Effect of localized strain on fracture of high-strength structural steel with varying stress stiffness
| Autor: | A. I. Gordienko, V.E. Panin, L.S. Derevyagina |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Stiffness Fracture mechanics Surfaces and Interfaces Plasticity Condensed Matter Physics Stress (mechanics) Fracture toughness Mechanics of Materials medicine Fracture (geology) General Materials Science medicine.symptom Composite material Deformation (engineering) Stress intensity factor |
| Zdroj: | Physical Mesomechanics. 13:173-177 |
| ISSN: | 1029-9599 |
| DOI: | 10.1016/j.physme.2010.07.009 |
| Popis: | 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 Π 4.65, where Π 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. |
| Databáze: | OpenAIRE |
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