1968 年 17 巻 176 号 p. 404-407
Using a high speed impact tensile testing machine with a large rotary disk installed in Tokyo Institute of Technology, the high speed impact tensile fracture was photographed at a speed of 5000∼7000 frames per second using HIMAC 16 HB (16mm, camera maximum speed 10000fps) high speed motion picture camera, with the test pieces made of mild steel.
The following results were obtained from the experiment
(1) Fractures at the impact velocity of 10, 15, and 20m/sec were clearly observed by the motion picture.
(2) The specimens were pulled by impact tensile load without bending by the high speed impact tensile testing machine with a large rotary disk.