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Abstract
The paper investigates the post-buckling response of web-core sandwich plates through classical continuum mechanics assumptions. The compressive loading is assumed to be in the direction of the web plates. Equivalent Single Layer (ESL) plate formulation is used with the kinematics of the First order Shear Deformation Theory (FSDT). During the initial, membrane-dominated loading stages, it is observed that the effect of finite size of the periodic microstructure is barely influences the plate responses. At the higher loads, when bending is activated, the finite size of the microstructure activates secondary shear-induced bending moments at the unit cells of the plate. A method to capture the envelope of the maximum values of these bending moments is presented. The findings are validated with the shell element models of the actual 3D-geometry. Finally, the physical limits of the classical continuum mechanics are discussed in the present context.
Original language | English |
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Pages (from-to) | 1287-1302 |
Number of pages | 16 |
Journal | MECCANICA |
Volume | 56 |
Issue number | 6 |
Early online date | 2 Jun 2020 |
DOIs | |
Publication status | Published - Jun 2021 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Plate theory
- Post-buckling
- Sandwich Structures
- Structural design
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Dive into the research topics of 'Post-buckling of web-core sandwich plates based on classical continuum mechanics: success and needs for non-classical formulations'. Together they form a unique fingerprint.Projects
- 1 Finished
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Ultra Lightweight and Fracture Resistant Thin-Walled Structures through Optimization of Strain Paths
Romanoff, J., Berntsson, K., Gallo, P., Körgesaar, M., Palokangas, P. & Reinaldo Goncalves, B.
01/09/2017 → 31/12/2020
Project: Academy of Finland: Other research funding