Analysis and discussion on impact shear experiment technique of composite laminate

In this paper, aiming at the material properties and application characteristics of the composite laminates, the experimental technology of the impact shear dynamic mechanical properties of the “bar-tube” has been optimized based on technical analysis for impact shear test of HOPKINSON bar. And the problems of experimental technology, such as beating of input bar, difficulties in coaxial adjustment, large dispersion in results and so on, have been solved. According to the matching analysis among input bar, output tube and composite material samples, the constraint conditions of size among input bar, samples and output tube has been established. The influence law of the preset shear clearance to impact shear has been researched via the numerical analysis of finite element. The impact shear data of composite laminates reinforced by glass fiber indicates that the loading rate obviously influences on the mechanical properties of dynamic shear.