Abstract
The basic parameters that influence the mechanism of non-elastic deformation in glassy PETP in adsorption-active media have been analysed. Whether the deformation will proceed as crazing or via the neck formation depends on the ratio of the rate of craze growth to the rate with which the stress increases in the interior of the specimen: if the craze succeeds to grow throughout the cross-section of the sample, thus releasing the stress in the material before the limit of flow is reached, crazing becomes the dominating mechanism; in the opposite case the process proceeds via the neck formation. The time required for the craze to penetrate through the specimen depends on its rate of growth and on the sample cross-section. The critical values of parameters that are decisive for one or the other mechanism to dominate the deformation have been calculated theoretically; a good agreement between theory and experiment has been found.
Published Version
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