The stabilizing effects of fiber bridges on delamination cracks

Daridon, Loïc; Zidani, Kamel

doi:10.1016/s0266-3538(01)00181-6

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…Then, this geometric instability can lead to an increase in interlaminar stresses, an acceleration of the delamination rate and, eventually, to the failure of the structure. The first analytical studies of buckling and delamination growth in the 70-80's were done by [15,8,5,13]; in the last decade, new analytical studies were proposed by [12,28,19]. In a finite element context, the first works were based on fracture mechanics [30,32,27] while in more recent publications cohesive models were also used to deal with geometrically nonlinear problems [7,1,29].…”

Section: Introductionmentioning

confidence: 99%

On a multiscale strategy and its optimization for the simulation of combined delamination and buckling

Saavedra

Allix

Gosselet

2012

Numerical Meth Engineering

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International audienceThis paper investigates a computational strategy for studying the interactions between multiple through-the-width delaminations and global or local buckling in composite laminates taking into account possible contact between the delaminated surfaces. In order to achieve an accurate prediction of the quasi-static response, a very refined discretization of the structure is required, leading to the resolution of very large and highly nonlinear numerical problems. In this paper, a nonlinear finite element formulation along with a parallel iterative scheme based on a multiscale domain decomposition are used for the computation of 3D mesoscale models. Previous works by the authors already dealt with the simulation of multiscale delamination assuming small perturbations. This paper presents the formulation used to include geometric nonlinearities into this existing multiscale framework and discusses the adaptations that need to be made to the iterative process in order to ensure the rapid convergence and the scalability of the method in the presence of buckling and delamination. These various adaptations are illustrated by simulations involving large numbers of DOFs

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Section: Introductionmentioning

confidence: 99%

On a multiscale strategy and its optimization for the simulation of combined delamination and buckling

Saavedra

Allix

Gosselet

2012

Numerical Meth Engineering

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“…This type of model is often used to model initiation of composite delamination [17][18][19] or crack propagation using CZM. The chosen damageable interface law is the classical "triangle" damageable elastic model [20][21][22]. However, it must be noticed that extensions of such an analysis to multiaxial loadings and/or non-linear cohesive law [23,24] can be considered using the same approach.…”

Section: Introductionmentioning

confidence: 99%

Solving fracture problems using an asymptotic numerical method

Daridon

Wattrisse

Chrysochoos

et al. 2011

Computers & Structures

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The present work deals with the use of asymptotic numerical methods (ANM) to manage crack onset and crack growth in the framework of Continuum Damage Mechanics (CDM). More specifically, an application of regularization techniques to a 1D cohesive model is proposed. The standard "triangle" damageable elastic model, often used in finite element codes to describe fracture of brittle materials, was chosen. Results associated with load-unload cycle showed that ANM is convenient to take numerically this specific non regular behaviour into account.Moreover, the present paper also shows that the chosen damageable interface model can be introduced in the generalized standard material formalism which unables us to define a complete energy balance associated with the damage process. In such a framework, the new damage state variable is a displacement. Finally, a 1D finite element application to a simple elastic damageable structure is shown to emphasize the potentialities of such an approach.

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“…Due to the complex interaction of material, geometry and various failure mechanisms, finite element procedures are widely used for buckling analysis [15][16][17][18][19][20][21][22]. However, the finite element method takes the disadvantages of considerable numerical computation, one solution to a specific case, and no explicit close form.…”

Section: Introductionmentioning

confidence: 99%

Approximate Analysis of the Buckling Behavior of Composites with Delamination

Shan

Pelegri

2003

Journal of Composite Materials

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In this paper, we provide an insight into the governing mechanism of the uni-axial compressive bucklingof a delaminated composite. We propose an approximate method to analyze the bucklingbehavior as the first step to further investigate the effect of contact zone at the ends of a delamination. The agreement of the analytical results with experiments in critical values of relative axial displacement verifies our model and approach. The proposed method provides a simple and effective way to calculate the forces, moments and energy required for the processes of local and global buckling. Moreover, the effect of the thickness ratio, T/ h, on the total strain energy can be studied in a continuous range of values, while other methods investigate this parametric effect discretely. The effect of delamination length and position in the buckling behavior are also investigated. The analytical results compare favorably with results of similar, but more elaborate, studies.

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The stabilizing effects of fiber bridges on delamination cracks

Cited by 8 publications

References 21 publications

On a multiscale strategy and its optimization for the simulation of combined delamination and buckling

On a multiscale strategy and its optimization for the simulation of combined delamination and buckling

Solving fracture problems using an asymptotic numerical method

Approximate Analysis of the Buckling Behavior of Composites with Delamination

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