Damage mechanics analysis (Gurson model) and experimental verification of the behaviour of a crack in a weld-cladded component

Schmitt, W.; Sun, Dong-Zhi; Blauel, J.G.

doi:10.1016/s0029-5493(97)00135-0

Cited by 27 publications

(10 citation statements)

References 4 publications

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“…(8) as a function of plastic strain is obtained from the uniaxial tension test data provided by the experimental group. The initial GTN model parameters of steels are based on refs (Bauvineau et al 1996;Decamp et al 1997;Siegmund et al 1998;Schmitt et al 1997;Skallerud and Zhang 1997;Benseddiq and Imad 2008). q 1 = 1.5, q 2 = 1, E N = 0.3, S N = 0.1, f 0 ≈ 0 and f F ≈ 0.2 are the standard material parameters for steel.…”

Section: Calibration Of Materials Model and Failure Parametersmentioning

confidence: 99%

The Sandia Fracture Challenge: blind round robin predictions of ductile tearing

et al. 2014

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Existing and emerging methods in computational mechanics are rarely validated against problems with an unknown outcome. For this reason, Sandia National Laboratories, in partnership with US National Science Foundation and Naval Surface Warfare Center Carderock Division, launched a computational challenge in mid-summer, 2012. Researchers and engineers were invited to predict crack initiation and propagation in a simple but novel geometry fabricated from a common off-the-shelf commercial engineering alloy. The goal of this international Sandia Fracture Challenge was to benchmark the capabilities for the prediction of deformation and damage evolution associated with ductile tearing in structural metals, including physics models, computational methods, and numerical implementations currently available in the computational fracture community. Thirteen teams participated, reporting blind predictions for the outcome of the Challenge. The simulations and experiments were performed independently and kept confidential. The methElectronic supplementary material The online version of this article (doi:10.1007/s10704-013-9904-6) contains supplementary material, which is available to authorized users.Sandia National Laboratories, Albuquerque, NM, USA e-mail: blboyce@sandia.gov ods for fracture prediction taken by the thirteen teams ranged from very simple engineering calculations to complicated multiscale simulations. The wide variation in modeling results showed a striking lack of consistency across research groups in addressing problems of ductile fracture. While some methods were more successful than others, it is clear that the problem of ductile fracture prediction continues to be challenging. Specific areas of deficiency have been identified through this effort. Also, the effort has underscored the need for additional blind prediction-based assessments.

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Section: Calibration Of Materials Model and Failure Parametersmentioning

confidence: 99%

The Sandia Fracture Challenge: blind round robin predictions of ductile tearing

et al. 2014

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“…Therefore, damage is assumed to occur because of pre‐existing microvoids and nucleation of new voids is not considered. (b) In the second type, initial void volume fraction f 0 = 0, ɛ N > 0 and f N > 0 . In this case, material is assumed to have no pre‐existing microvoids and damage happens only after the voids are nucleated.…”

Section: Gurson‐tvergaard‐needleman Model Calibrationmentioning

confidence: 99%

“…(b) In the second type, initial void volume fraction f 0 = 0, ε N > 0 and f N > 0. 18,30,31 In this case, material is assumed to have no pre-existing microvoids and damage happens only after the voids are nucleated. (c) In the third type, f 0 > 0, ε N > 0 and f N > 0, 32,33 and therefore, damage due to both initial voids and nucleated voids is considered.…”

Section: G U R S O N -T V E R G a A R D -N E E D L E M A N M O D E L mentioning

confidence: 99%

Gurson model parameters for ductile fracture simulation in ASTM A992 steels

Kiran

Khandelwal

2013

Fatigue Fract Eng Mat Struct

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This study is concerned with the modelling the ductile fracture in ASTM A992 steels using the Gurson‐Tvergaard‐Needleman (GTN) model for high stress triaxiality regime. The GTN model for ASTM A992 structural steels is calibrated from the experiments performed on axisymmetrically notched tensile specimens. The experiments are designed to obtain a range of stress triaxiality and different fracture initiation locations. The non‐uniqueness in the constitutive parameters of the GTN model is illustrated in this study. The choice of a unique set of GTN constitutive parameters is made by choosing the nucleation strain (ɛN) as a material constant. The process of estimating this material specific nucleation strain is provided. All the other GTN model parameters corresponding to the material specific nucleation strain (ɛN) are evaluated to best fit the experimental results. The calibrated GTN model is shown to predict the load displacement behaviour, ductility and fracture initiation locations in the notched specimens. The calibrated GTN parameters are used to successfully predict the ductility of structural components: (a) bars with a hole; (b) plate with reduced section and (c) plate with holes; that are typically found in structural engineering applications.

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“…Such modelling is done considering nucleation, growth, and coalescence of the voids in a material following large-scale plasticity. There are a wide variety of techniques available in damage mechanics [9]. Of them, the Gurson model [10] is one of the most powerful models and used successfully by researchers throughout the world.…”

Section: Micromechanical Modelling Approach For Structural Integrity mentioning

confidence: 99%

Estimation of Gurson material parameters in bimetallic weldments for the nuclear reactor heat transport piping system

Chhibber

Arora

Gupta

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part C:

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Bimetallic welds (BMWs) play a critical and indispensable role in the primary heat transport piping system of nuclear reactors. The primary heat transport system itself is the critical part of a nuclear reactor. Any failure of this system can lead to very grave consequences, not only speaking of huge monetary losses resulting from non-utilization of the reactor setup, but also immensely valuable and irreparable loss of human life. This paper describes the experimental efforts towards estimation of Gurson material parameters of base metal and weld metal regions of a BMW so as to use the micromechanical modelling approach for addressing the structural integrity issues in BMWs.

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Damage mechanics analysis (Gurson model) and experimental verification of the behaviour of a crack in a weld-cladded component

Cited by 27 publications

References 4 publications

The Sandia Fracture Challenge: blind round robin predictions of ductile tearing

The Sandia Fracture Challenge: blind round robin predictions of ductile tearing

Gurson model parameters for ductile fracture simulation in ASTM A992 steels

Estimation of Gurson material parameters in bimetallic weldments for the nuclear reactor heat transport piping system

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