THE EFFECT OF STRAIN RATE AND CCVC INTERFACIAL LAYER ON MECHANICAL BEHAVIOUR OF CALL
应变率及CCVC界面层对CALL材料拉伸性能的影响

In this paper, the loading and loading-unloading tests of CALLand CALL(CCVC) under tensile impact have been carried out by a self-designed Rotating Circular Disk Tensile Impact Apparatus.The quasi-static tension and short beam bending tests are performed on the Shimadzu-5000 testing apparatus. Experiment results show: that both CALL and CALL(CCVC) have positivehybird effect. Under quasi-static tension, the composites have no obvious yielding until fracture, but have an obvious yielding point at the dynamic tensile stress-strain curves. The dynamic unstable fracture strain is aboutthree times the static unstable fracture strain. The interlaminar shear strength(ISS) of CALL(CCVC) is 10% more than that of CALL. At the same time, the tensile strength and unstable fracture stain of CALL(CCVC) are also higher than that of CALL. Some conclusions are also drawn from the SEM observation of the fracture specimen surface.Correspondent: RAO Shiguo, Department of Morden Mechnics, University of Science and Techology of China, Hefei 230026