Variational analysis of transverse cracking and local delamination in [θm/90n]s laminates

Zhang, Hui; Minnetyan, Levon

doi:10.1016/j.ijsolstr.2006.03.004

Cited by 27 publications

(11 citation statements)

References 18 publications

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“…Numerical results have shown that stiffness reduction of the 90 ply strongly depends upon the orientation of the adjacent ply group, with the remote constraining layer having negligible influence. Zhang and Minnetyan (2006) developed a displacement-based variational model to study the effect of transverse cracking and local delamination in symmetric composite laminates, assuming the crack shape to be a function of crack density and delamination length. Using a variational approach, they examined the effect of delamination on the effective Young's modulus of the laminate and the strain energy release rate.…”

Section: Residual Stiffness Of Composite Laminate With Crack-induced mentioning

confidence: 99%

Analysis of delamination in laminates with angle-ply matrix cracks

Kashtalyan

Soutis

2015

Structural Integrity and Durability of Advanced Composites

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Section: Residual Stiffness Of Composite Laminate With Crack-induced mentioning

confidence: 99%

Analysis of delamination in laminates with angle-ply matrix cracks

Kashtalyan

Soutis

2015

Structural Integrity and Durability of Advanced Composites

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“…Considering an interface j (in this case, a 3D matrix layer of thickness H e 20 , where H e is the thickness of the elementary ply) between two cracked plies S i and S i+1 , the upper part S + and the lower part S − of the laminate are homogenized. Periodic boundary conditions are defined.…”

Section: The Bridge Between Micromechanics and Mesomechanicsmentioning

confidence: 99%

“…The description of the interaction between delamination and transverse microcracking is a rather ancient question in micromechanics [13][14][15][16][17][18][19][20][21][22]. In all the referred works, two-dimensional discrete models are used.…”

Section: Introductionmentioning

confidence: 99%

A micromechanics-based interface mesomodel for virtual testing of laminated composites

Daghia

Abisset

2014

Adv Model Simul Eng Sci

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Background:The prediction of the behavior of laminated composite structures up to final fracture continues to be a challenge today. Indeed, failure may occur due to the interaction of small-scale degradations, such as transverse intraply cracks and interface delamination, which are difficult to account for in calculations on the structure's scale. Methods: Here, in order to model the interaction of intralaminar and interlaminar degradations, we develop a new and relatively simple micromechanics-based interface mesomodel which differs from classical cohesive interface models, since it includes the coupling between transverse intraply cracks and interface delamination. Results: The new interface model was implemented in a finite element code and used in the simulation of tensile tests on unnotched and holed specimens. Simulations with a classical cohesive interface model (not including coupling) were also carried out. Conclusions: The simulations highlight the need for introducing intra-/interlaminar's behavior coupling in order to accurately predict the damage evolution and failure stress and mode.

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“…This damage phenomena has been widely addressed by micro-mechanical approaches in the literature; mostly by analytical methods [1][2] and especially by shear-lag method [3][4][5][6] . Variational technique [7][8][9] and finite element methods [10][11] have been generally used for deriving the stress distribution at the 90˚/0˚ interface. Each method contains specific assumptions and outcome with considerable progress in the field 12 .…”

Section: ) Introductionmentioning

confidence: 99%

Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elements

Jalalvand

Hosseini‐Toudeshky

Mohammadi

2012

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper is devoted to the modeling of spread kind of damages such as matrix cracking and induced delamination in symmetric and asymmetric cross-ply laminates of composite materials using cohesive elements. For matrix crack modeling, parallel rows of cohesive elements are used between every row of 2D elements in 90˚ layers. Delamination is also modeled by cohesive elements at the 90˚/0˚ interface. Since matrix cracking is a diffuse kind of damage mechanism, application of cohesive elements is not straightforward, and special techniques are necessary to resolve the modeling difficulties. For this purpose, two techniques of "bisecting" and "random distribution of strength of cohesive elements" are proposed here. Both techniques are applied to various symmetric laminates of [0/90 3 ] s and [90 n /0] s (n=1 to 3). The predicted stiffness and damage progresses from both techniques are in good agreement with the experimental results. Then, asymmetric cross-ply laminates of [90 n /0] (n=1 to 3) are analyzed to show the capability of this method in progressive damage analyses. The proposed method is less restricted in comparison with available micromechanical methods and is able to predict damage initiation, propagation and damagemode transition for any symmetric and asymmetric cross-ply sequence. Therefore, this method can be used for development of "in-plane damage" constitutive laws especially when specimens are subjected to complex loading and boundary conditions.

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Variational analysis of transverse cracking and local delamination in [θm/90n]s laminates

Cited by 27 publications

References 18 publications

Analysis of delamination in laminates with angle-ply matrix cracks

Analysis of delamination in laminates with angle-ply matrix cracks

A micromechanics-based interface mesomodel for virtual testing of laminated composites

Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elements

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