scholarly journals Damage-to-fracture transition through an Eikonal Non-Local (ENL) continuum damage formulation with embedded strong discontinuities

2019 ◽  
Author(s):  
F Thierry
Keyword(s):  
Continuum Damage ◽  
Strong Discontinuities ◽  
Fracture Transition ◽  
Non Local ◽  
Damage Formulation

A non-local continuum damage approach to model dynamic crack branching

2014 ◽  
Vol 101 (12) ◽  
pp. 933-949 ◽  
Author(s):  
Cyprien Wolff ◽  
Nicolas Richart ◽  
Jean-François Molinari
Keyword(s):  
Crack Branching ◽  
Dynamic Crack ◽  
Continuum Damage ◽  
Non Local

scholarly journals Numerical implementation of a non local criterion to describe the failure of laminates with stress concentrations

2010 ◽  
pp. 89-104
Author(s):  
Stéphanie Miot ◽  
Christian Hochard ◽  
Noël Lahellec
Keyword(s):  
Damage Mechanics ◽  
Continuum Damage Mechanics ◽  
Continuum Damage ◽  
Numerical Implementation ◽  
Stress Concentrations ◽  
Local Criterion ◽  
Mean Values ◽  
Behavioural Model ◽  
Non Local ◽  
The Mean

A non local ply scale criterion was previously developed for predicting the failure of balanced woven ply structures with stress concentrations. This non local criterion was based on the mean values determined over a Fracture Characteristic Volume (FCV). A behavioural model was developed from a classical Continuum Damage Mechanics (CDM) model. The FCV approach and the CDM behavioural model were implemented in ABAQUS and applied to the case of unbalanced woven ply. Comparisons are made between the experimental data and the modelling predictions obtained on plates with open holes, notches and saw cuts. The numerical implementation of this approach is studied in this paper.

scholarly journals A review of non local continuum damage: Modelling of failure?

2014 ◽  
Vol 9 (4) ◽  
pp. 575-597 ◽  
Author(s):  
Gilles Pijaudier-Cabot ◽  
◽  
David Grégoire
Keyword(s):  
Continuum Damage ◽  
Damage Modelling ◽  
Non Local

A mesh objective continuum damage model for quasi-brittle crack modelling and finite element implementation

2019 ◽  
Vol 28 (9) ◽  
pp. 1299-1322 ◽  
Author(s):  
Xiaole Li ◽  
Weicheng Gao ◽  
Wei Liu
Keyword(s):  
Finite Element ◽  
Strain Field ◽  
Damage Mechanics ◽  
Continuum Damage Mechanics ◽  
Tracking Algorithm ◽  
Continuum Damage ◽  
Brittle Crack ◽  
Proposed Model ◽  
Failure Evolution ◽  
Non Local

In the framework of continuum damage mechanics, a computational model for quasi-brittle crack modelling is proposed. The proposed model has significant mesh-objectivity and accuracy advantages over existing methods for modeling quasi-brittle crack. These stem from the combination of the local crack tracking algorithm, the new calculation of crack bandwidth and the non-local treatment regarding strain field. Resorting to the implementation of local crack tracking algorithm, it is desirable that the spurious dependence of conventional continuum damage mechanics-based model on mesh bias can be effectively addressed. The new estimation of the real-time crack bandwidth can be not only depending on the element size and pattern, but also on the physical crack path within each consolidate cracked element. Thus, the energy dissipation during crack propagation can be characterized in a more accurate, physically based manner. The non-local averaging regarding the strain field in the course of failure evolution is carried out within an elliptical domain, the configuration of which is related to finite element and crack trajectory obtained by the local crack track algorithm. With this combined technique, it is expected that a more accurate crack evolution course can be achieved numerically, which allows engineers to adopt relatively coarse unstructured discretizations without sacrificing solution accuracy. By numerical examples, the proposed model, empowered by the combined techniques, demonstrates significant improvements in the prediction of crack propagating of quasi-brittle materials. This model may provide engineers a more reliable tool in practical application of computational material failure.

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