A three dimensional numerical investigation of the T* integral along a curved crack front

J. H. Jackson; A. S. Kobayashi; S. N. Atluri

A three dimensional numerical investigation of the T* integral along a curved crack front

J. H. Jackson, A. S. Kobayashi, S. N. Atluri

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The Tε* integral was calculated numerically along an extending, tunneling crack front in an 8 mm thick, aluminum three-point bend (3PB) specimen, using a numerical model driven by experimentally obtained surface displacements. The model provided input to a contour integration for the Tε* integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the Tε* integral obtained on the surface (plane stress) and the plane stress values from previous studies. Tε* was observed to decrease from the outer surface of the specimen to the more constrained mid-plane. This difference became more pronounced as the crack grew.

Original language	English
Pages (from-to)	17-29
Number of pages	13
Journal	CMES - Computer Modeling in Engineering and Sciences
Volume	6
Issue number	1
State	Published - Jul 2004

Keywords

3-D fracture
CTOA
Crack tunneling
Stable crack growth
Tε* integral

Cite this

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title = "A three dimensional numerical investigation of the T* integral along a curved crack front",

abstract = "The Tε* integral was calculated numerically along an extending, tunneling crack front in an 8 mm thick, aluminum three-point bend (3PB) specimen, using a numerical model driven by experimentally obtained surface displacements. The model provided input to a contour integration for the Tε* integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the Tε* integral obtained on the surface (plane stress) and the plane stress values from previous studies. Tε* was observed to decrease from the outer surface of the specimen to the more constrained mid-plane. This difference became more pronounced as the crack grew.",

keywords = "3-D fracture, CTOA, Crack tunneling, Stable crack growth, Tε* integral",

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T1 - A three dimensional numerical investigation of the T* integral along a curved crack front

AU - Jackson, J. H.

AU - Kobayashi, A. S.

AU - Atluri, S. N.

PY - 2004/7

Y1 - 2004/7

N2 - The Tε* integral was calculated numerically along an extending, tunneling crack front in an 8 mm thick, aluminum three-point bend (3PB) specimen, using a numerical model driven by experimentally obtained surface displacements. The model provided input to a contour integration for the Tε* integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the Tε* integral obtained on the surface (plane stress) and the plane stress values from previous studies. Tε* was observed to decrease from the outer surface of the specimen to the more constrained mid-plane. This difference became more pronounced as the crack grew.

AB - The Tε* integral was calculated numerically along an extending, tunneling crack front in an 8 mm thick, aluminum three-point bend (3PB) specimen, using a numerical model driven by experimentally obtained surface displacements. The model provided input to a contour integration for the Tε* integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the Tε* integral obtained on the surface (plane stress) and the plane stress values from previous studies. Tε* was observed to decrease from the outer surface of the specimen to the more constrained mid-plane. This difference became more pronounced as the crack grew.

KW - 3-D fracture

KW - CTOA

KW - Crack tunneling

KW - Stable crack growth

KW - Tε integral

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JO - CMES - Computer Modeling in Engineering and Sciences

JF - CMES - Computer Modeling in Engineering and Sciences

IS - 1

ER -

A three dimensional numerical investigation of the T* integral along a curved crack front

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Keywords

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