Design-oriented mechanical models for local buckling assessment of sandwich panels with metal cores
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Date
2017Type
- Conference Paper
ETH Bibliography
no
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Abstract
Modern design methods for sandwich panels must attempt to maximise the potential of such systems for weight reduction and achieve highly optimised structural components. A successful design method for large-scale sandwich panels requires the consideration of every possible failure mode. An accurate prediction of the various failure modes is not only necessary but it should also be using a simple approach that is suitable for practical application. To fulfil these requirements, a mechanics-based approach is proposed in this paper to assess local buckling phenomena in sandwich panels with metal cores. This approach employs a rotational spring analogy for evaluating the geometric stiffness in plated structures, and it is employed with realistic assumed modes for plate buckling leading to accurate predictions of local buckling. In developing this approach for sandwich panels with metal cores, such as those with a square honeycomb structure, due account is taken of the stiffness of adjacent co-planar and orthogonal plates and its influence on local buckling. In this respect, design oriented models are proposed for core compressive buckling, core shear buckling and top plate intercellular buckling, considering typical metallic core topologies. Finally, the proposed design-oriented models are verified against detailed nonlinear finite element analysis, highlighting the accuracy of buckling predictions and the implications of the post-buckling response. Show more
Publication status
publishedBook title
Proceedings of the 25th UKACM Conference on Computational MechanicsPages / Article No.
Publisher
University of BirminghamEvent
Subject
Metallic sandwich panels; Buckling; Plated structures; Rotational spring analogyOrganisational unit
03655 - Anagnostou, Georgios / Anagnostou, Georgios
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ETH Bibliography
no
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