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Studies on Impact Performance of Gradient Lattice Structure Applied to Crash Box
Technical Paper
2018-01-0119
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
The conventional crash box with thin-walled column conceals some limitations on pedestrian protection and lightweight. The metallic NPR metamaterials designed in this study are based on re-entrant lattice structures. Re-entrant structures are known to be one main class of axenic structures that display negative Poisson’s ratio (NPR), which can be manufactured by 3D printing technology. This kind of metamaterial has good designability and can be used as the filling structure of the crash box to improve the crashworthiness of the car. This paper starts from the relations between geometric parameters of the metamaterial. Considering the deformation characteristics of the crash box, the structure were designed into some gradient types. The mechanical properties of different gradient structures under the same impact conditions were compared to find the proper gradient structures. Based on the studies, the gradient lattice structure is applied to the automobile crash box. We made some simulation by the finite element software LS-DYNA of vehicle head-on collision. We compared the crashworthiness of the cars which have different crash boxes. The accelerations of some key points in the crew compartment were measured. Also, we compared the energy absorption efficiency of the boxes. We came to the conclusion that the gradient lattice structure can efficiently improve the structural crashworthiness criteria of the thin-walled column and also achieve better pedestrian protection of the vehicle structure. Because the lattice structure has good impact performance, some other vehicle structures which need to have a good impact behavior can also be replaced by it .
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Wu, X., Zhang, S., and Shao, J., "Studies on Impact Performance of Gradient Lattice Structure Applied to Crash Box," SAE Technical Paper 2018-01-0119, 2018, https://doi.org/10.4271/2018-01-0119.Data Sets - Support Documents
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References
- Dong , Z. A Simulation Study of the Crashworthiness of Automobile Crash Box Based on Stamping[D] Harbin Harbin Engineering University 2013
- Hua , Z. Study on Finite-Element Simulation of Crash-Box’s Spot Welds and Optimization of Their Location[D] Harbin Harbin Engineering University 2011
- Lin , M. , Xiankun , W. , Xinming , W. , and Ming , X. A Research on the Impact Energy-Absorbing Capacity of the Aluminum Alloy Energy-Absorbing Box of the Bumper[J] Journal of Chongqing University of Technology (Natural Science) 26 06 1 7 2012
- Jiga , G. Material and Shape Crash-Box Influence on the Evaluation of the Impact Energy Absorption Capacity during a Vehicle Collision Materials 28 1 67 72 January-June 2016
- Toksoy , A.K. and Guden , M. Partial Al Foam Filling of Commercial 1050H14 Al Crash Boxes: The Effect of Box Column Thickness and Foam Relative Density on Energy Absorption[J] Thin-Walled Structures 48 482 494 2010
- Wang , W. , Zijun , A. , Chunyan , P. , and Huagui , H. Simulation Research on the Energy Absorption Characteristics of Aluminum Foam-Filled Steel/Al Clad Tube under Axial Impact Loading[J/OL] Journal of Harbin Engineering University 38 07 1093 1099 2017
- Evans , A.G. , Hutchinson , J.W. , and Ashby , M.F. Multifunctionality of Cellular Metal Systems Progress in Materials Science 43 171 221 1999
- Ashby , M.F. and Medalist , R.M. The Mechanical Properties of Cellular Solids Metallurgical Transactions A 14 9 1755 1769 1983
- White , M.D. and Jones , N. Experimental Quasi-Static Axial Crushing of Top-Hat and Double-Hat Thin-Walled Sections International Journal of Mechanical Sciences 41 179 208 1999
- Sun , G. , Xu , F. , Li , G. , and Li , Q. Crashing Analysis and Multiobjective Optimization for Thin-Walled Structures with Functionally Graded Thickness [J] International Journal of Impact Engineering 64 62 74 2014
- Zarei , H.R. and Kroger , M. Crashworthiness Optimization of Empty and Filled Aluminum Crash Boxes International Journal of Crashworthiness 12 255 264 2007
- Almgren , R.F. An Isotropic Three-Dimensional Structure with Poisson’s Ratio=-1 [J] Journal of Elasticity 15 4 427 430 1985
- Gibson , L.J. and Ashby , M.F. Cellular Solids - Structure and Properties 2nd Cambridge Cambridge University Press 1997 87 148
- Larsen , U.D. , Sigmund , O. , and Bouwstra , S. 1996
- Yang , L. , Harrysson , O. , West , H. , and Cormier , D. Mechanical Properties of 3D Re-Entrant Honeycomb Auxetic Structures Realized via Additive Manufacturing International Journal of Solids and Structures 69-70 475 490 2015
- Wang , Y. , Wang , L. , Ma , Z.-d. , and Wang , T. Parametric Analysis of a Cylindrical Negative Poisson’s Ratio Structure Smart Materials and Structures 25 3 035038 2016
- Stefan , H. and Andrés Díaz , L. Direct Laser Writing of Auxetic Structures: Present Capabilities and Challenges Smart Materials and Structures 23 8 085033 2014
- Ren , X. Studies on Three-Dimensional Metamaterials and Tubular Structures with Negative Poisson’s Ratio [D] Melbourne RMIT University 2017
- Bertoldi , K. , Reis , P.M. , Willshaw , S. , and Mullin , T. Negative Poisson’s Ratio Behavior Induced by an Elastic Instability [J] Advanced Materials 22 3 361 366 2010
- Johnson , G.R. , and Cook , W.H. A Constitutive Model and Data for Metals Subjected to Large Strains, High Strain Rates and High Temperatures[C] Proceedings of the 7th International Symposium on Ballistics Hague, Netherlands 1983 541 547
- Koizumi , M. FGM Activities in Japan Composites Part B: Engineering [J] 28 1-2 1 4 1997