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Communication Dans Un Congrès Année : 2000

Influence of scale effects on the buckling of sandwich structures

Résumé

The growing use of sandwich structures requires new advances in the understanding of their mechanical behaviour and more especially in their buckling modes. The difficulty of predicting geometrical instabilities in such materials lies in their co-existence at two different scales : the sandwich scale and the skin scale. The classical approach is an uncoupled one in which the buckling at both scales is captured through two different models. In order to account for instabilities at both scales, a refined kinematics-based model is presented. Thanks to a higher-order theory, the complex behaviour of each component of the sandwich material can be described. The linearised problem is solved through an eigenvalue problem yielding three distinct critical loads. Two of them are associated with an anti-symmetrical mode, respectively a global (Euler's type) and local one. The third critical load corresponds to a symmetrical wrinkling instability. The second step of the study will consist in investigating the so called interactive buckling in a non-linear framework.
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Dates et versions

hal-00981953 , version 1 (23-04-2014)

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  • HAL Id : hal-00981953 , version 1

Citer

Lionel Leotoing, Sylvain Drapier, Alain Vautrin. Influence of scale effects on the buckling of sandwich structures. XXth ICTAM, Aug 2000, Chicago, United States. ⟨hal-00981953⟩

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