Journal ArticleDOI
Estimation of Gurson material parameters in bimetallic weldments for the nuclear reactor heat transport piping system
Rahul Chhibber,Navneet Arora,S. R. Gupta,B. K. Dutta +3 more
- Vol. 222, Iss: 12, pp 2331-2349
TLDR
In this article, the estimation of Gurson material parameters of base metal and weld metal regions of a BMW was performed using the micromechanical modelling approach for addressing the structural integrity issues in BMWs.Abstract:
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.read more
Citations
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Journal ArticleDOI
Parameter identification of a mechanical ductile damage using Artificial Neural Networks in sheet metal forming
TL;DR: In this article, many experimental tests and finite element model computation are performed to predict the damage evolution in notched tensile specimen of sheet metal using the Gurson-Tvergaard-Needleman (GTN) model.
Journal ArticleDOI
Numerical determination of the forming limit curves of anisotropic sheet metals using GTN damage model
TL;DR: In this paper, the authors used the Gurson-Tvergaard-Needleman (GTN) damage model to determine the forming limit curve of anisotropic sheet metals.
Journal ArticleDOI
Experimental and numerical investigation of ductile fracture using GTN damage model on in-situ tensile tests
TL;DR: In this article, the void related parameters of GTN model for SAE 1010 plain carbon steel were identified by response surface method (RSM) through minimizing the difference between numerical and experimental results of tensile test on a standard specimen.
Journal ArticleDOI
An analysis of the load-carrying capacity of elements subjected to complex stress states with a focus on the microstructural failure
TL;DR: In this paper, a modified Gurson-Tvergaard-Needelman (GTN) model was used to numerically analyse S235JR steel elements under the action of complex stresses.
Journal ArticleDOI
Nanoscale conditions for ductile void nucleation in copper: Vacancy condensation and the growth-limited microstructural state
TL;DR: In this paper, the role of dislocations during void nucleation in ductile deformation has been investigated and it is shown that dislocation boundaries facilitate the growth process of void growth.
References
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Journal ArticleDOI
Continuum Theory of Ductile Rupture by Void Nucleation and Growth: Part I—Yield Criteria and Flow Rules for Porous Ductile Media
Journal ArticleDOI
Influence of voids on shear band instabilities under plane strain conditions
TL;DR: In this paper, the effect of microscopic voids on the failure mechanism of a ductile material is investigated by considering an elastic-plastic medium containing a boubly periodic array of circular cylindrical voids.
Journal ArticleDOI
On localization in ductile materials containing spherical voids
TL;DR: In this article, an axisymmetric numerical model and a set of approximate constitutive equations for a voided material suggested by Gurson were used to analyse bifurcation into a localized mode.
Book ChapterDOI
Material Failure by Void Growth to Coalescence
TL;DR: In this paper, a convected coordinate formulation of the field equations is used to describe the material failure by coalescence of microscopic voids, and a detailed micromechanical study of shear band bifurcation that accounts for the interaction between neighboring voids and the strongly nonhomogeneous stress distributions around each void has been carried out, and also elaborated in this chapter.
Journal ArticleDOI
An analysis of ductile rupture in notched bars
Alan Needleman,Viggo Tvergaard +1 more
TL;DR: In this paper, a set of elastic-plastic constitutive relations that account for the nucleation and growth of microvoids is analyzed numerically, based on the set of constitutive relation for axisymmetric and plane strain notched tensile specimens.