Fracture properties of aluminum foam crash box

Han, Moon Sik; Min, Byoung-Sang; Cho, Jae Ung

doi:10.1007/s12239-014-0099-2

Cited by 21 publications

(7 citation statements)

References 12 publications

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“…Fig. 5 shows the load-displacement result of compression test for cases 3 with aluminum foam, where the maximum load was shown to be around 35000N [13]. By comparing with experimental and analysis result, the analysis data can be verified since the analysis result can be seen to approach the experimental result.…”

Section: Study Model and Methodsmentioning

confidence: 82%

Impact Characteristic According to the Structure of Crash Box at the Vehicle

Min

Cho

2017

Archives of Metallurgy and Materials

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The crash box between a bumper and a car body in automobiles can reduce impacts for car bodies with a bumper at a low-speed collision by preventing the shocks. Also, this crash box is the part playing a very important role for the safety of vehicle and the reduction of repair cost, and many studies have been investigated for the performance. In this study, aluminum foam was inserted in an aluminum crash box to analyze the relationships of deformation, stress and internal energy. The compression characteristics are compared with six cases. In addition, the load due to displacement at experiment for a case is verified by modeling with finite elements and performing the structural analysis. As these study results for investigating characteristics of the crash box, it is thought that the effective designs of crash box to enhance the durability for collision are made possible.

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Section: Study Model and Methodsmentioning

confidence: 82%

Impact Characteristic According to the Structure of Crash Box at the Vehicle

Min

Cho

2017

Archives of Metallurgy and Materials

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“…where h r and h p are the tangent moduli in uniaxial and hydrostatic compression, respectively, andr is the equivalent stress equal to the first term in Eq. (5). The assumptions of this model and the sources for the material data are discussed in detail in Refs.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Potential applications for sandwich panels with metal foam core range from various car components [3][4][5] to solar power plants [6] and train/ship structures [7,8]. Perhaps, the greatest potential for application exists in the aerospace industry.…”

Section: Introductionmentioning

confidence: 99%

Laser Forming of Sandwich Panels With Metal Foam Cores

Bucher

Cardenas

Verma³

et al. 2018

Journal of Manufacturing Science and Engineering

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Over the past decade, laser forming has been effectively used to bend various metal foams, opening the possibility of applying these unique materials in new engineering applications. The purpose of the study was to extend laser forming to bend sandwich panels consisting of metallic facesheets joined to a metal foam core. Metal foam sandwich panels combine the excellent shock-absorption properties and low weight of metal foam with the wear resistance and strength of metallic facesheets, making them desirable for many applications in fields such as aerospace, the automotive industry, and solar power plants. To better understand the bending behavior of metal foam sandwich panels, as well as the impact of laser forming on the material properties, the fundamental mechanisms that govern bending deformation during laser forming were analyzed. It was found that the well-established bending mechanisms that separately govern solid metal and metal foam laser forming still apply to sandwich panel laser forming. However, two mechanisms operate in tandem, and a separate mechanism is responsible for the deformation of the solid facesheet and the foam core. From the bending mechanism analysis, it was concluded on the maximum achievable bending angle and the overall efficiency of the laser forming process at different process conditions. Throughout the analysis, experimental results were complemented by numerical simulations that were obtained using two finite element models that followed different geometrical approaches.

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“…With the development of automobile lightweight, more attention has been focused on safety problems related to this. When a car is involved in a frontal collision in a traffic accident, the bumper system, consisting of the bumper beam, energy absorbing box and front rail, absorbs about 50% of the total kinetic energy [1,2]. The energy absorbing box is an important component that connects the bumper beam to the front rail, and absorbs energy through its deformation, accounting for about 15% of the total absorbed energy [1,2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging Time on Crushing Performance of Al-0.5Mg-0.4Si Alloy for Safety Components of Automobile

Jiang²,

et al. 2021

Metals

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The effect of aging time on the crushing performance of Al-0.5Mg-0.4Si alloy used for safety components of automobile was investigated by tensile test and crush test. Moreover, the microstructure of the alloy was investigated by transmission electron microscopy (TEM). The results show that the localized deformation ductility index, ΔAabs, which is defined as the difference between total elongation and uniform elongation, of Al-0.5Mg-0.4Si alloy is 6.5%, 7.0% and 8.5%, respectively, after being aged at 210 °C for 1, 3 and 6 h, and this tendency is the same as that of the crushing performance. The spacing of grain boundary precipitates (GBPs) from TEM results are found to be 94.9, 193.6 and 408.2 nm after being aged at 210 °C for 1, 3 and 6 h, respectively, and this tendency is same to that of ΔAabs. A mechanism about the relation between the spacing of GBPs and the ductility index ΔAabs has been proposed based on localized deformation around GBPs. With the increase of GBPs spacing, the ΔAabs increases, and the crushing performance is improved.

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Fracture properties of aluminum foam crash box

Cited by 21 publications

References 12 publications

Impact Characteristic According to the Structure of Crash Box at the Vehicle

Impact Characteristic According to the Structure of Crash Box at the Vehicle

Laser Forming of Sandwich Panels With Metal Foam Cores

Effect of Aging Time on Crushing Performance of Al-0.5Mg-0.4Si Alloy for Safety Components of Automobile

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