27 July 1979 Determination Of Dynamic Stress Intensity Factors Of A Glassy Polymer Using A Shadow-Optical Method
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Proceedings Volume 0189, 13th Intl Congress on High Speed Photography and Photonics; (1979) https://doi.org/10.1117/12.957575
Event: 13th International Congress on High Speed Photography and Photonics, 1978, Tokyo, Japan
Abstract
In the present work dynamic and static mode I stress intensity factors KI of Polymethylmethacrylate were determined using a shadow-optical method in transmission. The shadow patterns under dynamic loading and during dynamic crack propagation were recorded by a high speed Cranz-Schardin spark camera. The dynamically loaded Charpy test specimens showed nonlinear oscillatory behaviour which was attributed to coupled vibrations between specimen and hammer. The values of the dynamic fracture toughness Kdyn were found to be about twice that of the static fracture toughness IcKIc stat.
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Kiyoshi Takahashi, W. Doll, "Determination Of Dynamic Stress Intensity Factors Of A Glassy Polymer Using A Shadow-Optical Method", Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957575; https://doi.org/10.1117/12.957575
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