An enhanced beam-theory model of the asymmetric double cantilever beam (ADCB) test for composite laminates

Bennati, Stefano; Colleluori, Massimiliano; Corigliano, Domenico; Valvo, Paolo Sebastiano

doi:10.1016/j.compscitech.2009.01.019

Cited by 110 publications

(69 citation statements)

References 28 publications

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“…Their solution can be used also for the analysis of delamination in composite laminates, if the interface is interpreted as a conventional means to account for the laminate transverse deformability and not as representative of a physical layer of adhesive. The modal contributions to the energy release rate can be expressed as [34]: and…”

Section: Elastic-interface Modelsmentioning

confidence: 99%

“…Besides the adoption of a more or less refined structural theory for the sublaminates, the connection between them has to be suitably described. To this aim, models of growing complexity can be chosen, ranging from rigid connections [15][16][17][18][19][20][21][22][23][24] to elastic interfaces [25][26][27][28][29][30][31][32][33][34][35][36][37][38] and cohesive zone models [39][40][41][42][43][44][45][46][47]. This choice is relevant not only for the accurate prediction of the laminate structural response -e.g.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Shear on Mode II Delamination

Valvo

2018

Frattura Ed Integrità Strutturale

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ABSTRACT. The paper focuses on the effects of shear deformation and shear forces on the mode II contribution to the energy release rate in delaminated beams. A critical review of the relevant literature is presented, starting from the end-notched flexure test as the prototype of delaminated laminates subjected to pure mode II fracture. Several models of the literature are recalled from simple beam theory to more refined models. The role of first-order shear deformation in line with the Timoshenko beam theory is investigated as distinct from the local crack-tip deformation related to the shear modulus of the material. Then, attention is moved on to a general delaminated beam with an arbitrarily located through-the-width delamination, subjected to mixedmode fracture. Several fracture mode partition methods of the literature are reviewed with specific attention on the effects of shear on the mode II contribution to the energy release rate.KEYWORDS. Delamination; Mixed-mode fracture; Mode II fracture; Beam theory; Shear deformation; End-notched flexure test.Citation: Valvo, P.S., The effects of shear on Mode II delamination: a critical review,

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Section: Elastic-interface Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effects of Shear on Mode II Delamination

Valvo

2018

Frattura Ed Integrità Strutturale

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“…Most of these methods establish an energy partition based on the local singular field ahead of the crack tip or on a global method. There are other approaches in the scientific literature as that developed by Bennati et al (2009) based on the Timoshenko's beam theory applied to an idealised continuous distribution of elasticbrittle springs between the sublaminates.…”

Section: Introductionmentioning

confidence: 99%

Comparison of numerical, empirical and local partition methods in ADCB specimens

Mollón

Bonhomme

Elmarakbi

et al. 2015

IJAUTOC

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It is well-known from the scientific literature that the asymmetric double cantilever beam (ADCB) specimen is subjected to mixed-mode I/II load at the crack tip. In these samples, the crack plane lies outside the laminate midplane. In this work, the energy release rate in modes I and II (G I and G II ) are obtained by different approaches. The analytical determination of G I and G II in ADCB samples is not simple or straightforward and is usually based on partition methods. Numerical results obtained from finite element analysis (FE) are compared with the analytical local partition method (LP) for a carbon fibre epoxy AS4/3501-6 laminate. Both results are also compared with an empirical formulation obtained in previous works. Results obtained from all three methods are in good agreement.

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“…In this paper some basic problems are analyzed, which are in fact simple, but -to telling the truthnot available in the literature and could be useful for those who face to the J-integral application for the first time. Four examples are considered here: the mode-I double-cantilever beam (DCB) [8][9][10][11][12][13][14][15][16], the mode-II end-notched flexure (ENF) specimen [14,15,17,18] and the mixed-mode I/II single-leg bending (SLB) system [14,15,17,18]. Finally, a simply-supported delaminated elastic plate subjected to a point force is analyzed.…”

Section: Introductionmentioning

confidence: 99%

J-integral for delaminated beam and plate models

Szekrényes

2012

Per. Pol. Mech. Eng.

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In this work the J-integral is applied to calculate the energy release rate in simple beam and plate models. Four examples are considered: the mode-I double-cantilever beam, the mode-II end-notched flexure, the mixed-mode I/II single-leg bending specimens and a delaminated plate with simply-supported edges, respectively. In each example the details of calculation are given, in the latter case the distribution of the energy release rate along the crack front is calculated. While for delaminated beams the literature presents the energy release rates in numerous studies, the J-integral calculation is not trivial in theses cases. Moreover for delaminated bent plates the application of the J-integral is not documented. It is shown that considering the classical plate theory there are serious limitations to calculate representative energy release rates.Keywords composite · J-integral · beam theory · plate theory · energy release rate distribution Acknowledgement

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An enhanced beam-theory model of the asymmetric double cantilever beam (ADCB) test for composite laminates

Cited by 110 publications

References 28 publications

The Effects of Shear on Mode II Delamination

The Effects of Shear on Mode II Delamination

Comparison of numerical, empirical and local partition methods in ADCB specimens

J-integral for delaminated beam and plate models

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