Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1634793 | Procedia Materials Science | 2014 | 6 Pages |
Abstract
Outside the application limit of the stress intensity factor based fatigue life calculation, a substitute procedure has to be defined. Various proposals for a crack driving force parameter in elastic-plastic fracture mechanics are discussed. A preference in favor of the cyclic ΔJ-integral is elaborated, keeping its theoretical limitations in mind. Crack closure is also an important issue under large-scale yielding conditions. Experience cannot be transferred from the small-scale to the large-scale cyclic yielding regime or vice versa. The consequences for the fatigue lives under variable amplitude and multiaxial loading are shown.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys