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Optimal shape design of functionally graded thickness inversion tubes subjected to oblique loading

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Abstract

This paper aims to understand and optimize the crush response of Functionally Graded Thickness (FGT) tubes with various thickness distributions subjected to oblique loading using multi-objective optimization method. Hence, finite element (FE) models are established and their results are validated by experimental tests. Two objective functions (specific energy absorption and peak load) are approximated by four different multi-objective optimization models: the weighted average, multi-design optimization (MDO) technique, constrained single-objective optimization, and geometrical average methods. The optimum design results demonstrate that the selection of appropriate inversion tube parameters such as the die radius, the coefficient of friction between the die and tube, and thickness distribution function have significant roles in the crashworthiness design. The results give new ideas to improve the crashworthiness performance of inversion tubes under oblique loading conditions.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Zanjan, Zanjan, Iran

    Omid Mohammadiha & Hashem Ghariblu

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  1. Omid Mohammadiha
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  2. Hashem Ghariblu
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Correspondence to Hashem Ghariblu.

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Mohammadiha, O., Ghariblu, H. Optimal shape design of functionally graded thickness inversion tubes subjected to oblique loading. Struct Multidisc Optim 56, 587–601 (2017). https://doi.org/10.1007/s00158-017-1676-6

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  • DOI: https://doi.org/10.1007/s00158-017-1676-6

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