Study on shear postbuckling failure of composite sandwich plates by a quasi-conforming finite element method

Li, Dong; Bao-zong, Huang

doi:10.1016/j.compscitech.2015.09.019

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…The convergence of the finite element is shown in terms of the errors between the buckling loads and the analytical solutions in Figure 3. 52 The results show that only 4*4 meshing is enough to get a high accuracy.…”

Section: Validity Of the Proposed Methodsmentioning

confidence: 96%

Section: Postbuckling Solution Methodsmentioning

confidence: 99%

“…A simply supported sandwich panel under axial compression load is considered to verify the validity of the proposed method. 52 The material and geometric parameters of sandwich panel are assumed as follows:…”

Section: Validity Of the Proposed Methodsmentioning

confidence: 99%

“…According to the simplified zig-zag model, 52 for moderate rotation the displacements of plates, in-plane Green strain at arbitrary point and transverse shear strain of the core are as followswhere s = 1, r = 0 for core, s = 0, r = ±12 for upper and lower face sheets, respectively. uα and w are the displacements of the mid-plane.…”

Section: Model and Solutionmentioning

confidence: 99%

“…Later, based on the nonlinear Z-ZT, Sahoo and Singh 51 proposed a more accurate zig-zag element in analyzing the free vibration of thick sandwich plates. Li et al 52 applied a refined first order shear theory to linear zig-zag model and present a simpler quasi-conforming finite element with 7 degrees of freedom (DOF) per node, equivalent to the zig-zag element with 11 DOF in precision.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Validity Of the Proposed Methodsmentioning

confidence: 96%

Section: Postbuckling Solution Methodsmentioning

confidence: 99%

Section: Validity Of the Proposed Methodsmentioning

confidence: 99%