Fracture mechanics analyses of a reactor pressure vessel under non-uniform cooling with a combined TRACE-XFEM approach

Mora, Diego F.; Garrido, Oriol Costa; Mukin, Roman; Niffenegger, Markus

doi:10.1016/j.engfracmech.2020.107258

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…Practical applications naturally followed development, [61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79] starting with early efforts by Sukumar et al In paper, 61 multiple branches and holes as well as cracks emanating from holes were analyzed by the XFEM, and using standard displacement-based approximation is enriched by incorporating discontinuous fields through a partition-of-unity method. Computation of the SIFs in different examples was presented to demonstrate the accuracy and the robustness of the proposed technique.…”

Section: Literature Overviewmentioning

confidence: 99%

“…73 Results showed that the interaction between web and rim thickness may influence the crack propagation and the corresponding safe or catastrophic failure mode. The paper 74 presents the integrity analysis of a model reactor pressure vessel (RPV) subjected to pressurized thermal shocks, including thermohydraulics, thermomechanical, and fracture mechanics simulations of three hypothetical loss of coolant accidents. In paper, 75 it was shown that the effect of cladding on the RPV integrity is enhanced with the increase of crack size.…”

Section: Literature Overviewmentioning

confidence: 99%

“…Nevertheless, before case studies, some of the most important developments (achievements) are presented shortly in the next section, 40–48 comprising also applications to solve concrete problems 49–80 …”

Section: Introductionmentioning

confidence: 99%

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Fatigue crack growth simulation by extended finite element method: A review of case studies

Sedmak

2024

Fatigue Fract Eng Mat Struct

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Numerical simulation of fatigue crack growth (FCG) is presented, based on the application of the extended finite element method (XFEM). Couple of case studies are presented, as a review of recent experience of the Belgrade school of XFEM simulations, established at the Faculty of Mechanical Engineering. Case studies comprised Charpy specimen with initial crack at the notch tip, oil rig pipe with an axial surface crack, pressure vessels with a crack at the welded joint with connecting pipe, turbine shaft with a crack at the transition radius, optimization of a wing spar in respect to FCG, the effect of mesh size on fatigue life estimation of a stringer panel, fatigue life estimation of wing‐to‐fuselage connecting lug, geometry effect on fatigue life of orthopedic plates and fatigue life of hip implant. Based on these case studies, XFEM is discussed in respect to its accuracy and efficiency. It is concluded that XFEM is a versatile tool for simulation of FCG, providing an excellent option for precise and reliable fatigue life of a cracked component.

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Section: Literature Overviewmentioning

confidence: 99%

Section: Literature Overviewmentioning

confidence: 99%

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Fatigue crack growth simulation by extended finite element method: A review of case studies

Sedmak

2024

Fatigue Fract Eng Mat Struct

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“…A variety of numerical methodologies have been developed by researchers for predicting crack growth under static and fatigue loading conditions, such as the finite element method (FEM), 10 extended isogeometric analysis (XIGA), [11][12][13][14] extended finite element method (XFEM), [15][16][17][18][19] and element free Galerkin methods (EFGM). 10 Researchers efficiently use these methods for predicting mechanical behavior such as fracture toughness, fatigue, and tensile properties.…”

Section: Introductionmentioning

confidence: 99%

A study on XFEM simulation of tensile, fracture toughness, and fatigue crack growth behavior of Al 2024 alloy through fatigue crack growth rate models using genetic algorithm

Gairola

Jayaganthan

Verma

2023

Fatigue Fract Eng Mat Struct

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This study aims to numerically validate and simulate the fatigue crack growth rate (FCGR), tensile, and fracture toughness properties of T3 and T351 tempered aerospace grade Al 2024 alloy. The extended finite element method (XFEM) coupled with a genetic algorithm (GA) was used to predict FCGR behavior in the framework of an in‐house developed MATLAB code. The numerical simulation was performed using three different FCGR models, i.e., Paris, Forman, and Nasgro. The FCGR prediction ability of simulation models was improved and compared further using GA. The Nasgro model with genetically optimized parameters shows the highest FCGR prediction accuracy compared to other FCGR models. The critical stress intensity factor and von Mises stress distribution under static loading were also predicted for C(T) specimen. A similar XFEM approach was used for analyzing the tensile behavior using a center cracked specimen at the gage section of a dog bone‐shaped specimen.

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“…Chouhan R. et al have also presented computational studies on pressurized thermal shock in an RPV [9]. e integrity analyses of a reactor pressure vessel under PA PTS scenarios using the TRACE-XFEM approach have been performed by Mora D. F. et al [10]. Also, Mora D. F. et al have modeled a reactor pressure vessel subjected to pressurized thermal shock using 3D-XFEM [11].…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Analysis of a Reactor Pressure Vessel under Pressurized Thermal Shock Caused by Inadvertent Actuation of the Safety Injection System

Annor-Nyarko

Xia

Ayodeji

2022

Science and Technology of Nuclear Installations

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The damage induced pressurized thermal shock (PTS) may pose to a reactor pressure vessel (RPV) is a critical safety requirement assessed as part of the ageing management programme of pressurized water reactors (PWRs). A number of researches have studied PTS initiated mainly by postulated accidents such as loss of coolant accidents (LOCAs). However, investigations on PTS-induced threat on RPV caused by inadvertent actuation of the safety injection, a frequent anticipated transient, have not been thoroughly studied. In this paper, a simplified multistep analysis method is applied to study the thermomechanical status of a two-loop PWR under PTS loads caused by inadvertent actuation of the safety injection system. A direct-coupling thermomechanical analysis is performed using a three-dimensional (3D) RPV finite element model. A 3D finite element submodel (consisting of the highiest stress concentration area in the RPV) and an assumed crack are then used to perform fracture mechanics analysis. Subsequently, the critical integrity parameter-stress intensity factor (SIF) is estimated based on FRANC3D-M-integral method coupled in the multistep simulation. The material fracture toughness of the vessel is computed based on the master curve method with experimental fracture toughness data. The results obtained from the direct coupling stress analysis in comparison with sequential coupling approach demonstrate the effectiveness of the proposed multistep method. Also, comparing SIF results obtained with that calculated based on the conventional virtual crack-closure technique (VCCT) and extended finite element method (XFEM) show good agreement. This study provides a useful basis for future studies on anticipated transient-induced crack propagation and remaining service life prediction of ageing reactor pressure vessels.

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Fracture mechanics analyses of a reactor pressure vessel under non-uniform cooling with a combined TRACE-XFEM approach

Cited by 7 publications

References 27 publications

Fatigue crack growth simulation by extended finite element method: A review of case studies

Fatigue crack growth simulation by extended finite element method: A review of case studies

A study on XFEM simulation of tensile, fracture toughness, and fatigue crack growth behavior of Al 2024 alloy through fatigue crack growth rate models using genetic algorithm

Thermomechanical Analysis of a Reactor Pressure Vessel under Pressurized Thermal Shock Caused by Inadvertent Actuation of the Safety Injection System

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