Aspects of cleavage fracture initiation

Relative influence of stress and strain

Kim Wallin (Corresponding Author), Anssi Laukkanen

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

Abstract

Cleavage fracture initiation has generally been assumed to be controlled mainly by matrix stress. Recently, several different cleavage fracture models have been proposed, where also strain is included in the failure criterion. However, the proposals have been rather crude and unable to provide clearly improved fracture estimates. Here, the first two steps of cleavage fracture (particle failure and grain fracture) are examined in more detail. It is shown that both stress and strain are important for cleavage fracture initiation, but that strain mainly affects particle failure, whereas grain fracture is controlled by a pure Griffith criterion. The findings are important for the development of new cleavage fracture models and to the proper way of accounting for constraint.
Original languageEnglish
Pages (from-to)788-798
Number of pages11
JournalFatigue & Fracture of Engineering Materials & Structures
Volume29
Issue number9-10
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • cleavage fracture
  • fracture
  • fracture mechanics
  • fatigue stress
  • stress
  • strain
  • ProperTune

Cite this

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abstract = "Cleavage fracture initiation has generally been assumed to be controlled mainly by matrix stress. Recently, several different cleavage fracture models have been proposed, where also strain is included in the failure criterion. However, the proposals have been rather crude and unable to provide clearly improved fracture estimates. Here, the first two steps of cleavage fracture (particle failure and grain fracture) are examined in more detail. It is shown that both stress and strain are important for cleavage fracture initiation, but that strain mainly affects particle failure, whereas grain fracture is controlled by a pure Griffith criterion. The findings are important for the development of new cleavage fracture models and to the proper way of accounting for constraint.",
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Aspects of cleavage fracture initiation : Relative influence of stress and strain. / Wallin, Kim (Corresponding Author); Laukkanen, Anssi.

In: Fatigue & Fracture of Engineering Materials & Structures, Vol. 29, No. 9-10, 2006, p. 788-798.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Aspects of cleavage fracture initiation

T2 - Relative influence of stress and strain

AU - Wallin, Kim

AU - Laukkanen, Anssi

PY - 2006

Y1 - 2006

N2 - Cleavage fracture initiation has generally been assumed to be controlled mainly by matrix stress. Recently, several different cleavage fracture models have been proposed, where also strain is included in the failure criterion. However, the proposals have been rather crude and unable to provide clearly improved fracture estimates. Here, the first two steps of cleavage fracture (particle failure and grain fracture) are examined in more detail. It is shown that both stress and strain are important for cleavage fracture initiation, but that strain mainly affects particle failure, whereas grain fracture is controlled by a pure Griffith criterion. The findings are important for the development of new cleavage fracture models and to the proper way of accounting for constraint.

AB - Cleavage fracture initiation has generally been assumed to be controlled mainly by matrix stress. Recently, several different cleavage fracture models have been proposed, where also strain is included in the failure criterion. However, the proposals have been rather crude and unable to provide clearly improved fracture estimates. Here, the first two steps of cleavage fracture (particle failure and grain fracture) are examined in more detail. It is shown that both stress and strain are important for cleavage fracture initiation, but that strain mainly affects particle failure, whereas grain fracture is controlled by a pure Griffith criterion. The findings are important for the development of new cleavage fracture models and to the proper way of accounting for constraint.

KW - cleavage fracture

KW - fracture

KW - fracture mechanics

KW - fatigue stress

KW - stress

KW - strain

KW - ProperTune

U2 - 10.1111/j.1460-2695.2006.01005.x

DO - 10.1111/j.1460-2695.2006.01005.x

M3 - Article

VL - 29

SP - 788

EP - 798

JO - Fatigue & Fracture of Engineering Materials & Structures

JF - Fatigue & Fracture of Engineering Materials & Structures

SN - 8756-758X

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ER -