A 2D model for numerical investigations of stable crack growth in thick smooth fracture mechanics specimens

Shan, G. X.; Kolednik, O.; Fischer, F.D.; Stüwe, H.P.

doi:10.1016/0013-7944(93)90011-g

Cited by 16 publications

(10 citation statements)

References 13 publications

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“…The local CTOAc value was then determined by numerically matching the measured fracture surface profiles. A detailed description of the procedure can be found in [4]. Both parameters, CTODi and CTOAc, were determined in the specimen center and at a distance of 0.5 mm inside the side surface.…”

Section: Methodsmentioning

confidence: 99%

“…In preceding investigations [3,4] a procedure was developed to simulate numerically fracture toughness tests conducted on smooth CT-specimens: The specimen is divided into two parts, a plane strain part of thickness Be for the behavior in the center region and a plane stress part of thickness Bs for the behavior near the two side surfaces. Of course, the sum of Bs and Be gives the real thickness of the specimen B.…”

Section: Introductionmentioning

confidence: 99%

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A numerical study on the crack growth behavior of a low and a high strength steel

1996

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Geometry and size effects on the crack growth resistance curves in CT-specimens of a low and high strength material are numerically investigated. The fracture process is controlled by experimentally determined critical values of the crack tip opening displacement (CTODi) for crack growth initiation and the crack tip opening angle (CTOAc) for stable crack growth. The results show that for the low and the high strength material the geometry and size effects are different. This is mainly due to the fact that the load vs. load line displacement records are basically different for the two materials which results from the large difference in the scaled fracture toughness parameters, CTODI/¢0 and CTOAc/¢o, of the two materials.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A numerical study on the crack growth behavior of a low and a high strength steel

1996

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“…The two-layer model has been applied successfully to simulate fracture mechanics tests numerically [2,3] and to investigate effects of geometry and size on the crack growth resistance curves [4-71. A recent review of the results is given in 181.…”

Section: Introductionmentioning

confidence: 99%

A Study of Near-Tip Local Parameters for Stable Crack Growth with a 3D FE-Analysis

Kolednik

Shan

Yan³

et al. 1996

J. Phys. IV France

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Abstract.A 3D-FEM simulation of a fracture mechanics test is presented where the crack extension, Aa, is controlled by local Aa vs. load line displacement curves measured on different locations along the crack front. These data originate from an extensive multispecimen JIc-test. The results of the 3D-analysis fit excellently to the experimental data and to the results of a modified two-layer model used in preceding studies. The current 3D-analysis supports the assumption that (after a short transition region) the local crack tip opening angle remains constant during growth.

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“…The ratio B~/B provides a reasonable measure of the plane strain constraint in a plain sided specimen. In [12] this model was successfully applied to simulate the stable crack growth in a compact tension (CT) specimen of a mild steel. Only one geometry was investigated in [12].…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation on the geometry dependence of the crack growth resistance in CT specimens

Shan¹,

Kolednik

Fischer

1994

Int J Fract

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The influence of the specimen thickness B and the ligament length b on the Jn-curves is numerically investigated for CT specimens. The thickness effect is taken into account with 2-D analyses by dividing a plain sided specimen into a plane stress part and a plane strain part. The fracture process is controlled by experimentally determined critical values of the crack tip opening displacement for crack growth initiation (CTOD,) and the crack tip opening angle for stable crack growth (CTOAc). It is shown that for the global behaviour of a plain sided specimen, the B/b ratio is essential. The difference between the geometry dependence of the initiation value of the J-integral and the geometry dependence of the slope of the Ja-curves is also shown.

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A 2D model for numerical investigations of stable crack growth in thick smooth fracture mechanics specimens

Cited by 16 publications

References 13 publications

A numerical study on the crack growth behavior of a low and a high strength steel

A numerical study on the crack growth behavior of a low and a high strength steel

A Study of Near-Tip Local Parameters for Stable Crack Growth with a 3D FE-Analysis

A numerical investigation on the geometry dependence of the crack growth resistance in CT specimens

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