Ductile Damage in Metal Forming: Advanced Macroscopic Modeling and Numerical Simulation

Saanouni, Khémaïs; Hamed, Mohamed; Labergère, Carl; Badreddine, Houssem

doi:10.1007/978-1-4614-5589-9_37

Cited by 14 publications

(70 citation statements)

References 80 publications

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“…This allows a lower damage rate in compression than in tension for the same amount of loading as can be found in (Saanouni, 2012). Accordingly, effect of the ductile damage on elastic behavior described by effective variables of Eq.…”

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 81%

“…This model is developed in framework of thermodynamics of irreversible processes with state variables, assuming large plastic strains and small elastic strains and taking into account an initial plastic anisotropy of Hill 1948 type. In order to ensure the required objectivity of constitutive equations, so-called rotating frame formulation is used which leads to additive decomposition of total strain rate tensor into an elastic small strain rate and finite plastic strain rate (Saanouni andChaboche, 2003, Badreddine et al, 2010). Detailed theoretical, numerical and applicative aspects of various versions of the fully coupled formulations can be found in (Badreddine et al, 2010) and (Saanouni, 2012).…”

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

“…In order to ensure the required objectivity of constitutive equations, so-called rotating frame formulation is used which leads to additive decomposition of total strain rate tensor into an elastic small strain rate and finite plastic strain rate (Saanouni andChaboche, 2003, Badreddine et al, 2010). Detailed theoretical, numerical and applicative aspects of various versions of the fully coupled formulations can be found in (Badreddine et al, 2010) and (Saanouni, 2012). In this framework, main constitutive equations used in this study are detailed.…”

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

“…The total fracture of the RVE (Representative Volume Element) is achieved when d=d c =0.99. The strong coupling between the plastic flow with hardening and the ductile damage is performed in the framework of the total energy equivalence assumption (Saanouni and Chaboche, 2003, Badreddine et al, 2010, Saanouni, 2012, …”

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

“…Accordingly, effect of the ductile damage on elastic behavior described by effective variables of Eq. (1) is modified and decomposed into deviatoric and hydrostatic parts as following: (Marigo, 1985, Ortiz, 1985, Simo and Ju, 1987, Lemaitre, 1992, Daudeville and Ladevèze, 1993, Lemaitre and Desmorat, 2005, Saanouni, 2012.…”

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

See 4 more Smart Citations

Experimental characterization and numerical prediction of ductile damage in forming of AA1050-O sheets

Msolli

Badreddine

Labergère

et al. 2015

International Journal of Mechanical Sciences

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Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 81%

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

Section: Mechanical Model Strongly Coupled With Ductile Damagementioning

confidence: 99%

See 3 more Smart Citations

Experimental characterization and numerical prediction of ductile damage in forming of AA1050-O sheets

Msolli

Badreddine

Labergère

et al. 2015

International Journal of Mechanical Sciences

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Anisotropic ductile damage fully coupled with anisotropic plastic flow: Modeling, experimental validation, and application to metal forming simulation

Rajhi

Saanouni

Sidhom

2014

International Journal of Damage Mechanics

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The main goal of this paper is the modeling, numerical simulation, and experimental validation of the anisotropic ductile damage effects on initially anisotropic plastic flow with mixed (isotropic and kinematic) nonlinear hardening under large plastic strains for metal forming processes simulation. A symmetric second-rank damage tensor together with a symmetrized fourth-rank damage-effect tensor is used to describe the anisotropic ductile damage evolution and its effect on the large plastic flow with hardening. Following the concept of effective state variables in the framework of the total energy equivalence assumption, the “Murakami” fourth-rank damage-effect tensor is chosen to describe the anisotropic damage effect on the elastic-plastic behavior including the mixed hardening. The “Lemaitre” ductile anisotropic damage evolution relationships, where the principal directions of the damage rate tensor are governed by those of the plastic strain rate tensor, are used. As difference with the works cited above, the nonlinear mixed isotropic and kinematic hardening is taken into account considering the full and strong damage effects through the effective state variables deduced from the total energy equivalence assumption initially proposed by Saanouni et al. The non-associative plasticity theory is considered, and the “ Hill 1948 ” quadratic (equivalent) stress norm is used to describe the large plastic anisotropic flow accounting for mixed isotropic and kinematic hardening with anisotropic damage effects. The formulation is performed assuming finite plastic strains and small elastic strains through the so-called rotated frame formulation. The obtained model was implemented into ABAQUS/Explicit® FE software thanks to the user’s developed subroutine VUMAT. The numerical aspects related to the time discretization of the fully coupled anisotropic constitutive equations are carefully described. Finally and for the validation purpose, the model is identified using an appropriate experimental data base concerning the grade 316L stainless steel to simulate numerically some metal forming processes.

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Efficient pseudo-inverse approach for damage prediction in cold forging process simulation

Halouani

Abbès

et al. 2014

International Journal of Damage Mechanics

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This article presents an efficient pseudo-inverse approach for the damage prediction in cold forging process simulation. Pseudo-inverse approach combines the advantages of the fast inverse approach and accurate incremental approaches. Some intermediate configurations are created geometrically and corrected mechanically to well describe the deformation path. The formulation of an axi-symmetrical element based on pseudo-inverse approach is presented. A strain-based damage model is introduced in the flow theory of plasticity. A direct scalar integration algorithm of plasticity-damage is developed, leading to a fast and robust algorithm for large strain increments. The cold forging processes of two axi-symmetrical parts are simulated to validate pseudo-inverse approach by the incremental approach ABAQUS/Explicit. Pseudo-inverse approach gives very good results, but uses much less CPU time.

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Ductile Damage in Metal Forming: Advanced Macroscopic Modeling and Numerical Simulation

Cited by 14 publications

References 80 publications

Experimental characterization and numerical prediction of ductile damage in forming of AA1050-O sheets

Experimental characterization and numerical prediction of ductile damage in forming of AA1050-O sheets

Anisotropic ductile damage fully coupled with anisotropic plastic flow: Modeling, experimental validation, and application to metal forming simulation

Efficient pseudo-inverse approach for damage prediction in cold forging process simulation

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