Fracture from inherent flaws in polymers |
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| Authors: | S. Hashemi J. G. Williams |
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| Affiliation: | (1) Mechanical Engineering Department, Imperial College of Science and Technology, Exhibition Road, SW7 2BX London, UK |
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| Abstract: | Fracture data on polymethyl methacrylate, polyvinyl chloride, polyacetal and polypropylene in both tension and bending are given for a range of temperatures using unnotched specimens. It is concluded that all the failures occur at the gross crazing or yield stress and are thus stress-controlled, and the flaw size has little effect. The propagation behaviour of the flaws under these conditions is discussed in terms of stability criteria. |
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