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## FINITE ELEMENT MODELLING OF A SMOOTH TENSILE SPECIMEN AND A COMPACT TENSION SPECIMEN WITH THE GURSON-TVEERGARD-NEEDLEMAN AND ROUSSELIER MICRO- MECHANICAL MODELS

### Citations

282 |
Continuum Theory of Ductile Rupture by Void Nucleation and Growth—Part I. Yield Criteria and Flow Rules for Porous Ductile Media,"
- Gurson
- 1977
(Show Context)
Citation Context ...UTIVE EQUATIONS The constitutive equations of the two models used for the Round Robin are presented in the following.sThey include the Rousselier model and the GTN (Gurson-Tveergard-Needleman ) model =-=[5, 6]-=-, both available in CASTEM 2000. Rousselier Model The constitutive equations of the Rousselier model are based on the Von Mises yield condition extended for porous media : ( ) ( ) ( )pR.f1exp.f..D f1 ... |

5 |
Comparison between a quantitative microscope and chemical methods for assessment of nonmetallic inclusions.
- Franklin
- 1969
(Show Context)
Citation Context ....sThe initial void volume fraction can be determined either from metallographic analysis of the material microstructure or from a chemical analysis of the material together with the Franklin formulae =-=[10]-=-.sA FE (finite element) analysis can then be undertaken in order to finely tune the f0 value. It is done in such a way that the simulations allow to reproduce exactly the experimental rupture points o... |

4 |
Untersuchungen zur Beschreibung des Versagensverhaltens mit Hilfe von Schädigungsmodellen am Beispiel des Werkstoffes 20MnMoNi5-5
- Seidenfuss
- 1992
(Show Context)
Citation Context ...s model, no account is given to nucleation and an initial void volume fraction f0 has to be specified. The Rousselier model, as implemented in the code, includes a modification proposed by Seidenfuss =-=[7]-=- to account for the coalescence of voids. This modification allows to perform fracture mechanics calculations [8] and consists in the following : if f = f0 damage free material, if f0 < f < fc damaged... |

3 |
Les modèles de rupture ductile et leurs possibilités actuelles dans le cadre de I' approche locale de la rupture. International seminar on local approach of fracture, Moret/Sur Loing,
- Rousselier
- 1986
(Show Context)
Citation Context ...fracture phenomena including ductile tearing and cleavage for round tensile specimens only.sIn 1996, CEA and MPA Stuttgart in Germany performed the Phase I calculations [2] using the Rousselier model =-=[3]-=- and the FE code CASTEM 2000 [4]. The second phase of this Round Robin has started in August 1997. It consists in investigating the ability of micro-mechanical models to predict ductile tearing and cl... |

3 |
An analysis of ductile rupture in notched
- Needleman, Tvergaard
- 1984
(Show Context)
Citation Context ...UTIVE EQUATIONS The constitutive equations of the two models used for the Round Robin are presented in the following.sThey include the Rousselier model and the GTN (Gurson-Tveergard-Needleman ) model =-=[5, 6]-=-, both available in CASTEM 2000. Rousselier Model The constitutive equations of the Rousselier model are based on the Von Mises yield condition extended for porous media : ( ) ( ) ( )pR.f1exp.f..D f1 ... |

2 |
Commissariat à l’Energie Atomique, DRN/DMT/SEMT/LM2S, 91191, Gif sur Yvette
- CASTEM
- 1998
(Show Context)
Citation Context ...tile tearing and cleavage for round tensile specimens only.sIn 1996, CEA and MPA Stuttgart in Germany performed the Phase I calculations [2] using the Rousselier model [3] and the FE code CASTEM 2000 =-=[4]-=-. The second phase of this Round Robin has started in August 1997. It consists in investigating the ability of micro-mechanical models to predict ductile tearing and cleavage in CT (compact tension) s... |

2 |
Evaluation of different fracturemechanical J-integral initiation values with regard to their usability in the safety assessment of components
- Eisele, Roos
- 1990
(Show Context)
Citation Context ...parison of the J values at initiation (Ji) with the predictions was achieved. One reliable way for determining this value is to examine the width of the stretched zone at the onset of crack extension =-=[11, 12]-=-. Since this value was not available in the Round Robin, it was determined from an analysis of the JR curve. The tearing resistance curve was first extrapolated to a 0 value of crack extension, as sho... |

1 |
ESIS TC8 Round Robin, Identification of the Rousselier Model Parameters for a 22
- Poussard, Seidenfuss
- 1996
(Show Context)
Citation Context ...and local approach to describe fracture phenomena including ductile tearing and cleavage for round tensile specimens only.sIn 1996, CEA and MPA Stuttgart in Germany performed the Phase I calculations =-=[2]-=- using the Rousselier model [3] and the FE code CASTEM 2000 [4]. The second phase of this Round Robin has started in August 1997. It consists in investigating the ability of micro-mechanical models to... |

1 |
On the Simulation of Ductile Crack Growth using the Rousselier Model
- Poussard, Seidenfuss
- 1997
(Show Context)
Citation Context ...lier model, as implemented in the code, includes a modification proposed by Seidenfuss [7] to account for the coalescence of voids. This modification allows to perform fracture mechanics calculations =-=[8]-=- and consists in the following : if f = f0 damage free material, if f0 < f < fc damaged material where fc is the critical void volume fraction, if f = fc fully damaged material, coalescence. The stres... |

1 |
ESIS P6-98 : Procedure to measure and calculate material parameters for the local approach to fracture using notched tensile specimens, European Structural Integrity Society, Eds Karl-Heinz Schwalbe
- ESIS
- 1998
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Citation Context ...th that Round Robin will be used to draft an ESIS recommendation which will include coupled damaged models and their application to cracked bodies. It will be an extension of the ESIS P6-98 guideline =-=[9]-=- for which the application is restricted to crack free specimens and components. With the exception of the material stress-strain curve which has to be first determined from tensile tests on smooth te... |

1 |
Application and Evaluation of Different Methods for Determining Crack Resistance Curves, Nuclear Engineering and Design
- Roos
- 1991
(Show Context)
Citation Context ...parison of the J values at initiation (Ji) with the predictions was achieved. One reliable way for determining this value is to examine the width of the stretched zone at the onset of crack extension =-=[11, 12]-=-. Since this value was not available in the Round Robin, it was determined from an analysis of the JR curve. The tearing resistance curve was first extrapolated to a 0 value of crack extension, as sho... |

1 |
Unified Method of Test for the Determination of Quasistatic Fracture Toughness, ISO/TC164/SC4, Committee Document N123. TABLES Table 1 : Calculated CT characteristics at initiation Model Void nucleation Initial void volume fraction f0 Element size (Lx Ly)
- Schwalbe
- 1994
(Show Context)
Citation Context ...xtrapolated to a 0 value of crack extension, as shown in Figure 7. Ji_exp was then determined as the intersection between the extrapolated JR curve and the blunting line as defined by Schwalbe et al. =-=[13]-=-.sIn this document, the blunting line is expressed by J=3.75.Rm.∆a where Rm is the ultimate tensile stress.sFrom the stress-strain curve of the material given in the Round Robin, the blunting line is ... |