Effect of localized strain on fracture of high-strength structural steel with varying stress stiffness

L. S. Derevyagina, V. E. Panin, A. I. Gordienko

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)173-177
Number of pages5
JournalPhysical Mesomechanics
Volume13
Issue number3-4
DOIs
Publication statusPublished - 2010

Fingerprint

Steel
high strength
stiffness
high strength steels
plastic flow
Stiffness
steels
Plastic flow
High strength steel
plastics
Plastics
distribution (property)
Television
quantitative analysis
Nucleation
nucleation
mechanical properties
porosity
Mechanical properties
configurations

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

Cite this

Effect of localized strain on fracture of high-strength structural steel with varying stress stiffness. / Derevyagina, L. S.; Panin, V. E.; Gordienko, A. I.

In: Physical Mesomechanics, Vol. 13, No. 3-4, 2010, p. 173-177.

Research output: Contribution to journalArticle

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