Dynamic mechanical Response of two fiber-reinforced composites
作者单位：School of AeronauticsNorthwestern Polytechnical University
会议名称：《The 16th Annual Conference of Hong Kong Society of Theoretical and Applied Mechanics 2012、The 1st Mainland-Hong Kong Youth Forum on Mechanics 2012、The 8th Shanghai-Hong Kong Forum on Mechanics and Its Application 2012》
会议日期：2012年
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
关 键 词：Dynamic mechanical Response of two fiber reinforced composites
摘 要：The mechanical behavior of two fiber-reinforced composites,i.e.,CF3031/QY8911 and EW100A/BA9916,under dynamic loadings were carefully studied by using split Hopkinson pressure bar(SHPB) *** results show that most of the stress strain curves of both of the two composites are not monotonous but exhibite double-peak shape. The deformation as well as fracture characteristics of the composites under dynamic loadings were captured by using high speed *** photoes indicate that two different failure mechanisms work during dynamic fracture *** first one is the overall shear,which occurs along the path 45°to the loading *** second one is the cleavage between the fiber and the matrix(see figure 1).The competition between these two mechanisms determines the deformation behavior of the *** the overall shear dominates,the stress increase monotonously with increasing strain until ***,if the cleavage mechanism dominates,the double peak character shows itself in the stress-strain curves.