Nonlinear bending of unsymmetric double-layer lattice truss core sandwich beams

Hao, Na, Zhu, Linfeng, Wu, Zhangming ORCID: https://orcid.org/0000-0001-7100-3282 and Ke, Liao-Liang 2024. Nonlinear bending of unsymmetric double-layer lattice truss core sandwich beams. Mechanics Based Design of Structures and Machines 52 (9) , pp. 6462-6483. 10.1080/15397734.2023.2278673

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Abstract

This paper studied the nonlinear bending of unsymmetric double-layer lattice truss core sandwich beams (LTCSBs). Five unsymmetric cases are considered by varying different materials and geometric thicknesses in two layers. To establish a theoretical model for the unsymmetric double-layer LTCSBs, Allen’s model and von Kármán nonlinear theory are employed. The present theoretical model is established by considering the midplane of the mid-sheet as the reference plane. Ritz method is applied to determine the deflection for the nonlinear bending, and verified by the finite element method (FEM). Finally, the effects of the loading direction, unsymmetric factors, and boundary conditions on the nonlinear bending behaviors of LTCSBs are studied. It is found that the nonlinear deflections of unsymmetric LTCSBs may exhibit softening-spring nonlinearity in one direction.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Taylor and Francis Group
ISSN:	1539-7734
Date of First Compliant Deposit:	30 November 2023
Date of Acceptance:	29 October 2023
Last Modified:	07 Nov 2024 06:45
URI:	https://orca.cardiff.ac.uk/id/eprint/164369

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