Patent ID: 7222515
Filing Date: 2007-05-29
Classification: G01N

Abstract:
1. An impact test apparatus comprising: a holding device for holding a thin test piece made of an impact absorbing material at an arbitrary compression rate in a thickness direction; an impact applying device for applying an impact force to the test piece held by the holding device; an impact force sensing device for sensing the impact force applied to the test piece by the impact applying device; a displacement detecting device for detecting a displacement of the test piece when the impact force sensing device senses the impact force; and an output device for outputting impact stress-strain characteristic information expressing a relationship between an impact stress and a strain corresponding to the impact stress of the test piece on the basis of the impact force sensed by the impact force sensing device and the displacement detected by the displacement detecting device; wherein the holding device includes: and wherein: the impact applying device is movable into the opening of the pressing member to apply an impact force to the supporting plate, the impact force sensing device has a force sensor for detecting the impact force, the force sensor being disposed on a surface of the fixing jig opposite a surface to be brought in close contact with the test piece, and the displacement detecting device detects a displacement of the supporting plate in a direction toward the fixing jig as the displacement of the test piece in the thickness direction.