| 摘要 |
PURPOSE:To enable to perform a test of shock at a very low temperature, by a method wherein a strike cutter is placed on a sample above which the strike cutter and a strike rod being separated from each other are set, a strike is caused by vertically dropping the strike rod supported by a bearing. CONSTITUTION:A sample 3 is set at a lower end of an SUS pipe 1 with a thick wall thickness which extends downward from an SUS flange 2, a strike cutter 4 is placed on the center of the sample 3, and a strike rod 5 is vertically dropped from an upper part to strike the cutter with the rod. A light-shielding plate 8, wherein a slit is formed, is secured to the upper part of the strike rod 5, and a photo detector 9 is positioned so that it detects light from a photo source 10 in a position allowing the strike rod 5 to drop and cut the sample 3 by strike. A shock value is found from a change in kinetic energy found from a drop speed of the strike rod 5 in case the sample is set and the drop speed of the rod from the same position in case the sample is not set. This permits testing of the shock at a very low temperature. |
