Multi-objective optimization of an automotive body component with fiber-reinforced composites

Multi-objective optimization of an automotive body component with fiber-reinforced composites In this study, the design optimization process of a vehicle front body structure made of short-fiber composites is proposed. The aim of the optimization process is to reduce the weight in consideration of quality and production characteristics. Injection molding of short-fiber-reinforced composites leads to anisotropic material properties which depend on the dimensions of the structure, a finding which is taken into account in this research. First, a basic design is derived through topology optimization that assumes linear isotropic material properties. Second, anisotropic properties are derived by an injection molding analysis for each design point and are applied to a structural analysis to consider the anisotropic properties according to the dimensions of the structure. Third, based on the analysis results, a surrogate model is created and multi- objective optimization is conducted. The Pareto region, inversely correlated with the lightweight effect, the quality and the production characteristics, is identified. The optimal solution based on the design goal is derived using the goal-programing method. Keywords Short-fiber composites · Multi-objective design optimization · Front-end module · Topology optimization · Size optimization · Pareto optimum 1 Introduction As the fuel efficiency improvement technology for existing powertrains is limited, reducing the weight of Recently, regulations http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Structural and Multidisciplinary Optimization Springer Journals

Multi-objective optimization of an automotive body component with fiber-reinforced composites

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Engineering; Theoretical and Applied Mechanics; Computational Mathematics and Numerical Analysis; Engineering Design
ISSN
1615-147X
eISSN
1615-1488
D.O.I.
10.1007/s00158-018-2008-1
Publisher site
See Article on Publisher Site

Abstract

In this study, the design optimization process of a vehicle front body structure made of short-fiber composites is proposed. The aim of the optimization process is to reduce the weight in consideration of quality and production characteristics. Injection molding of short-fiber-reinforced composites leads to anisotropic material properties which depend on the dimensions of the structure, a finding which is taken into account in this research. First, a basic design is derived through topology optimization that assumes linear isotropic material properties. Second, anisotropic properties are derived by an injection molding analysis for each design point and are applied to a structural analysis to consider the anisotropic properties according to the dimensions of the structure. Third, based on the analysis results, a surrogate model is created and multi- objective optimization is conducted. The Pareto region, inversely correlated with the lightweight effect, the quality and the production characteristics, is identified. The optimal solution based on the design goal is derived using the goal-programing method. Keywords Short-fiber composites · Multi-objective design optimization · Front-end module · Topology optimization · Size optimization · Pareto optimum 1 Introduction As the fuel efficiency improvement technology for existing powertrains is limited, reducing the weight of Recently, regulations

Journal

Structural and Multidisciplinary OptimizationSpringer Journals

Published: Jun 4, 2018

References

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