Mechanics of structure genome-based buckling analysis of sandwich structures. (December 2021)

• Record Type: Journal Article
• Authors: Liu, Ning; Yu, Wenbin
• Is Part Of: Thin-walled structures. Volume 169(2021)
• Publication Date: 2021-12
• Subjects: Buckling -- Sandwich structures -- Mechanics of structure genome -- Bloch-periodic boundary conditions; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2021.108364
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: Sandwich structures are important structural members in modern lightweight engineering. Accurate and effective buckling predictions are vital to the design and optimization of sandwich structures. This paper extends and validates a homogenization theory namely the mechanics of structure genome (MSG) in predicting eigenvalue buckling of sandwich structures under compressive and bending loads. Global buckling is predicted on a homogeneous plate with effective plate properties computed by MSG. Local buckling is predicted by perturbing the fluctuating function of structure gene under Bloch-periodic boundary conditions. Accuracy of buckling predictions is validated by three-dimensional finite element analysis. Highlights: Mechanics of structure genome for global and local buckling of sandwich structures. Buckling of sandwich structures under both compressive load and bending load. Bloch-periodic boundary conditions used in mechanics of structure genome models. New buckling modes including type II flexural modes and torsional modes identified.