Buckling and Post-Buckling of Multi-Material Metastructure Panels
Riccardo AUGELLO, Erasmo CARRERA
Abstract. This paper investigates the buckling and post-buckling response of multi-material metastructure panels. The main objective is to clarify how the local allocation of materials with different stiffness properties affects the global stability of the panel, the critical buckling load, the dominant instability modes, and the nonlinear equilibrium path. The panel is modeled as a heterogeneous metastructured assembly in which different regions or groups of unit cells are assigned different constituent materials. This modeling strategy allows the influence of material contrasts on load redistribution, stiffness degradation, and deformation localization in the post-critical regime to be systematically assessed. The numerical formulation is based on the Carrera Unified Formulation (CUF), which provides a hierarchical and flexible framework for the refined modeling of complex structural systems. Thanks to its variable-kinematics capabilities, CUF enables accurate descriptions of both global panel deformation and local effects induced by the metastructure topology, while reducing the computational effort with respect to full three-dimensional finite element models. The results aim to provide insight into the role of multi-material distributions in governing the stability response of metastructure panels and to support the development of lightweight architected structures with tailored buckling and post-buckling performance.
Keywords
Multi-Material Metastructures, Buckling, Post-Buckling, Carrera Unified Formulation, Nonlinear Finite Element Analysis
Published online 11/8/2026, 6 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Riccardo AUGELLO, Erasmo CARRERA, Buckling and Post-Buckling of Multi-Material Metastructure Panels, Materials Research Proceedings, Vol. 73, pp 217-222, 2026
DOI: https://doi.org/10.21741/9781644904459-42
The article was published as article 42 of the book Mechanics of Advanced Materials and Structures
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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