Delamination buckling of flat laminates

Simitses, George J.

doi:10.1007/978-94-011-1228-4_9

Cited by 16 publications

(6 citation statements)

References 62 publications

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“…The constants were solved simultaneously using equations ( 5), ( 6), (8), and (9). The major coupling stiffnesses B ij are kept in the constants α ij , β ij , and φ ij so that they automatically become zero when a symmetrically laminated beam/column is encountered…”

Section: Appendix: Expressions For the Constants C Ij In Equation (10)mentioning

confidence: 99%

“…In addition, the current research into the buckling of delaminated composite beams is growing exponentially [9][10][11][12][13][14], and there is a need to include the effect of composite coupling in the mathematical modelling. The ability to predict how coupling responses in composite structures affect the load carrying capacity thus becomes very urgent and important.…”

Section: Introductionmentioning

confidence: 99%

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Bending and buckling of a generally laminated composite beam-column

Chai

Yap

Lim

2009

Proceedings of the Institution of Mechanical Engineers, Part L:

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This article reports the structural responses of generally laminated composite columns subjected to uni-axial compression and transverse load. Closed-form expressions were developed and are presented in this contribution to analyse buckling and bending responses of generally laminated composite beams with various boundary supports. The expressions were developed using a combination of the Euler—Bernoulli beam and the classical lamination theory. In addition, the results of a complementary experimental study are presented and are used to validate the analytical models. The comparison of the analytical results with the experimental results shows good correlation in general. Some interesting preliminary results obtained in the analysis of the beam-column are also presented, noted, and discussed.

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Section: Appendix: Expressions For the Constants C Ij In Equation (10)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending and buckling of a generally laminated composite beam-column

Chai

Yap

Lim

2009

Proceedings of the Institution of Mechanical Engineers, Part L:

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show abstract

“…Research on delamination has been an active topic 2 , and large amounts of works are found in the literatures, including analytical models, experimental studies and numerical s i m u l a t i o n s . C o m p r e h e n s i v e reviews on fracture analysis of delaminated composites can be found in literatures [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

A Novel Beam Model for Mode-II Delamination Analysis of Composite Laminates

Han

Zhang

2012

Polymers and Polymer Composites

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A two dimensional beam model is proposed for delamination analysis of composite laminates, where Timoshenko's plane cross-section assumption is abandoned, and the longitudinal displacement of the beam is proposed as continuous functions of the transverse and the longitudinal coordinates, to match shear deformations. Moreover, the composite laminate is modeled as upper and lower sub-beam through the delamination interface, and corresponding conditions for interface sliding are satisfied through a generalized variational theory. The accuracy of the results of this analytical model is verified by comparison with those from three dimensional finite element models. Furthermore, the influences of delamination depth, length, central position and modulus mismatch ratio (E1/E2) of the upper and lower sublaminate to the energy release rate are discussed.

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“…In the past, many researchers had published work on the effect of delamination on the load-carrying capacity of the composites. The two earliest and well-known papers are by Simitses [1] and Simitses et al [2]. They developed a one-dimensional mathematical model to simulate a flat laminated plate with a through-the-width delamination.…”

Section: Introductionmentioning

confidence: 99%

“…They developed a one-dimensional mathematical model to simulate a flat laminated plate with a through-the-width delamination. This model was believed to be sufficient to describe the buckling behaviour of the laminated plate and Simitses [1] also considered the effect of delamination growth. Many notable papers on composite beams with single delamination and multiple delaminations appeared later and the type of approach proposed ranged from analytical and finite-element work to experimental work [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of flexural stiffness estimates on the buckling load of delaminated composite beams

Yap

Chai

MSRao

2008

Proceedings of the Institution of Mechanical Engineers, Part L:

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A closed-form expression to determine the effective flexural modulus for a laminated composite beam is derived and presented in this paper. An approach based on the established Euler -Bernoulli beam theory with the proposed effective flexural modulus to predict the buckling load of the laminated composite beam is also presented in detail.The problem of a laminated beam with no delamination and that with a single through-thewidth delamination is analysed. The results obtained using the current expression are compared with those obtained using existing expressions found in the literature. Results from a non-linear finite-element analysis are also presented and included in the comparison. The parameters investigated include ply orientation, number of layers, delamination length, support conditions, and material property.The comparison of results showed that the current estimated effective flexural stiffness expression yields a good lower bound solution for predicting the buckling load of both the perfect and the delaminated laminated composite beam.

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Delamination buckling of flat laminates

Cited by 16 publications

References 62 publications

Bending and buckling of a generally laminated composite beam-column

Bending and buckling of a generally laminated composite beam-column

A Novel Beam Model for Mode-II Delamination Analysis of Composite Laminates

Effect of flexural stiffness estimates on the buckling load of delaminated composite beams

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