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 Π < 1.58 and 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.
Original language | English |
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Pages (from-to) | 173-177 |
Number of pages | 5 |
Journal | Physical Mesomechanics |
Volume | 13 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 2010 |
Keywords
- Deformation
- Fracture
- Methods of strain measurements
- Plastic zones
- Stress state
ASJC Scopus subject areas
- Mechanics of Materials
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces