碳/环氧复合材料的冲击拉伸

该文研究了T300碳纤维单向增强的环氧复合材料,在应变率从10~(-3)/s到10~3/s范围内的冲击拉伸行为.通过对实验数据进行拟合,得出该范围内材料对应变率具有弱的敏感性,表现在破坏强度及破坏应变随应变率增加不显著变化,平均模量几乎不受应变率的影响.分析了试件的几何尺寸效应,讨论了应力波作用对破坏形态的影响以及实验中观察到的拔出现象.从应变率在10~2～10~3/s附近材料行为某些非确定性,指出在更宽范围内了解其性能的必要性.

Corbon/Epoxy Composite Under Impact Tension

Mechanical properties of T300 carbon fibre reinforced epoxy composite areinvestigated under impact tension of strain rates from 10~(-3)/s to 10~3/s.Experimental re-sults and numerical simulation show that the composite is weak sensitive to strain ratesin the studied region.Geometry effect of specimen is analysed and a detailed discussionis given to the action of stress wave on the fracture feature.Depending on the responseof the composite to tensile impact,esp.of strain rates from 10~2/s to 10~3/s,the necessi-ty of studying the composite in a more widespread rate range is suggested.