Optimization analysis of novel foam-filled elliptical columns under multiple oblique impact loading

Xiong, Feng; Wang, Dengfeng; Yin, Shengwen

doi:10.1016/j.matdes.2018.06.057

Cited by 34 publications

(15 citation statements)

References 49 publications

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“…Many studies have attempted to further enhance the crashworthiness performance by filling cellular structures into the crash box. Xiong et al 29 adopted the aluminum foam structure as the filler of the crash box to investigate the dynamic response under the oblique impact loading. Results showed that the optimal structure reveals more superior crashworthiness characteristics in comparison with the original design.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of crash box filled with three-dimensional cellular structure under multi-angle impact loading

Liang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Oblique impact loading conditions are common in automobile collision accidents, which strongly influence the energy absorption performance of thin-walled structures. In this paper, a novel three-dimensional (3-D) hexagonal structure-filled crash box with better comprehensive crashworthiness under multiple working conditions is proposed. First, the finite element models of four 3-D typical cellular structures (hexagon structure, re-entrant hexagon structure, star-shape structure, double arrow structure) are established. The dynamic responses of four structures under different impact angles (from 0° to 30°) and impact velocities (from 5 to 15 m/s) are discussed. The results reveal that the 3-D hexagonal structure has great advantages in terms of the energy absorption at varying inclination angles. Second, the 3-D hexagonal structure is filled in the crash box in the form of gradient distribution. The multi-island genetic algorithm (MIGA) based on the response surface model (RSM) is utilized to explore the optimal design of crash box. Compared with the traditional crash box, the optimal 3-D hexagonal structure-filled crash box increases 18.9% in specific energy absorption and decreases 21.7% in maximum peak force, which demonstrates great potential for applications in impact engineering.

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Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of crash box filled with three-dimensional cellular structure under multi-angle impact loading

Liang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…The material, size, and cross-sectional shape of the structure are the important factors affecting the crashworthiness of the structures. 4 The effects of filling materials on the crashworthiness of various foam-filled tubes with different cross-sections are studied, such as circular tubes, 5,6 square tubes, 7–10 single and bi-tubular polygonal tubes, 11 conical tubes, 12–14 multi-cell tubes, 15 corrugated tubes, 16,17 ellipse tubes, 18,19 double-hat tubes, 20 star polygon tubes, 21 and so on. In addition, to reduce the weight while maintaining the mechanical property of the original tube, patterned windows 22–24 and circular discontinuities 25,26 are introduced to the thin-walled structures.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the eﬀect of holes as crush initiators on the crashworthiness performance of bi-tubular aluminum profiles is analyzed. 27 In addition, in the design of thin-walled structures, a series of novel optimization algorithms such as size optimization, 28,29 shape optimization, 30,31 topology optimization, 32,33 multi-objective optimization, 18,19 multi-objective reliability-based design optimization, 34,35 and multi-objective robust-based design optimization 14,36 have been proposed. These methods provide a series of powerful tools to design complex engineering structures to satisfy different design requirements.…”

Section: Introductionmentioning

confidence: 99%

An effective topology optimization method for crashworthiness of thin-walled structures using the equivalent linear static loads

Ren

Min

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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The equivalent static loads method for nonlinear dynamic response structural optimization may be failed in large deformation crash conditions, due to topology optimization with the equivalent static loads mostly beyond the linear range and causing numerical defects such as high compliance of elements. To overcome the above disadvantage, an advanced structural topology optimization method for crashworthiness considering crash-reduced large deformation and plastic buckling is proposed using newly defined equivalent linear static loads. The equivalent linear static loads can adaptively scale to guarantee that the topology optimization is performed within linear range. At each cycle, the crash simulation is performed and the nonlinear nodal displacement vector at the time step with the maximum strain energy is scaled by an adaptive displacement-scaling factor. The equivalent linear static loads that are generated by multiplying the linear stiffness matrix and the scaled nodal displacement vector will be incorporated into topology optimization, which can guarantee the topology optimization to remain in linear range and further solve the numerical instability problems. The process is repeated until the convergence criteria are satisfied. The effectiveness of the proposed method is evaluated by solving a crashworthiness topology optimization of a crash box considering crash-induced plastic buckling to determine the location and profile of crash triggers. The results show that the proposed method can effectively solve the large deformation crashworthiness topology optimization of thin-walled structures and provides a feasible strategy for crash triggers design in crash box.

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“…The crashworthiness of thin-walled structures with diff erent cross-sectional configurations, including square (Sun et al, 2017); circular (Zhang et al, 2018); rectangular (Shena et al, 2017); star-shaped (Deng et al, 2018); elliptical (Ge et al, 2018;Xiong et al, 2018); tapered tubes (Tran, 2017); honeycomb (Palomba et al, 2018;Hu et al, 2019); multi-cell (Xie et al, 2017;Ding et al, 2018); and hybrid square tubes (Zhang et al, 2019), have been researched in detail. From these studies, it was well known that the most severe plastic deformation occurs near sectional corners of tubes, which could dissipate a great amount of energy due to membrane and bending deformation along the bending hinge lines (Hu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…To enhance the energy absorption capability and reduce the initial peak crushing force of thinwalled tubes, the attention of many researchers has also been drawn to corrugated tubes (Mahbod & Asgari, 2018), functionally graded thickness (FGT) tubes (Sun et al, 2017), foamfilled tubes (Xiong et al, 2018;Googarchin et al, 2019) and metal/composite hybrid tubes (Zhang et al, 2019). For instance, Mahbod and Asgari (2018) conducted a theoretical study to investigate the behavior of corrugated composite tubes under axial and oblique crushing.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Prediction of Dynamic Axial Crushing on a Square Tube with Eight Holes Used as a Crush Initiator

Malawat

Sumarsono²,

Istiyanto³

et al. 2019

IJTech

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Thin-walled square steel tubes are part of automobile structures, used as impact energy absorbers on crush boxes. Under axial crushing, such tubes sometimes produces unpredictable folding forms. There are three modes of dynamic axial crushing folding forms: the symmetric collapse mode; the asymmetric mixed collapse mode A; and the asymmetric mixed collapse mode B. The objective of this paper is to develop a theoretical prediction for the three modes on a thin-walled square steel tube with eight holes used as crush initiator. The basic folding mechanism is used to predict the dynamic axial crushing analysis on the tube. These theoretical analyses can also can be implemented in different crush initiator positions. Two types of cross section (c/h) were used in this study: specimen A (c/h = 60.42) and specimen B (c/h = 45.69). Thirty-six experimental drop test studies were conducted on the thin wall square tube. In addition, the results of a previous drop test were compared to the results of the theoretical prediction. The results show that the theoretical analysis has good agreement with the experimental drop test study. This study proposes nine formulas to predict average force, peak force and energy absorption of the dynamic axial crushing on the thin-walled square steel tube with eight holes of crush initiator. The limitation of these formulas, however, is that they are unable to show the relationship between force and time in a graph.

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Optimization analysis of novel foam-filled elliptical columns under multiple oblique impact loading

Cited by 34 publications

References 49 publications

Multi-objective optimization of crash box filled with three-dimensional cellular structure under multi-angle impact loading

Multi-objective optimization of crash box filled with three-dimensional cellular structure under multi-angle impact loading

An effective topology optimization method for crashworthiness of thin-walled structures using the equivalent linear static loads

Theoretical Prediction of Dynamic Axial Crushing on a Square Tube with Eight Holes Used as a Crush Initiator

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