Fully plastic analyses of unequally notched specimens in bending

Yun Jae Kim, Chang Kyun Oh, Jin Moo Park

研究成果: Article

1 引用 (Scopus)

抄録

This paper proposes slip line fields for bending of unequally notched specimens in plane strain, that have a sharp crack in one side and a sharp V-notch in the other side. Depending on the back angle, two slip line fields are proposed, from which the limit moment and crack tip stress fields are obtained as a function of the back angle. Excellent agreement between slip line field solutions with those from detailed finite element limit analysis based on non-hardening plasticity provides confidence in the proposed slip line fields. One interesting point is that, for the unequally notched specimen, the difference between the crack tip triaxial stress for tension and that for bending increases significantly with the increase in the back angle. This suggests that such a specimen could be potentially useful to investigate the crack tip constraint effect on fracture toughness of materials. In this respect, the possibility of designing a new toughness testing specimen with varying crack tip constraint is discussed.

元の言語English
ページ(範囲)265-273
ページ数9
ジャーナルInternational Journal of Mechanical Sciences
48
発行部数3
DOI
出版物ステータスPublished - 2006 3 1
外部発表Yes

Fingerprint

crack tips
Crack tips
slip
plastics
Plastics
triaxial stresses
plane strain
notches
toughness
fracture strength
plastic properties
stress distribution
Toughness
Plasticity
Fracture toughness
confidence
cracks
Cracks
moments
Testing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Fully plastic analyses of unequally notched specimens in bending. / Kim, Yun Jae; Oh, Chang Kyun; Park, Jin Moo.

:: International Journal of Mechanical Sciences, 巻 48, 番号 3, 01.03.2006, p. 265-273.

研究成果: Article

Kim, Yun Jae ; Oh, Chang Kyun ; Park, Jin Moo. / Fully plastic analyses of unequally notched specimens in bending. :: International Journal of Mechanical Sciences. 2006 ; 巻 48, 番号 3. pp. 265-273.
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N2 - This paper proposes slip line fields for bending of unequally notched specimens in plane strain, that have a sharp crack in one side and a sharp V-notch in the other side. Depending on the back angle, two slip line fields are proposed, from which the limit moment and crack tip stress fields are obtained as a function of the back angle. Excellent agreement between slip line field solutions with those from detailed finite element limit analysis based on non-hardening plasticity provides confidence in the proposed slip line fields. One interesting point is that, for the unequally notched specimen, the difference between the crack tip triaxial stress for tension and that for bending increases significantly with the increase in the back angle. This suggests that such a specimen could be potentially useful to investigate the crack tip constraint effect on fracture toughness of materials. In this respect, the possibility of designing a new toughness testing specimen with varying crack tip constraint is discussed.

AB - This paper proposes slip line fields for bending of unequally notched specimens in plane strain, that have a sharp crack in one side and a sharp V-notch in the other side. Depending on the back angle, two slip line fields are proposed, from which the limit moment and crack tip stress fields are obtained as a function of the back angle. Excellent agreement between slip line field solutions with those from detailed finite element limit analysis based on non-hardening plasticity provides confidence in the proposed slip line fields. One interesting point is that, for the unequally notched specimen, the difference between the crack tip triaxial stress for tension and that for bending increases significantly with the increase in the back angle. This suggests that such a specimen could be potentially useful to investigate the crack tip constraint effect on fracture toughness of materials. In this respect, the possibility of designing a new toughness testing specimen with varying crack tip constraint is discussed.

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