落锤冲头形状及冲击能量对玻璃纤维层合板动态性能影响研究

Study on the Influence of Drop Hammer Impactor Shape and Impact Energy on Dynamic Properties of Glass Fiber Laminates

纤维增强树脂材料层合板对外来物的冲击非常敏感,为解决其应用隐患,需要研究玻璃纤维增强复合材料层合板低速冲击损伤机理和动态响应特性。本文采用三种头部形状冲头以6种冲击能量进行落锤试验,分析冲击过程中载荷与吸收的能量变化规律。结果表明,冲击能量对层合板损伤形貌与载荷响应影响比较小,而冲头形状对层合板损伤形貌和载荷响应影响较大。冲头形状越钝,层合板的载荷峰值就越大;反之,层合板最大冲击位移和最大冲击时间越长,冲击损伤程度越大。本研究可为复合材料层合板工程应用提供一定的试验基础和参考依据。

Fiber reinforced resin laminates are sensitive to the impact of foreign objects.In order to solve the hidden danger of its application,the low-velocity impact damage mechanism and dynamic response characteristics of glass fiber reinforced composite laminates,drop weight tests are carried out with three kinds of impactor heads and six kinds of impact energy,and the changes of load and absorbed energy during impact are analyzed.The test results show that the impact energy has little effect on the damage morphology and load response curve of laminates,but the shape of the impactor has a great influence on the damage morphology and load response of the laminate.And the load peak value of the laminate is larger as the shape of impactor becomes blunter.Moreover,the maximum impact displacement and maximum impact time is longer,and the impact damage degree is greater as the shape of impactor become sharper.This study can provide some experimental basis and reference for the practical application of composite laminates.