空間差分測定法を用いたSHPB法による衝撃押込試験

抄録

Impact hardness measurement based on the Split-Hopkinson Pressure Bar method is promising technique to characterize dynamic surface properties of basic and advanced materials for mechanics and electronics. Since the force to impress an indenter increases sharply with depth associating with high rate of deformation, it is fundamental requirement to identify the whole process of measurement even in the initial region with high accuracy. In the present investigation the spatial difference method instead of time difference method is newly developed taking account of wave propagation characteristics of this kind of measurement, and is applied to simulate force-depth relations. The method was found to provide reliable time-difference measurements of impact hardness test together with direct measurements in the initial small force stage of the process, and was also applied to experiments on Titanium alloys.