Journal
THIN-WALLED STRUCTURES
Volume 108, Issue -, Pages 205-214Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2016.08.021
Keywords
Multi-corner; Sandwich structure; Crashworthiness; Optimization; Interaction effect
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Funding
- National Natural Science Foundation of Guangdong, China [2014A030313251]
- National Natural Science Foundation of China [50975067, 51375169]
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A multi-wall structure by sandwiching star-shaped tube between two circulars is proposed and named it CSC-tube in this paper. It is found that the interaction effects between tubes walls play an important role in the improvement of the crashworthiness. The experimental result shows that the mean crushing force of the new design is 25% higher than that of star-shaped tube. The Surrogate model based on radial basis function is employed for the multi-objective optimization problem to maximize the value of the specific energy absorption and minimize the peak value of the crushing force with the design variables inner, outer and core thickness. The models are optimized by Non-Dominated Sorting Genetic Algorithm-II (NSGA-11) and the compromise solution shows that 8.03% increase in specific energy absorption and 12.73% decrease in the value of peak crushing force can be achieved. (C) 2016 Elsevier Ltd. All rights reserved.
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