Observation of crack tip vicinity by a high-speed camera and research on dynamic fracture toughness

Kensuke Ichinose; Fumitaka Moriwaki; Kenji Gomi

doi:10.1117/12.469185

13 November 2002 Observation of crack tip vicinity by the high-speed camera and research on dynamic fracture toughness

Kensuke Ichinose, Fumitaka Moriwaki, Kenji Gomi

Proceedings Volume 4934, Smart Materials II; (2002) https://doi.org/10.1117/12.469185
Event: SPIE's International Symposium on Smart Materials, Nano-, and Micro- Smart Systems, 2002, Melbourne, Australia

Abstract

In this paper, plastic region growing process which appeared in crack tip was visualized by stretcher strain, and it was observed using high-speed camera. Then, the fracture toughness value was calculated from the largest plastic region size. It was assumed that the relation equal to the case in which it is static under dynamic load was established, and we carried out dynamic experiment. The dynamic load was measured using piezo load-cell which is difficult to receive the effect of stress wave, the fracture toughness value was decided by the strain gauge method. For comparison, we also carried out static experiment comply ASTM E399-90. Then, the relationship between fracture toughness value calculated from the maximum load and it calculated from the largest plastic region size was investigated.

Citation Download Citation

Kensuke Ichinose, Fumitaka Moriwaki, and Kenji Gomi "Observation of crack tip vicinity by the high-speed camera and research on dynamic fracture toughness", Proc. SPIE 4934, Smart Materials II, (13 November 2002); https://doi.org/10.1117/12.469185

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