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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。
The impact response of unidirectional glass-epoxy composite plate was investigated by analyzing the energy diagrams and load deflection curves, and the failure mode and failure process of the composite plate were discussed. For the comparative analysis, two kinds of composite panels were selected for testing, one of which was [0/90/0/90] s and the other [0/90 / + 45 / -45] s. Based on the comparison of extra energy with the impact energy, an alternative method is proposed to determine the damage threshold. The results show that the damage threshold of composite board is smaller than that of [0/90 / + 45 / -45] s composite board in the stacking order of [0/90/0/90] s; the main damage under high impact energy Mode for the fiber fracture; the other hand, the smaller the impact energy is easy to produce peel and base cracking. At the same time a variety of impact energy under the destruction of contours also described.