French RSE-M and RCC-MR code appendices for flaw analysis: Presentation of the fracture parameters calculation—Part V: Elements of validation

Marie, Stéphane; Chapuliot, S.; Kayser, Y.; Lacire, M.H.; Drubay, B.; Barthelet, B.; Delliou, Patrick Le; Rougier, Viviana Carolina; Naudin, C.; Gilles, Philippe; Triay, M.

doi:10.1016/j.ijpvp.2007.05.007

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…The validation is based on a large finite element database, comprising Ramberg-Osgood and bilinear stress-strain curves. Thanks to this equivalent tensile curve, more accurate estimation of J for cracked welds is possible using analytical solutions developed for homogeneous components (Le Delliou and al., 2004 ;Marie and al., 2007). Most recent work permitted to take into account combined loading and bilinear materials in order to provide good estimation of J at the earliest stage of plasticity.…”

Section: Resultsmentioning

confidence: 99%

Development of a J-Estimation Scheme for Surface Cracks in Piping Welds

Delliou

Marie

Kayser

et al. 2008

Volume 4: Structural Integrity; Next Generation Systems; Safety and Security; Low Level Waste Management and Decommissioning; N

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The RSE-M Code provides rules and requirements for in-service inspection of French Pressurized Water Reactor power plants. The Code gives non mandatory guidance for analytical evaluation of flaws. Flaw assessment procedures rely on fracture mechanics analyses based on simplified methods (i.e. analytical). Analytical methods were developed under a cooperative program between EDF, CEA and AREVA NP to calculate the J integral in various cracked piping components (straight pipe, tapered transition, elbow and pipe-to-elbow junction). These methods are available for mechanical loading (in-plane bending moment, pressure, torsion moment), thermal loading as well as for combined loading. Moreover, they can be used either for materials with Ramberg-Osgood stress-strain curves or for real materials (stainless steels and carbon manganese steels, including those with yield plateaus). However, for the analysis of cracks in welds, they use the tensile properties of the weakest material between the base material and the weld material. This induces some conservatism on the estimated J values. A cooperative program was launched in 2004 to develop a J estimation scheme which takes into account the strength mismatch effects. The scheme relies on the definition of an ‘equivalent’ stress-plastic strain curve, as proposed in the R6 rule (section III.8: allowance for strength mismatch effects). This curve is then used with the analytical methods for homogeneous cracked components. In a first step, the method is developed for circumferential surface cracks in straight buttwelded pipes submitted to mechanical loading. It takes into account the geometry of the weld joint (V-shaped), as well as the location of the crack within the weld. This paper presents the current state of development of this J estimation-scheme.

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Section: Resultsmentioning

confidence: 99%

Development of a J-Estimation Scheme for Surface Cracks in Piping Welds

Delliou

Marie

Kayser

et al. 2008

Volume 4: Structural Integrity; Next Generation Systems; Safety and Security; Low Level Waste Management and Decommissioning; N

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“…Several authors [2][3][4][5] have been studied pipe fracture problems by means of numerical simulation in order to assess the mechanical integrity, taking into account different crack shapes. Raju and Newman [6] have obtained Linear Elastic Fracture Mechanics based stress intensity factors for a wide range of internal and external semi-elliptical surface cracks in a cylinder. The J-integral fracture parameter proposed by [7] has been extensively used in assessing fracture integrity of cracked engineering structures, which undergo large plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure

Mechab

Medjahdi

Salem

et al. 2020

Frattura Ed Integrità Strutturale

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This study presents a three dimensional finite element method analysis of semi-elliptical surface cracks in pipes under internal pressure load. In the elastic–plastic case, estimates of the J-integral are presented for various ratios including crack depth to pipe thickness (a/t) and strain hardening index in the (R-O) Ramberg-Osgood (n). Finally, failure probability is accessed by a statistical analysis for uncertainties in loads and material properties, and structural reliability and crack size. The Monte Carlo method is used to predict the distribution function of the mechanical response. According to the obtained results, we note that the stress variation and the crack size are important factors influencing on the distribution function of (J/Je).

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“…Parts II-IV provide compendia for specific components. The geometries are plates (part II [4]), pipes (part III [5]) and elbows (part IV [6]). Part V presents validation accuracy of the analytical methods: all information on the origin of the solutions proposed in this paper, and on their validation through comparison with other published solutions and with FE calculations are provided in this last paper.…”

Section: Introductionmentioning

confidence: 99%

French RSE-M and RCC-MR code appendices for flaw analysis: Presentation of the fracture parameters calculation—Part IV: Cracked elbows

Marie

Chapuliot

Kayser

et al. 2007

International Journal of Pressure Vessels and Piping

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Two French nuclear codes include flaw assessment procedures: the RSE-M Code ''Rules for In-service Inspection of Nuclear Power Plant Components'' and the RCC-MR code ''Design and Construction rules for mechanical components of FBR nuclear islands and high temperature applications''. Development of analytical methods has been made for the last 10 years through a collaboration between CEA, EDF and AREVA-NP, and through R&D actions involving CEA and IRSN. These activities have led to unification of the common methods of the two codes. The calculation of fracture mechanics parameters, and in particular the stress intensity factor K I and the J integral, has been widely developed for industrial configurations. All the developments have been integrated in the 2005 edition of RSE-M and in 2007 edition of RCC-MR.This series of papers is composed of five parts: the first presents an overview of the methods proposed in the RCC-MR and RSE-M codes. Parts II-IV provide compendia for specific components. The geometries are plates (part II), pipes (part III) and elbows (part IV). Part V presents validation of the methods, with details on their accuracy. This paper presents the stress intensity factor and J calculation for cracked elbows. General data applicable for all defect geometries are first presented, and then, compendia for K I and s ref calculations are provided for the available defect geometries. r

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French RSE-M and RCC-MR code appendices for flaw analysis: Presentation of the fracture parameters calculation—Part V: Elements of validation

Cited by 12 publications

References 17 publications

Development of a J-Estimation Scheme for Surface Cracks in Piping Welds

Development of a J-Estimation Scheme for Surface Cracks in Piping Welds

Probabilistic Elastic-plastic Fracture Mechanics Analysis of Propagation of Cracks in Pipes under Internal Pressure

French RSE-M and RCC-MR code appendices for flaw analysis: Presentation of the fracture parameters calculation—Part IV: Cracked elbows

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