RSM and ANN modeling of the energy absorption behavior of steel thin-walled columns: a multi-objective optimization usin
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(2020) 42:563
TECHNICAL PAPER
RSM and ANN modeling of the energy absorption behavior of steel thin‑walled columns: a multi‑objective optimization using the genetic algorithm A. Dadrasi1 · A. R. Albooyeh2 · S. Fooladpanjeh1 · M. Danaei Shad3 · M. Beynaghi3 Received: 31 January 2020 / Accepted: 25 September 2020 © The Brazilian Society of Mechanical Sciences and Engineering 2020
Abstract In many industries, it is necessary to use structures that exhibit a proper stability against the design loads and depreciate the energy in a controlled manner. In this study, the energy absorption characteristics of thin-walled structures with rectangular cross sections are investigated under the quasi-static loading. The section of structures has a different aspect ratio, and in all of them, an elliptical cutout with a different diameter ratio exists on the larger side. In all instances, the area of the cross section and cutout is constant. Hence, an experimental design with two design parameters consisting of the shell aspect ratio and the diameter ratio of the cutout was conducted by applying the central composite design method. Energy absorption parameters were modeled using the artificial neural network and the response surface method. A systematic crashworthiness study was carried out with a multi-objective optimization design using the genetic algorithm. The results showed that the optimal amount of the specific energy absorption was 14.48 kJ/kg and the optimal amount of the peak crushing load was 37.77 kN which was obtained in the aspect ratio of 1 and the diameter ratio of 0.7. The validity of the results was confirmed by empirical experiments. Keywords Crashworthiness · Optimization · Central composite design · Artificial neural network · Response surface method · Genetic algorithm
1 Introduction Nowadays, increasing the safety of structures is an important goal and many researchers investigate in this field. For this purpose, one of the best options is using energy absorbers. So far, structures have been analyzed by different materials like energy absorption that in most of them, two factors decrease in capital and keep occupants alive [1–4]. The behavior of thin-walled structures with different cross sections under the axial loading has been studied for many years. Ha et al. [5] by using a new tubular Technical Editor: Paulo de Tarso Rocha de Mendonça, Ph.D. * A. Dadrasi [email protected] 1
Department of Mechanical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran
2
School of Engineering, Damghan University, Damghan, Iran
3
Adiban Institute of Higher Education, Garmsar, Iran
corrugated configuration mimicked the coconut tree profile. In an attempt to enhance the energy absorption, they minimized the initial peak crushing force and stabilized the crushing process. They used two parameters of the tapered angle and the wavelength, and they reported their results of the energy absorption. Firouzi et al. [6] worked on the energy absorption capability of a type of thin-walled profi
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