A variational model for free-edge interlaminar stress analysis in general symmetric and thin-ply composite laminates

Hajikazemi, M.; Paepegem, Wim Van

doi:10.1016/j.compstruct.2017.10.012

Cited by 32 publications

(13 citation statements)

References 27 publications

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“…Becker found closed-form solutions for free-edge effects in cross-ply laminates [72] and Becker and Kress [73] considered the stiffness reduction in laminate coupons due to the free-edge effect. More recent research is due to Mittelstedt and Becker [74], Dhanesh et al [75], and Hajikazemi and Paepegem [76]. We mention this research on flat laminates as an introductory analogy because we did not find a systematic study on free-edge effects of corrugated laminates.…”

Section: Free-edge Effectsmentioning

confidence: 95%

Free-edge effects of corrugated laminates

Filipovic

Kress

2020

Curved and Layered Structures

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Due to their high numerical efficiency, homogenization models are often employed in the analysis of corrugated laminates. They are usually derived assuming periodic behavior in the corrugated direction and generalized plane strain in the out-of-plane direction, which corresponds to the assumption of infinite dimensions of the structure. As a consequence, any influences of edge effects are not mapped, although they can have a significant impact on the mechanical behavior of a given structure. The objective of this manuscript is to investigate the influence of boundary conditions - a combination of free-edges and clamping - on the structural stiffness of corrugated laminates. A total of six load cases are investigated which correspond to the line loads considered in the classical theory of laminated plates. The results of this parameter study allow the identification of several critical loading situations, where free edges can significantly alter structural stiffness. The given investigations hence contribute to the investigation of the validity range of homogenization models.

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Section: Free-edge Effectsmentioning

confidence: 95%

Free-edge effects of corrugated laminates

Filipovic

Kress

2020

Curved and Layered Structures

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“…Schnabel et al 21 presented an analysis method for the determination of displacement, strain, and stress fields in cylindrically curved cross-ply laminates under bending load, and their method was compared to the results of finite element simulations in good agreement. Hajikazemi and Van Paepegem 22 developed a variational model to determine stress and displacement fields at free edges of symmetric composite laminate strips under thermomechanical loads, and the method is also applicable to thin-ply laminates. Vukasovicé t al.…”

Section: Introductionmentioning

confidence: 99%

Analytic solution of angle-ply laminated plates under extension, bending, and torsion

Hsu

et al. 2019

Journal of Composite Materials

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This paper develops a Hamiltonian state space approach for analytic determination of deformation and stress fields in multilayered monoclinic angle-ply laminates under the combined action of extension, bending, and torsion. The present solution satisfies the equations of anisotropic elasticity, the end conditions, the traction-free boundary conditions on the four edge surfaces of the rectangular section, and the interfacial continuity conditions in multilayered laminates. The proposed method only requires the solutions of matrix and eigen equations, regardless of the number or lamination of the layers. The finite element analyses are used to validate the accuracy of the analysis. The analytical solution and the numerical solutions are in excellent agreement.

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“…The problem of out-of-plane stresses associated with the edge effect has been studied since the pioneering work of Pipes and Pagano in 1970 [25] and continues to the present day [10,17,26]. A review of the state of the art of this subject can be found in [27] and [28].…”

Section: Introductionmentioning

confidence: 99%