程。为进行对比分析,选择两种复合板进行试验,一种铺层顺序为[0/90/0/ 90]s,另一种为[0/90/+45/-45]s。基于额外能与冲击能的对比,提出可选择的方法确定破坏阈值。研究发现:铺层顺序为[0/90/+45/-45]s复合板的破坏阈值小于堆积顺序为[0/90/0/90]s复合板的破坏阈值;高冲击能下主要破坏模式为纤维断裂;反之,较小冲击能时易产生剥离和基底开裂。同时对多种冲击能下破坏区的等高点也进行了描述。

An Experimental Investigation of the Impact Response of Composite Laminates

In this study,the impact response of unidirectional glass/epoxy laminates has been investigated by considering energy profile diagrams and associated load-deflection curves.Damage modes and the damage process of laminates under varied impact energies are discussed.Two different stacking sequences,[0/90/0/90]s and[0/90/+ 45/-45]s,were chosen in tests for comparison.An alternative method,based on variation of the excessive energy (E_e) versus impact energy(E_i),is presented to determine penetration threshold(...