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Cross-sectional shape design and optimization of automotive body with stamping constraints

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Abstract

At conceptual design stage, automotive body is usually simplified as a frame structure, which consists of thinwalled beams (TWBs). Therefore, the most important issue is to determine the cross-sectional shape of TWBs under the requirement of mechanical properties. However, design engineers mostly depend on their experience or repeated modification to design the cross-sectional shape of TWBs. So this paper presents a rapidly cross-sectional shape design and optimization method to satisfy the demand of mechanical properties and meanwhile minimize the weight of TWB. Firstly, cross-sectional mechanics property formulations are summarized. Especially, the torsional rigidity formulation of three-cell cross section is derived for the first time in this paper. Secondly, the shape optimization model is created to minimize the weight of TWB and improve the mechanical properties, which is solved by genetic algorithm. Moreover, three stamping constraints, draft angle, chamfer radius and assembly, are introduced to promote the cross-sectional shape more practice. Lastly, numerical examples verify the effectiveness of the optimization model and show the application in structural modification of automotive frame.

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Authors and Affiliations

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130025, China

    W. J. Zuo

  2. Key Laboratory of Advanced Manufacture Technology for Automobile Parts (Chongqing University of Technology), Ministry of Education, Chongqing, 400054, China

    W. J. Zuo

  3. School of Mechanical Science & Engineering, Jilin University, Changchun, 130025, China

    J. T. Bai

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  1. W. J. Zuo
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  2. J. T. Bai
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Correspondence to W. J. Zuo.

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Zuo, W.J., Bai, J.T. Cross-sectional shape design and optimization of automotive body with stamping constraints. Int.J Automot. Technol. 17, 1003–1011 (2016). https://doi.org/10.1007/s12239-016-0098-6

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  • DOI: https://doi.org/10.1007/s12239-016-0098-6

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