Optimization of H-shaped thin-walled energy absorber by Taguchi method and a new theoretical estimation for its energy absorption

Firouzi, Mojtaba; Niknejad, Abbas; Ziaee, Sima; Hematiyan, M. R.

doi:10.1016/j.tws.2018.06.027

Cited by 16 publications

(8 citation statements)

References 35 publications

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“…85 As well as percent of contribution (P) of each parameter can be defined. In order to accomplish ANOVA analysis, DOF, sum of square (SS), mean of square (MS), F-ratio and contribution (%) calculated based on the following formulas [86][87][88][89] SS f ¼…”

Section: Anovamentioning

confidence: 99%

Quasi-static axial crushing performance of thin-walled tubes with circular hole discontinuities

Alshahrani

Sebaey

Allah

et al. 2022

Journal of Composite Materials

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This paper investigates the crashworthiness performance of square pipes with induced holes. Glass reinforced epoxy (GFRP) specimens were fabricated and tested under quasi-static axial crashing. Four design parameters were chosen, each at three levels, to calculate crashworthiness indicators. The design parameters are the hole diameter (d), the hole position to specimen length ratio (P/L), the number of holes and distribution (n), and crosshead speed (V). Taguchi technique has been adapted to get the optimum crashworthiness parameters. Experiments based on Taguchi’s orthogonal array with 9 experimental runs (L9) were performed. Optimal conditions with the maximum absorbed energy (U) and minimum initial peak force ([Formula: see text]) were determined. The main effects, signal to noise ratio (S/N), and analysis of variance (ANOVA) have been investigated. Results indicated that “V” followed by “d” are the highest influencing parameters on the values of “U” with a contribution of 49% and 43%, respectively. The dominant influencing parameter on the values of [Formula: see text] is “n” with a contribution of 94%. Finally, confirmation tests were carried out to validate the estimated model with respect to experimental results. The optimum U and [Formula: see text] of GFRP square pipes with circular cutouts were compared with those of non-porous specimens.

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Section: Anovamentioning

confidence: 99%

Quasi-static axial crushing performance of thin-walled tubes with circular hole discontinuities

Alshahrani

Sebaey

Allah

et al. 2022

Journal of Composite Materials

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“…The absorbers with different cross-sections were studied by several researchers and the comparison was provided in literature. 19 , 20 The multi-cell absorbers with triangular cross-sectional under lateral loading were considered by Teran. 21 In this paper, a four-cell square cross-section structure with varying thicknesses sides is subjected to quasi-static lateral loading (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Energy absorption parameters of multi-cell thin-walled structure with various thicknesses under lateral loading

Kazemi

Serpoush

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Energy absorbers are widely used in many engineering structures, especially mobile ones to prevent or alleviate the impact damages. Thin-walled structures are employed as an important category of energy-absorbing systems. In this study, the effect of thickness variations in different parts of a particular structure is investigated on the energy absorption behavior. The geometry of the considered structure is a four-cell squared-section of aluminum alloy 6061 that is subjected to the lateral loading and the thicknesses of the sides are defined as the input variables. For the systematic investigation of the input variables effect, design of experiments procedure is utilized. The simulations are performed by the LS-Dyna software using the finite element method based on the output data of design of experiments. Moreover, in order to ensure the accuracy and validity of the simulations, an experimental investigation has been conducted for one of the scenarios and the results are confirmed. According to the results of numerical investigations, it was found that all the input variables of the problem are effective with distinct and considerable trend in energy absorption of the structures. These trends are generally nonlinear and relative extremum can be observed in some of them. Finally, by analyzing the energy absorption process of the structures by response surface methodology, an optimal sample is selected and simulated; moreover, the identical sample is also subjected to experimental tests. The results showed approximately 272% enhancement in the specific energy absorption of the optimal sample in design of experiments table compared to the weakest one.

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“…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 profiles with H-shaped cross sections during the quasi-static flattening process. They used two different material models of rigid-linear work hardening and power hardening.…”

Section: Introductionmentioning

confidence: 99%

RSM and ANN modeling of the energy absorption behavior of steel thin-walled columns: a multi-objective optimization using the genetic algorithm

Dadrasi

Albooyeh

Fooladpanjeh

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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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.

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Optimization of H-shaped thin-walled energy absorber by Taguchi method and a new theoretical estimation for its energy absorption

Cited by 16 publications

References 35 publications

Quasi-static axial crushing performance of thin-walled tubes with circular hole discontinuities

Quasi-static axial crushing performance of thin-walled tubes with circular hole discontinuities

Energy absorption parameters of multi-cell thin-walled structure with various thicknesses under lateral loading

RSM and ANN modeling of the energy absorption behavior of steel thin-walled columns: a multi-objective optimization using the genetic algorithm

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