Abstract
Since studies on high-speed photoelasticity focusing on impact problems were performed there has been a lot of researchs, most of which seem to include not only dynamic but also quasi-static stress. Here, as part of basic research on impact problems, experiments have been conducted to investigate the behavior of stress waves in case that impact pulse loads are applied to test strips with circular holes.
The impact load application device was an airgun using compressed air to performe collisions with high-speed and low-mass objects. A Cranz-Schardin type stroboscopic camera was used to record the dynamic fringe patterns with the airgun.
