Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
801203 | Physical Mesomechanics | 2010 | 5 Pages |
Abstract
The paper studies the mechanical properties and configuration of plastic zones in notched high-strength structural steel under tension. Quantitative analysis of the plastic zones is made by constructing strain intensity distribution patterns with the use of the television-optical measuring complex TOMSC. Fracture associated with plastic flow is analyzed by comparing fractographs and distributions of strain characteristics. It is found that the fracture originates in a region with maximum strain intensity. It is shown that the mechanisms of plastic flow in high-strength steel specimens with Î < 1.58 and Î > 4.65, where Î is the index of initial stress stiffness, differ considerably. It is demonstrated that the high-strength steel specimens are fractured by quasibrittle mechanisms; however, ductile micromechanisms through pore nucleation and growth remain operative at all stages of fracture.
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Authors
L.S. Derevyagina, V.E. Panin, A.I. Gordienko,