Damage models
An approach for incorporating classical continuum damage models in state-based peridynamics
... peridynamic damage modeling approaches in the litera- ture are based on permanently modifying the peridynamic influence function by instantly setting it equal to zero and severing the bond when a failure criterion ...
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Crack Tip Equation of Motion in Dynamic Gradient Damage Models
... the damage band structuration and applying the same shape derivative techniques as before to a generalized space-time action integral containing the damage dissipation energy, we identify automatically a ...
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Gradient damage models and their use in brittle fracture
... In damage models, the failure is described by means of an internal variable, the so-called damage variable, which allows to modulate the stiffness of the ...local damage models, the ...
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Gradient damage models coupled with plasticity and their application to dynamic fragmentation
... These models have been originally proposed for quasi-static , but have also been extended to [ 3 , 5 , 27 ] and dynamic loading [ 10 , 8 , 21 ...gradient damage models for brittle softening materials ...
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Are flood damage models converging to “reality”? Lessons learnt from a blind test
... on models’ reliability in the in- vestigated context, estimated losses were compared to ob- served damages derived from ...observed damage to the total damage estimates obtained with the ...
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Gradient damage models and their use to approximate brittle fracture
... continuum models are not suitable to correctly predict damage localization ...local damage models are ill-posed, showing lack of ellipticity and allowing for solutions with damage ...
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Damage Models for Concrete
... nonlocal damage models are easily implemented in finite element codes which uses the initial stiffness or secant stiffness ...local damage model, the nonlocal model requires some additional ...
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Numerical investigation of dynamic brittle fracture via gradient damage models
... ent damage models [ 6 ], here the displacement field u t is governed by the elastic-damage dynamic wave equation ( 10 ...when damage is propa- gating along a specific ...local damage ...
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Comparative study of phenomenological coupled damage models - Application to industrial forming processes
... Damage models Lemaitre’s model [Lemaitre and Desmorat, 2005] define a scalar variable D from which material weakening is described. The energy density release rate Y is the associated thermodynamic ...
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Variational Approach to Dynamic Brittle Fracture via Gradient Damage Models
... Gradient damage models, Variational principles, Finite element imple- mentation 1 Introduction Gradient damage models as formulated in a pure variational setting [1] provide, through strain ...
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An overview of the modelling of fracture by gradient damage models
... gradient damage models and Griffith model of fracture me- chanics relies strongly on the variational structure of both models, hence justifying the necessity to work with standard damage ...
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Non local damage models with evolving internal length: motivations and applications to coupled problems
... ABSTRACT: In most existing proposals, the internal length in non local damage models is a constant parameter. Still, there are some theoretical indications that suggest that the internal length should ...
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Strain-gradient vs damage-gradient regularizations of softening damage models
... and damage-gradient (DG) models, discussing their appropriateness to model fracture of brittle ...“breaks”. Damage models are often regarded as smeared crack models smoothing out this ...
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Numerical bifurcation and stability analysis of variational gradient-damage models for phase-field fracture
... Gradient damage models used in phase-field approaches to brittle fracture are charac- terised by material softening and ...to damage irreversibility, and ii) to select possible stable evolutions ...
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Enriched Damage Models for Continuum Failure Analyses
... Keywords: Damage, isotropy, anisotropy, strain localisation, ...constitutive models coupled to robust computational ...continuous damage models have become among the most popular ...crack ...
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Continuous Damage Models for Fracture of Concrete
... It is with the development of non local (integral and gradient) damage models, that the theory found its widest range of applicability, covering within a single - still[r] ...
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FRACTURE AND PLASTIC MODELS AS Γ-LIMITS OF DAMAGE MODELS UNDER DIFFERENT REGIMES
... particular damage models for linearly elastic ...of damage problems describe the state of the elastic body by means of two functions: the displacement u and an internal variable v, which is defined ...
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Extraction of a crack opening from a continuous approach using regularized damage models
... have been uniformly distributed along the bar, the error would be even higher. Afterwards, the error indicator decreases rapidly to reach a limit value of 4% for the integral approach and 2% for the gradient ...
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One-dimensional Eikonal Non-Local (ENL) damage models: Influence of the integration rule for computing interaction distances and indirect loading control on damage localization
... n−1 w,j ≈ 0. 4.3. Parasite/residual mesh-dependency Features mentioned above make ENL formulations suitable for representing localization processes characterized by a progres- sive transition from diffuse damage ...
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Comparison of damage models in the virtual testing of composites
... progressive damage inside the ply, accounting for fibers breaking, matrix cracking and fiber- matrix ...These models are based on the continuum damage mechanics, and damage variables impacting ...
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