Affiliation:
1. Politechnika Krakowska
Abstract
Size effect for tension specimen in creep condition is not very well recognised phenomenon. The Weibull’s works on influence of nonhomogeneity of material properties on its strength suggest that such effect should take place also for creep. The most of authors regard that the stress redistribution occurring during creep considerably reduces size effect. To examine it the author performed a series of experiments for thin tin alloy wires creeping in room temperature as well as some numerical simulations. The results confirmed the existence of size effect for time to failure. The numerical analysis was made for time of first macroscopic damage occurrencet1and for time of cross-section failuret2. Both these parameters show the influence of specimen size according to size effect law, but the dependence of parametert1was more pronounced.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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