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Structural Engineering and Mechanics Volume 37, Number 6, March25 2011 , pages 617-632 DOI: https://doi.org/10.12989/sem.2011.37.6.617 |
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FOA (first-order-analysis) model of an expandable lattice structure for vehicle crash energy absorption of an inflatable morphing body |
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Dong Wook Lee, Zheng-Dong Ma and Noboru Kikuchi
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| Abstract | ||
| A concept of crash energy absorbing (CEA) lattice structure for an inflatable morphing vehicle body (Lee et al. 2008) has been investigated as a method of providing rigidity and energy absorption capability during a vehicular collision (Lee et al. 2007). A modified analytical model for the CEA lattice structure design is described in this paper. The modification of the analytic model was made with a stiffness approach for the elastic region and updated plastic limit analysis with a pure plastic bending deformation concept and amended elongation factors for the plastic region. The proposed CEA structure is composed of a morphing lattice structure with movable thin-walled members for morphing purposes, members that will be locked in designated positions either before or during the crash. What will be described here is how to model the CEA structure analytically based on the energy absorbed by the CEA structure. | ||
| Key Words | ||
| lattice structure; crashworthiness; crash energy absorption; inflatable morphing body. | ||
| Address | ||
| Dong Wook Lee: R&D Center, Samsung Techwin, Seongnam-Si, Kyunggi-Do 463-400, Korea Zheng-Dong Ma: Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA Noboru Kikuchi: Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA | ||