Prediction of failure modes and peak loads in lattice sandwich panels under three-point loading
| Autor: | Ayumi Omachi, Wesley J. Cantwell, Dai-Heng Chen, Kuniharu Ushijima |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Mechanical Engineering 02 engineering and technology Structural engineering Sandwich panel 021001 nanoscience & nanotechnology Nonlinear finite element analysis Finite element method 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Lattice (order) Ceramics and Composites 0210 nano-technology business Sandwich-structured composite |
| Zdroj: | Journal of Sandwich Structures & Materials. 22:1635-1659 |
| ISSN: | 1530-7972 1099-6362 |
| DOI: | 10.1177/1099636218789605 |
| Popis: | In this study, the failure behaviour of lattice sandwich panels under three-point loading has been studied using a nonlinear finite element analysis. The failure mechanisms of lattice-cored sandwich panels can be classified in three modes; facesheet yielding, facesheet wrinkling and core shear. When the panel fails due to facesheet yielding or core shear, the evaluation of the strength of the lattice-cored panel can be undertaken in the same manner as that of a foam-cored panel. In contrast, when wrinkle-like deformation occurs in the facesheets, the failure load can be estimated from the buckling stress of the facesheet. The failure mode map for the lattice-cored panel with the coordinate system tf / l and [Formula: see text] can be described by the analytical equations that predict the three failure modes. The failure mode map highlights the dominant failure modes for the lattice-cored sandwich panel based on the key design parameters tf / l and [Formula: see text]. |
| Databáze: | OpenAIRE |
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