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

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

12 Lataukset (Pure)

Abstrakti

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.

AlkuperäiskieliEnglanti
Sivumäärä16
JulkaisuMECCANICA
DOI - pysyväislinkit
TilaSähköinen julkaisu (e-pub) ennen painettua julkistusta - 2 kesäkuuta 2020
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Projektit

    Ultrakevyet ja -kestävät ohuetseinäiset rakenteet venymäpolkujen optimoinnin avulla

    Romanoff, J., Palokangas, P., Berntsson, K., Reinaldo Goncalves, G. & Gallo, P.

    01/09/201731/12/2020

    Projekti: Academy of Finland: Other research funding

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