Multi-objective optimization of a novel crash box with a three-dimensional negative Poisson’s ratio inner core

Wang, Chunyan; Zou, Songchun; Zhao, Wanzhong

doi:10.1177/0954407017741780

Cited by 14 publications

(8 citation statements)

References 21 publications

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“…45 Considering the demand of automobile lightweight, the HS inner core is made of Aluminum alloy with Young's modulus E s = 71 GPa, mass density r = 2810 kg/m 3 , yield stress s y = 325 MPa and Poisson's ratio m = 0.33. 38 As shown in Table 5, it can be found that the energy absorption box filled with HS structure has obvious advantages and the SEA u and s E of three cellular structure with NPR are basically the same. Consistent with the above analysis (section 3), the PCF of the crash box filled with HS structure is the largest, which needs to be further improved by gradient design.…”

Section: Optimization Definitionmentioning

confidence: 91%

“…30 In recent years, some micro-topology structure with negative Poisson's ratio (NPR) has attracted many interests because of the excellent mechanical properties compared with hexagonal structure (HS), such as re-entrant structure (RS), [31][32][33] double arrowhead structure (DAS), [34][35][36] and starshaped structure (SSS). 37 Wang et al 38,39 proposed a novel crash box filled with a three dimensional NPR inner core based on RS and introduced the structural bionics to the structural design to investigate the crashworthiness performance of crash box under the axial impact. The simulation results showed that the 3-D NPR crash box could generate smooth deformation and further improve the energy absorption performance compared with the initial design and the 2-D NPR crash box.…”

Section: Introductionmentioning

confidence: 99%

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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: Optimization Definitionmentioning

confidence: 91%

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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“…Undulation of load carrying-capacity (ULC) was introduced by Wang et al 21 evaluate the stability of the structure under crushing. Lower ULCs indicate that the fluctuations of the load–displacement curve are close to each other which indicate a more stable structure under crushing.…”

Section: Problem Formulations and Definitionsmentioning

confidence: 99%

“…They suggested detailed shapes of three new types of crash box based on their proposed design procedure. Wang et al 21 proposed a crash box filled with a three dimensional negative Poisson’s ratio (NPR) inner core based on an inner hexagonal cellular structure. And resulted the NPR structure can generate smooth and controllable deformation to absorb energy as car crash box.…”

Section: Introductionmentioning

confidence: 99%

A basic design for automotive crash boxes using an efficient corrugated conical tube

Moghaddam¹,

Kheradpisheh

Asgari

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Frontal vehicle structure is of high importance through crash energy managements and crash boxes are the fundamental structural component for vehicle safety as well as after sales issues. Similar to many other vehicle components, the detail design of crash box is usually part of manufacture knowhow. However, some guide lines are always available. In this article a general procedure is introduced for designing of crash box with the aid of novel thin walled structures and according to conventional crash scenarios. The problem is followed through some basic steps. Firstly, the crash box idea is selected through a wide range of previous investigated elements and is packaged in a real bench vehicle. Then thanks to the protection provided by the new crash box on the other more expensive components (e.g. headlamp, cooling pack, etc.), the effectiveness of this element are acknowledged through the low speed offset crash. Further on the robustness of new proposed crash box is approved by high speed crash simulations. The quasi-static simulations implemented during the analyses are carried out by finite element explicit code (Abaqus) and the FE modeling and dynamic simulation through the next steps are also performed in ANSA and PAM CRASH respectively. Finally in addition to the general crash box design proposed procedure, the achieved results demonstrated that the corrugated conical thin walled tubes deforms in regular and rather stable shape under both axial and oblique loadings. They also produced a reasonable reaction force versus deformations which leads to stiff and crashworthy energy absorber in comparison to traditional rectangular and even some special models like as origami shapes, and so they could be a valuable selection for crash box implementations in passenger cars.

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“…Guan et al 8 designed an NPR bumper system, which can absorb more collision energy than traditional bumper system and foam aluminum filled bumper system. Wang et al 9 designed a novel crash box with a 3D NPR inner core and applied multiobjective optimization, significantly improved the performance of energy absorbing box. Zou et al 10 designed an NPR-filled B-pillar and reduced the intrusion displacement and intrusion velocity in side collision effectively.…”

Section: Introductionmentioning

confidence: 99%

Reliability optimization of a large-size tubular negative Poisson’s ratio battery protection structure

Dai

Wang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The battery pack placed on the chassis of an electric vehicle is easily to be damaged in a side collision because of its large volume. Therefore, the power battery pack should comprise a protective structure that can cover the entire side. Because the traditional hollow structure has limited performance, this paper proposes a large-size tubular negative Poisson's ratio (LTNPR) protection structure. A 2D LTNPR structure that can protect the side of battery pack entirely is designed and its mechanical properties are calculated. Then, the FE model of the battery pack equipped with LTNPR structure is analyzed under side pole impact by CAE simulation, which verifies the superiority of the LTNPR structure over the traditional hollow structure. Finally, deterministic optimization and reliability optimization are applied. The study and results demonstrate that compared with traditional structure, the LTNPR structure can improve the crashworthiness of the power battery pack significantly. Furthermore, the specific energy absorption (SEA) of LTNPR structure is increased by 28.81% and the maximum acceleration of battery pack is reduced by 15.29% through deterministic optimization, while the σ level is increased from 2.8448 to 8 through reliability optimization. The passive safety of electric vehicle is improved.

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Multi-objective optimization of a novel crash box with a three-dimensional negative Poisson’s ratio inner core

Cited by 14 publications

References 21 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

A basic design for automotive crash boxes using an efficient corrugated conical tube

Reliability optimization of a large-size tubular negative Poisson’s ratio battery protection structure

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