Dynamic Crushing Analysis of a Three-Dimensional Re-Entrant Auxetic Cellular Structure
1
Department of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
*
Author to whom correspondence should be addressed.
Materials 2019, 12(3), 460; https://doi.org/10.3390/ma12030460
Received: 9 January 2019
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Revised: 28 January 2019
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Accepted: 30 January 2019
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Published: 1 February 2019
(This article belongs to the Section Advanced Composites)
Dynamic behaviors of the three-dimensional re-entrant auxetic cellular structure have been investigated by performing beam-based crushing simulation. Detailed deformation process subjected to various crushing velocities has been described, where three specific crushing modes have been identified with respect to the crushing velocity and the relative density. The crushing strength of the 3D re-entrant auxetic structure reveals to increase with increasing crushing velocity and relative density. Moreover, an analytical formula of dynamic plateau stress has been deduced, which has been validated to present theoretical predictions agreeing well with simulation results. By establishing an analytical model, the role of relative density on the energy absorption capacity of the 3D re-entrant auxetic structure has been further studied. The results indicate that the specific plastic energy dissipation is increased by increasing the relative density, while the normalized plastic energy dissipation has an opposite sensitivity to the relative density when the crushing velocity exceeds the critical transition velocity. The study in this work can provide insights into the dynamic property of the 3D re-entrant auxetic structure and provides an extensive reference for the crushing resistance design of the auxetic structure.
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Keywords:
3D auxetic structure; crushing mode; dynamic plateau stress; energy absorption; finite element simulation
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MDPI and ACS Style
Wang, T.; Li, Z.; Wang, L.; Ma, Z.; Hulbert, G.M. Dynamic Crushing Analysis of a Three-Dimensional Re-Entrant Auxetic Cellular Structure. Materials 2019, 12, 460. https://doi.org/10.3390/ma12030460
AMA Style
Wang T, Li Z, Wang L, Ma Z, Hulbert GM. Dynamic Crushing Analysis of a Three-Dimensional Re-Entrant Auxetic Cellular Structure. Materials. 2019; 12(3):460. https://doi.org/10.3390/ma12030460
Chicago/Turabian StyleWang, Tao, Zhen Li, Liangmo Wang, Zhengdong Ma, and Gregory M. Hulbert. 2019. "Dynamic Crushing Analysis of a Three-Dimensional Re-Entrant Auxetic Cellular Structure" Materials 12, no. 3: 460. https://doi.org/10.3390/ma12030460
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