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Effects of Cell Microtopology on the In-plane Dynamic Crushing Analysis of Re-entrant Square Cellular Material

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Abstract

With the development of three-dimensional printing technologies, so-called cellular materials have achieved increasing attention due to outstanding properties. Unlike pure solid structures, properties of cellular materials are influenced by both utilized material and cell microtopology. The present paper proposes a novel type of re-entrant square cellular material. To explore the relationship between microtopology and macrodynamic responses systematically, an explicit dynamic finite element simulation method is used. This work starts by constructing theoretical models of relative density employing a two-dimensional unit cell. Then, the effects of geometric features and configurations on dynamic properties are explored, and simulations indicate that variations of geometric parameters strongly affect properties and that the staggered re-entrant squares are more stable than the regular re-entrant squares. Subsequently, the effects of the impact velocity on dynamic crushing behaviors are elaborated. On this basis, the relationship of unit mass energy absorption and geometric features is obtained by employing the response surface method. Furthermore, with targets of maximum unit mass energy absorption and minimum relative density, the optimal structural parameters are achieved by using non-dominated sorting genetic algorithm. The study provides a detailed introduction to dynamic behaviors of cellular materials and guidance to design new structures with superior characteristics of energy absorption.

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Acknowledgements

This work was supported by the China Scholarship Council (Grant No. 201606170199) and the National Key Research and Development Program of China (2016YFB0101601).

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Authors and Affiliations

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

    Fangwu Ma, Ying Zhao, Hongyu Liang & Jiawei Wang

  2. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109-2102, USA

    Ying Zhao

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  1. Fangwu Ma
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  2. Ying Zhao
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  3. Hongyu Liang
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  4. Jiawei Wang
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Correspondence to Ying Zhao.

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Ma, F., Zhao, Y., Liang, H. et al. Effects of Cell Microtopology on the In-plane Dynamic Crushing Analysis of Re-entrant Square Cellular Material. Automot. Innov. 1, 24–34 (2018). https://doi.org/10.1007/s42154-018-0005-0

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  • DOI: https://doi.org/10.1007/s42154-018-0005-0

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