Post-buckling of web-core sandwich plates based on classical continuum mechanics: success and needs for non-classical formulations

Jani Romanoff*, Jasmin Jelovica, J. N. Reddy, Heikki Remes

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
28 Downloads (Pure)

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 languageEnglish
Pages (from-to)1287-1302
Number of pages16
JournalMECCANICA
Volume56
Issue number6
Early online date2 Jun 2020
DOIs
Publication statusPublished - Jun 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Plate theory
  • Post-buckling
  • Sandwich Structures
  • Structural design

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