Influence of mechanical mismatching on the failure of welded joints by void nucleation and coalescence

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Influence of mechanical mismatching on the failure of welded joints by void nucleation and coalescence. / Li, XY; Hao, Q; Shi, YW; Lei, YP; Marquis, G.

In: International Journal of Pressure Vessels and Piping, Vol. 80, No. 9, 09.2003, p. 647-654.

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@article{0c8d01c1ea714cda96a768f90c76e65b,
title = "Influence of mechanical mismatching on the failure of welded joints by void nucleation and coalescence",
abstract = "Based on the modified Gurson model, the changes of void volume fraction, a scalar parameter of damage, were analysed by the finite element method for mismatched welded joint models as well as for two mild steel base metals. Both over matching and under matching of the joints were considered and the width of the weld was varied for each type of mismatching. It was found that the damage of under-matched joints mainly occurred in the sandwiched layer and the damage resistance of the joints decreases with a decrease of the width of the sandwiched layer. The damage of over-matched joints mainly occurred in the base metal adjacent to the sandwiched layer and the damage resistance of the joints increases with decrease of the width of the sandwiched layer. For damage dominated by the strain controlled void nucleation mechanism, it is suggested that a reasonably wide weld is chosen for under-matched welded joints while a narrower weld is chosen for over-matched welded joints. (C) 2003 Elsevier Ltd. All rights reserved.",
keywords = "ductile damage, welded joints, mismatching, FEM, DUCTILE RUPTURE, CONTINUUM, DEFORMATION, GROWTH, MODEL",
author = "XY Li and Q Hao and YW Shi and YP Lei and G Marquis",
year = "2003",
month = "9",
doi = "10.1016/S0308-0161(03)00094-2",
language = "English",
volume = "80",
pages = "647--654",
journal = "International Journal of Pressure Vessels and Piping",
issn = "0308-0161",
number = "9",

}

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TY - JOUR

T1 - Influence of mechanical mismatching on the failure of welded joints by void nucleation and coalescence

AU - Li, XY

AU - Hao, Q

AU - Shi, YW

AU - Lei, YP

AU - Marquis, G

PY - 2003/9

Y1 - 2003/9

N2 - Based on the modified Gurson model, the changes of void volume fraction, a scalar parameter of damage, were analysed by the finite element method for mismatched welded joint models as well as for two mild steel base metals. Both over matching and under matching of the joints were considered and the width of the weld was varied for each type of mismatching. It was found that the damage of under-matched joints mainly occurred in the sandwiched layer and the damage resistance of the joints decreases with a decrease of the width of the sandwiched layer. The damage of over-matched joints mainly occurred in the base metal adjacent to the sandwiched layer and the damage resistance of the joints increases with decrease of the width of the sandwiched layer. For damage dominated by the strain controlled void nucleation mechanism, it is suggested that a reasonably wide weld is chosen for under-matched welded joints while a narrower weld is chosen for over-matched welded joints. (C) 2003 Elsevier Ltd. All rights reserved.

AB - Based on the modified Gurson model, the changes of void volume fraction, a scalar parameter of damage, were analysed by the finite element method for mismatched welded joint models as well as for two mild steel base metals. Both over matching and under matching of the joints were considered and the width of the weld was varied for each type of mismatching. It was found that the damage of under-matched joints mainly occurred in the sandwiched layer and the damage resistance of the joints decreases with a decrease of the width of the sandwiched layer. The damage of over-matched joints mainly occurred in the base metal adjacent to the sandwiched layer and the damage resistance of the joints increases with decrease of the width of the sandwiched layer. For damage dominated by the strain controlled void nucleation mechanism, it is suggested that a reasonably wide weld is chosen for under-matched welded joints while a narrower weld is chosen for over-matched welded joints. (C) 2003 Elsevier Ltd. All rights reserved.

KW - ductile damage

KW - welded joints

KW - mismatching

KW - FEM

KW - DUCTILE RUPTURE

KW - CONTINUUM

KW - DEFORMATION

KW - GROWTH

KW - MODEL

U2 - 10.1016/S0308-0161(03)00094-2

DO - 10.1016/S0308-0161(03)00094-2

M3 - Article

VL - 80

SP - 647

EP - 654

JO - International Journal of Pressure Vessels and Piping

JF - International Journal of Pressure Vessels and Piping

SN - 0308-0161

IS - 9

ER -

ID: 3206585