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Elastic‐plastic sandwich beams with optimized properties for the impact case
Author(s) -
Schmidt Jürgen,
Winter Werner,
Kuhn Günther
Publication year - 2007
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200700931
Subject(s) - structural engineering , finite element method , materials science , beam (structure) , compressibility , core (optical fiber) , aluminium , optimal design , composite material , computer science , engineering , mechanics , physics , machine learning
An approach for the design of lightweight sandwich beams with optimal performance under low velocity impact loading is presented. Exemplary for beams with stainless steel faces and aluminium foam cores a procedure is proposed that bases on simulation results using an explicit finite element code. Experimental tests assure the accuracy of numerical analyses and provide data to fit the applied plastic compressible material model. By means of a multicriteria optimization method failure mechanisms are identified which dissipate a maximum of energy and lead to minimal deflections as well as to minimal beam thickness and weight at the same time. Face and core thicknesses are used as design variables. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)