Synergism between layer cracking and delaminations in multidirectional laminates of carbon-fibre-reinforced epoxy

Eggers, H.; Goetting, H.-C.; Bäuml, H.

doi:10.1016/0266-3538(94)90022-1

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…To-date, failure caused by delamination is primarily prevented by using empirically determined criteria during the design and manufacture of components made of fibre reinforced materials. Using these criteria -primarily maximum strains -will help to prevent failure due to delamination but will result in structures which are overdimensioned and thus overweight [3,4]. Hence, for an optimal utilisation of the potential of these materials a damage tolerance approach becomes necessary.…”

Section: Introductionmentioning

confidence: 96%

Delamination growth in CFRP-laminates - Development of a predictive tool based on computational fracture mechanics

Krueger¹,

Koenig²,

Kroeplin³

1997

38th Structures, Structural Dynamics, and Materials Conference

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Specimens from CFRP (Carbon Fibre Reinforced Plastic) laminates, containing artificial delaminations as well as ply cuts at various interfaces, were subjected to tension-tension (R=0.1) and tension-compression (R=-l) fatigue loading and delamination growth was monitored. Local energy release rates along experimentally detected delamination contours were computed, based on results obtained from three dimensional finite element analysis. Plots of measured delamination progression per load cycle versus computed energy release rates have been included in a Paris Law diagram as obtained experimentally using simple specimens for material characterization.Results obtained for delamination growth in a 0°/0° interface suggest that growth prediction based on Paris Law is an approach to be considered. However, other results for specimens where delamination growth occurs between plies of dissimilar orientations indicate that Paris Law parameters determined for a unidirectional interface are not valid in this case. A suitable growth law for a 0°/45° interface could be determined. Growth in this case is considerably slower as compared to the unidirectional case. This is essential when considering a damage tolerance approach for design and operation of CFRP structures.

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Section: Introductionmentioning

confidence: 96%

Delamination growth in CFRP-laminates - Development of a predictive tool based on computational fracture mechanics

Krueger¹,

Koenig²,

Kroeplin³

1997

38th Structures, Structural Dynamics, and Materials Conference

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“…It constitutes a significant improvement over the standard version developed over some 20 years and available in many industrial structural analysis programs [23][24][25][26]. A last step has been done recently in [27] with the mesomodeling of the interaction between microcracking in plies and delamination which is a quite important observed phenomenon [28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

A Virtual Testing Approach for Laminated Composites Based on Micromechanics

Néron¹,

Bainier²

2016

The Structural Integrity of Carbon Fiber Composites

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“…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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Synergism between layer cracking and delaminations in multidirectional laminates of carbon-fibre-reinforced epoxy

Cited by 5 publications

References 12 publications

Delamination growth in CFRP-laminates - Development of a predictive tool based on computational fracture mechanics

Delamination growth in CFRP-laminates - Development of a predictive tool based on computational fracture mechanics

A Virtual Testing Approach for Laminated Composites Based on Micromechanics

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

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