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A. Razgordanisharahi:
"Hybrid Model for Static Deformations of Sandwich Beams and its Numerical Validation";
Supervisor: Y. Vetyukov; Institut für Mechanik und Mechatronik, 2021; final examination: 2021-06.

Sandwich structures exhibit attractive properties such as high durability and fantastic design capabilities. Owing to their superior mechanical and design capabilities, they are one of the major advancing steps towards intelligent materials. In this study, we aim to investigate the effects of core thickness and stiffness on the static response of a sandwich beam under distributed loading. For this purpose, four methods of analyses are utilized in this thesis. Three of these approaches are numerical methods, namely FEM modeling with cubic interpolation functions, Ritz method and 2D simulation in ABAQUS software. In addition to numerical schemes, an equivalent single layer beam model is considered in order to validate the results of proposed compound beam model. One of the main goals of this study is to evaluate the capacity of the proposed compound method to model the sandwich beam as a combination of two Bernoulli-Euler beams for the face sheets as well as a continuum model of the core in order to find accurate total strain energy of sandwich beams for various material properties of the layers. The most important findings of the current study are related to capturing the behavior of the cross-sections during the deformation in various material parameter ranges. The results of the proposed method stand in a good agreement with the ABAQUS simulations as a reference solution.

sandwich beams; Ritz method; finite element method

http://dx.doi.org/10.34726/hss.2021.83282