The automotive industry is facing significant challenges for next-generation vehicle design as fuel economy regulations and tailpipe emission standards continue to strive for greater efficiency. In order to ensure vehicle design reaches these sustainability targets, lightweighting through multi-material design and topology optimization (TO) has been suggested as the leading method to reduce weight from conventional component and small assembly structures. More effective tools, techniques, and methodologies are now required to advance the development of multi-phase optimization tools beyond current commercial capability, and help automotive designers achieve critical efficiency improvements without sacrificing performance.Presented here is a unique tool description and practical application of multi-material topology optimization (MMTO), a direct extension of the classical single-material problem statement (SMTO). In this implementation the TO problem is expanded to include material existence and selection design variables in the typical density method while utilizing the solid isotropic material with penalization (SIMP) interpolation scheme. Further improvements from the prior research include adoption of the method of moving asymptotes (MMA) for handling large-scale, high-resolution optimization problems.Emphasized in this paper is a description of a multi-material topology optimization computational tool, an examination of single and multi-material solutions and comments for practical design. First, key equations and techniques that enable MMTO are presented, including interpolation schemes, sensitivity analysis, and filtering methods. Next, MMTO is applied to a practical automotive case study in a minimum compliance framework, and compared to other SMTO approaches. Lastly, an overview of practical design considerations is presented to discuss development of a final product from concept to validation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Multi-Material Topology Optimization: A Practical Approach and Application


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    WCX World Congress Experience ; 2018



    Publication date :

    2018-04-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Multi-Joint Topology Optimization: An Effective Approach for Practical Multi-Material Design Problems

    Hardman, Andrew / Sangha, Balbir / Kim, Il Yong et al. | SAE Technical Papers | 2023


    Multi-Material Topology Optimization: A Practical Method for Efficient Material Selection and Design

    Sangha, Balbir / Li, Daozhong / Vierhout, Garrett et al. | SAE Technical Papers | 2019


    Multi-Material Topology Optimization Considering Crashworthiness

    Hardman, Andrew / Sangha, Balbir / Kim, Il Yong et al. | SAE Technical Papers | 2023


    Multi-Material Topology Optimization Considering Crashworthiness

    Hardman, Andrew / Sirola, Tim / Huang, Yuhao et al. | British Library Conference Proceedings | 2023


    Multi-Material Topology Optimization and Multi-Material Selection in Design

    Sangha, Balbir / Li, Daozhong / Vierhout, Garrett et al. | SAE Technical Papers | 2019