Damage Induced Elastic Anisotropy

Cordebois, J.P.; Sidoroff, F.

doi:10.1007/978-94-009-6827-1_44

Cited by 169 publications

(108 citation statements)

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“…These considerations are close to the damage model proposed by Murakami and Kamiya (1997). Moreover, at the end of the seventies, Cordebois and Sidoroff (1979) proposed a damage model for brittle materials based on two different mechanisms. The first mechanism was related to shearing, whereas the second mechanism was assisted by the stress normal to the crack faces.…”

Section: Plastic and Damage Evolutions Further Commentsmentioning

confidence: 78%

Coupling Between Mesoplasticity and Damage in High-cycle Fatigue

Flacelière

Morel²,

Dragon

2007

International Journal of Damage Mechanics

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ABSTRACT:The multiaxial fatigue loading in the high-cycle regime leads to localized mesoscopic plastic strain that occurs in some preferential directions of individual grains for most metallic materials. Crack initiation modeling is difficult in this fatigue regime because the scale where the mechanisms operate is not the engineering scale (macroscopic scale), and local plasticity and damage act simultaneously. This article describes a damage model based on the interaction between mesoplasticity and local damage for the infinite and the finite fatigue life regimes. Several salient effects are accounted for via a simple localization rule, which connects the macroscopic scale with the mesoscopic one, and by the model presented here, which describes the coupled effects of mesoplasticity and damage growth.Irreversible thermodynamics concepts with internal state variables are used to maintain a balance between extensive descriptions of plastic flow and damage events. Cyclic hardening behavior is described by a combined isotropic and kinematic hardening rule while the damage evolution is governed notably by the accumulated plastic mesoscopic strain. In this study, predictions are compared to fatigue tests performed on a mild steel (C36) under different loading modes. All the experiments are carried out under in-phase loading conditions: reversed tension, torsion, and combined tension-torsion. The mean stress effect is also studied through tests conducted under tension. The predicted Wo¨hler curves under any loading mode can be readily obtained with this model, but the main feature of this approach is to ensure a clear link between the mesoscopic parameters like the hardening behavior of individual grains and the subsequent local damage.

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Section: Plastic and Damage Evolutions Further Commentsmentioning

confidence: 78%

Coupling Between Mesoplasticity and Damage in High-cycle Fatigue

Flacelière

Morel²,

Dragon

2007

International Journal of Damage Mechanics

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“…A general orthotropic law depends on nine constant parameters, while in this case, three dynamic damage components (besides Young's modulus and Poisson's ratio) enforces certain limitations on the elastic response. Cordebois and Sidoroff (1982) remarked that the importance of these limitations could only be evaluated by experiments. Zhu and Cescotto (1995) defined the plastic yield surface in the space of the effective stresses.…”

Section: Discussionmentioning

confidence: 99%

Oriented Damage in Ductile Sheets: Constitutive Modeling and Numerical Integration

Omerspahic

Mattiasson

2007

International Journal of Damage Mechanics

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Thermodynamics with internal variables provides a framework for constitutive modeling of elasto-plastic deformations. Within the scope of the theory, constitutive and evolution equations for ductile, elasto-plastic materials with mixed (isotropic and kinematic) hardening and anisotropic damage have been developed. Postulates within continuum damage mechanics were used in order to incorporate damage as an internal variable. Owing to this, and to a simplified definition of the inverted damage effect tensor, a general expression for degradation of the elastic properties in materials has been obtained. The corresponding numerical algorithm for integration of the constitutive equations is based on an elastic predictor -plastic/ damage corrector procedure. The plastic/damage corrector is uncoupled, which further simplifies and expedites the corrector procedure.KEY WORDS: constitutive modeling, anisotropic damage, small strain elasticity, large strain plasticity, mixed hardening, numerical integration.

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“…This approach stated that the elastic strain energy is the same in both configurations, Cordebois and Sidoroff (1979).…”

Section: Damagementioning

confidence: 99%