Mechanical Behavior of Sandwich Materials Under Concentrated Loads

Kaja Sofie Lamvik; Dimitrios G. Pavlou

doi:10.15866/ireme.v12i2.13480

Mechanical Behavior of Sandwich Materials Under Concentrated Loads

Kaja Sofie Lamvik⁽¹⁾, Dimitrios G. Pavlou^(2*)

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/ireme.v12i2.13480

Abstract

Automotive and aerospace industry have benefited from advanced materials to improve the stiffness of the structures and reduce the weight. Sandwich materials are widely used for designing advanced structures due to their excellent capacity to carry bending moments. However, special techniques are required to improve the performance of sandwich plates under concentrated loads. Inserts are used to distribute concentrated loads in a sandwich plate. Shear stresses are taking place on the interfaces between the insert and the adhesive, as well as on the interface between the adhesive and the core. In the present work an analytical model for calculating these stresses, stress concentrations and maximum load capacity is presented. The model is based on equilibrium equations of the insert and the adhesive in addition to material properties of the mentioned elements. Implementation of the model in a representative example is provided, and the results are commented and discussed.
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Keywords

Inserts; Sandwich Materials; Concentrated Loads; Adhesive; Shear Stress

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