Local shear buckling and bearing strength in web core sandwich panels: Model and experimental validation

Briscoe, Casey R.; Mantell, Susan C.; Okazaki, Taichiro; Davidson, Jane H.

doi:10.1016/j.engstruct.2011.10.020

Cited by 14 publications

(5 citation statements)

References 5 publications

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“…The volume averages are Thus, with these average values the underlined terms in equilibrium Eqs. (18) and (19) and differential Eqs. (24) and (25) based on displacements become zero.…”

Section: Unit Cell Analysis For Out-of-plane Shearmentioning

confidence: 99%

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Post-buckling of web-core sandwich plates based on classical continuum mechanics: success and needs for non-classical formulations

et al. 2020

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The paper investigates the post-buckling response of web-core sandwich plates through classical continuum mechanics assumptions. The compressive loading is assumed to be in the direction of the web plates. Equivalent Single Layer (ESL) plate formulation is used with the kinematics of the First order Shear Deformation Theory (FSDT). During the initial, membrane-dominated loading stages, it is observed that the effect of finite size of the periodic microstructure is barely influences the plate responses. At the higher loads, when bending is activated, the finite size of the microstructure activates secondary shear-induced bending moments at the unit cells of the plate. A method to capture the envelope of the maximum values of these bending moments is presented. The findings are validated with the shell element models of the actual 3D-geometry. Finally, the physical limits of the classical continuum mechanics are discussed in the present context.

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“…The volume averages are Thus, with these average values the underlined terms in equilibrium Eqs. (18) and (19) and differential Eqs. (24) and (25) based on displacements become zero.…”

Section: Unit Cell Analysis For Out-of-plane Shearmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13]. These unidirectional plates, especially in the form of steel sandwich plates, have been found to have excellent mechanical properties for buckling, bending and impact loads [14][15][16][17][18][19][20][21]. These structures are, however, challenging in terms of structural analysis.…”

Section: Introductionmentioning

confidence: 99%

Post-buckling of web-core sandwich plates based on classical continuum mechanics: success and needs for non-classical formulations

et al. 2020

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“…Mahfuz et al 19 considered the influence of core materials and debonding on the critical load and adopted the finite element method to try to determine the critical load and buckling behavior of sandwich plates loaded in-plane with different materials and geometry. Briscoe et al 20,21,22 carried out the numerical analysis and experimental studies on the global and local buckling of structures by using different models. Kardomateas et al 23, 24 studied the global buckling and wrinkling mode of sandwich plates, and provided a method for accurately evaluating the limitations of simplified analysis in predicting wrinkling and global buckling of wide sandwich plates/beams.…”

Section: Introductionmentioning

confidence: 99%

Effects of parameters on postbuckling failure of composite sandwich panels loaded axially: Function form and applications

Bao-zong

2023

Jnl of Sandwich Structures & Materials

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Based on the refined first-order shear theory (simplified zig-zag model), using quasi-conforming finite element method with path-following and switching approach, the postbuckling behaviors and postbuckling bearing capacity (PBC) of composite sandwich panels (CSPs) axially loaded were studied and discussed in detail. To utilize the carrying potential of CSPs in postbuckling, the effects of the key parameters on postbuckling behaviors of the CSPs were analyzed by finite element method. The numerical results show that the PBC of CSPs increases with the increase of face sheets thickness, core thickness and core shear modulus, but it is insensitive to the change of the side length ratio. The enhancement of core shear strength can increase the PBC of CSPs and change the failure mode, but it is found there is a threshold value, beyond which, the PBC will no longer or slightly increases with the increase of core shear strength. The failure of CSPs is mainly determined by the tensile strength in the direction perpendicular to the fiber. Finally, a parameter selection optimization approach is proposed to effectively improve the PBC of CSPs under axial compression.

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“…Global buckling phenomena were predicted accurately by ESL model representing sandwich panel with defining correctly bending and transverse shear stiffnesses [10]. An accurate representation of the panel's behavior requires an understanding of the bending and transverse shear stiffnesses of the skins and core [11]. Bending stiffness relates to the panel's resistance to bending deformations, while transverse shear stiffness accounts for shear deformations within the core.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Single Layer Approach for Buckling Analysis of Stiffened Panel Under Bi-Axial Compression and Lateral Pressure

Putranto,

Yulianto,

Purwanto

et al. 2023

IJMEIR

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⎯ Ship structures consisting of stiffened plates are subjected to several loading conditions during service, which can lead to buckling. As a result of panel buckling, the overall strength of the ship hull girder is reduced, which is what determines the ultimate strength of the hull girder. The ultimate strength analysis can be accomplished with finite element (FE) simulation, but detailed modeling can be time-consuming. Due to these reasons, it is more advantageous and costeffective to replace the three-dimensional (3D) stiffened panel model with a two-dimensional (2D) equivalent single layer (ESL) plate. This shift from 3D to 2D is premised on the ESL accuracy in describing the various buckling modes of stiffened panels, which are determined by panel topology and boundary conditions. Therefore, the performance of a stiffened panel represented by an equivalent single layer plate (ESL) is evaluated in different modes of buckling. Considering that ESL is asymmetric in nature, the buckling modes of stiffened panels are significantly affected by any modification to their geometry. In this paper, we are concerned with two modes of buckling: (i) plate and web stiffeners buckle locally, and (ii) buckling of the stiffeners due to lateral-torsional forces. According to the results, ESL is capable of accurately predicting the effect of local buckling in combination of biaxial compression and lateral pressure.

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Local shear buckling and bearing strength in web core sandwich panels: Model and experimental validation

Cited by 14 publications

References 5 publications

Post-buckling of web-core sandwich plates based on classical continuum mechanics: success and needs for non-classical formulations

Post-buckling of web-core sandwich plates based on classical continuum mechanics: success and needs for non-classical formulations

Effects of parameters on postbuckling failure of composite sandwich panels loaded axially: Function form and applications

Equivalent Single Layer Approach for Buckling Analysis of Stiffened Panel Under Bi-Axial Compression and Lateral Pressure

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