Print Email Facebook Twitter Shape, sizing optimization and material selection based on mixed variables and genetic algorithm Title Shape, sizing optimization and material selection based on mixed variables and genetic algorithm Author Tang, X. Bassir, D.H. Zhang, W. Faculty Aerospace Engineering Department Aerospace Structures Date 2010-09-25 Abstract In this work, we explore simultaneous designs of materials selection and structural optimization. As the material selection turns out to be a discrete process that finds the optimal distribution of materials over the design domain, it cannot be performed with common gradient-based optimization methods. In this paper, material selection is considered together with the shape and sizing optimization in a framework of multiobjective optimization of tracking the Pareto curve. The idea of mixed variables is often introduced in the case of mono-objective optimization. However, in the case of multi-objective optimization, we still face some hard key points related to the convexity and the continuity of the Pareto domain, which underline the originality of this work. In addition to the above aspect, there is a lack in the literature concerning the industrial applications that consider the mixed parameters. Continuous variables refer to structural parameters such as thickness, diameter and spring elastic constants while material ID is defined as binary design variable for each material. Both mechanical and thermal loads are considered in this work with the aim of minimizing the maximum stress and structural weight simultaneously. The efficiency of the design procedure is demonstrated through various numerical examples. Subject material selectionshape optimizationmixed design variablesmultiobjective optimizationgenetic algorithms To reference this document use: http://resolver.tudelft.nl/uuid:5a77187a-ce71-4ab5-8b06-3548a8b0aa2a DOI https://doi.org/10.1007/s11081-010-9125-z Publisher Springer ISSN 1389-4420 Source http://www.springerlink.com/content/d213r748v1255666/ Source Optimization and Engineering, 12 (1-2), 2011 Part of collection Institutional Repository Document type journal article Rights (c) 2010 The Author(s). This article is published with open access at Springerlink.com Files PDF tang.pdf 1.08 MB Close viewer /islandora/object/uuid:5a77187a-ce71-4ab5-8b06-3548a8b0aa2a/datastream/OBJ/view