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Zhangxian Yuan, G. Kardomateas, Y. Frostig (2016)
Geometric Nonlinearity Effects in the Response of Sandwich Wide PanelsJournal of Applied Mechanics, 83
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Wrinkling of sandwich wide panels/beams based on the extended high-order sandwich panel theory: formulation, comparison with elasticity and experimentsArchive of Applied Mechanics, 82
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Dynamic extended high order sandwich panel theory for transient response of sandwich beams with carbon nanotube reinforced face sheetsAerospace Science and Technology, 56
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Geometrically nonlinear extended high order analysis for sandwich beams based on elastic–plastic core shear behaviorAerospace Science and Technology, 39
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Zhangxian Yuan, G. Kardomateas (2018)
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Low velocity impact response of sandwich beams with soft cores and carbon nanotube reinforced face sheets based on Extended High Order Sandwich Panel TheoryAerospace Science and Technology, 66
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Catherine Phan, Y. Frostig, G. Kardomateas (2012)
Analysis of Sandwich Beams With a Compliant Core and With In-Plane Rigidity—Extended High-Order Sandwich Panel Theory Versus ElasticityJournal of Applied Mechanics, 79
A new theory developed from extended high-order sandwich panel theory (EHSAPT) is set up to assess the static response of sandwich panels by considering the geometrical and material nonlinearities simultaneously. The geometrical nonlinearity is considered by adopting the Green–Lagrange-type strain for the face sheets and core. The material nonlinearity is included as a piecewise function matched to the experimental stress–strain curve using a polynomial fitting technique. A Ritz technique is applied to solve the governing equations. The results show that the stress stiffening feature is well captured in the geometric nonlinear analysis. The effect of the geometric nonlinearity in the face sheets on the displacement response is more significant when the stiffness ratio of the face sheets to the core is large. The geometric nonlinearity decreases the shear stress and increases the normal stress in the sandwich core. By comparison with open literature and finite element simulations, the present nonlinear EHSAPT is shown to be sufficiently precise for estimating the nonlinear static response of sandwich beams by considering the geometric and material nonlinearities simultaneously.
"Acta Mechanica Sinica" – Springer Journals
Published: Feb 18, 2020
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