Journal
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
Volume 12, Issue 4, Pages 563-576Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10999-016-9341-6
Keywords
Bionic thin-walled structure; Finite element method; Crashworthiness; Ensemble metamodel; Multi-objective optimization
Funding
- National Science Foundation for Young Scientists of China [11302075]
- National Science Fund for Distinguished Young Scholars of China [11225212]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120161120009, 20120161130001]
- Natural Science Foundation of Hunan Province of China [14JJ3061]
- Young Teacher Development Plan of Hunan University of China
- Joint Center for Intelligent New Energy Vehicle
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Bio-inspired engineering design has drawn increased attention in recent years for the excellent structural and mechanical properties of the biological systems. In this study, the horsetail-bionic thin-walled structures (HBTSs) were investigated for their crashworthiness under axial dynamic loading. Six HBTSs with different cross section configurations (i.e., number of cells) were evaluated using nonlinear finite element (FE) simulations. To obtain the optimal design of the HBTSs, an ensemble metamodel-based multi-objective optimization method was employed to maximize the specific energy absorption while minimizing maximum impact force of the HBTSs. Using the ensemble metamodeling, FE simulations and the NSGA-II algorithm, the Pareto optimum designs of all six HBTSs were obtained and the HBTS with 16 cells were found to have the best crashworthiness. An optimum design of the HBTS with 16 cells was verified using FE simulation and found to have good agreement with simulation results.
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