Static and dynamic crushing of square aluminium extrusions with aluminium foam filler

Hanssen, A.G.; Langseth, Magnus; Hopperstad, Odd Sture

doi:10.1016/s0734-743x(99)00169-4

Cited by 355 publications

(181 citation statements)

References 8 publications

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“…The change of collapse mode from diamond into concertina with foam filling was also observed previously in Al foam-filled Al and steel tubes, polyurethane foamfilled Al tubes and wood sawdust-filled plastic tubes [6,10,[15][16][17] and it was proposed to be due to the thickening effect of foam filling, which drives the deformation shift from diamond to concertina. It was also shown by Hanssen et al [18] that after a critical Al foam density the deformation mode in filled Al tubes shifted from diamond to concertina mode.…”

Section: Filled Aluminum Tubessupporting

confidence: 77%

Quasi-static axial crushing of extruded polystyrene foam-filled thin-walled aluminum tubes: Experimental and numerical analysis

2006

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The experimental and numerical quasi-static crushing responses of extruded closed cell polystyrene foam-filled thin-walled aluminum tubes were investigated. The numerical crash analysis of empty and foam-filled tubes was performed using the explicit finite element code PAM-CRASHe. Satisfactory agreements were generally achieved between the finite element model and experimental deformed shapes, load-displacements, fold lengths and specific energy absorptions. The model and experiments have also highlighted the several effects of foam filling on the crushing of thin-walled tubes. The energy absorptions in foam-filled tubes were further shown to be higher than the sum of the energy absorptions of empty tube (alone) and filler (alone).

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Section: Filled Aluminum Tubessupporting

confidence: 77%

Quasi-static axial crushing of extruded polystyrene foam-filled thin-walled aluminum tubes: Experimental and numerical analysis

2006

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“…Studies on crushing behavior of Al honeycomb and foam filled box columns also showed that the effect of filling on the column crushing load was similar when the strong axis of honeycomb was through and normal to the compression axis, proving that both axial and transverse strength of the filler were effective in increasing the crushing load of filled tube [6]. Hannsen et al [2,4] developed an equation for the average crushing load of foam filled (P af ) columns by including contributions of the average crushing load of empty tube (P ae ), foam plateau stress (r pl ) and interaction effect. The equation was found to be well agreed with experimental results and is given as…”

Section: Introductionmentioning

confidence: 96%

“…It has been shown that when aluminum and steel metal tubes are filled with light weight core materials such as Al closed cell foams, there exists an interaction effect between tube wall and foam filler [1][2][3][4][5][6]. The crushing loads of foam filled tubes are therefore found to be higher than the sum of the crushing loads of foam (alone) and tube (alone) mainly due to this effect.…”

Section: Introductionmentioning

confidence: 99%

Predicting energy absorption in a foam-filled thin-walled aluminum tube based on experimentally determined strengthening coefficient

2006

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The energy absorption in a foam-filled thin-walled circular Al tube was investigated based on the experimentally determined strengthening coefficient of filling using Al and polystyrene closed-cell foams with three different densities. Foam filling was found to change the deformation mode of tube from diamond (empty tube) into concertina, regardless the foam type and density used. Although foam filling resulted in higher energy absorption than the sum of the energy absorptions of the tube alone and foam alone, it was not effective in increasing the specific energy than simply thickening the tube wall. It was shown that for efficient foam filling an appropriate foam-tube combination must be selected by taking into account the magnitude of strengthening coefficient of foam filling and the foam filler plateau load.

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“…Some studies focused on thin-walled columns with innovative cross-sections [5][6][7][8][9][10][11][12][13][14][15]. By contrast, some studies focused on columns made of high strength materials [16][17][18][19], or filled by different materials [20][21][22]. Tang et al [5] proposed a new strategy to increase the energy absorption capacity of thinwalled columns by introducing non-convex corners in cross sections.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on crashworthiness of cold-formed dimpled steel columns

Wang¹,

Nguyen²,

English³

et al. 2017

Thin-Walled Structures

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The UltraSTEEL ® forming process forms plain steel sheets into dimpled steel sheets and this process increases the sheet material's strengths by generating plastic deformation on the material during the process. This paper presented experimental testing and developed a finite element (FE) model to predict the energy absorption characteristics of dimpled thin-walled structures under axial impact loads, and compared the energy absorption efficiencies (specific energy absorption) of plain and dimpled columns. Dynamic experimental tests were conducted using the drop tower at two different impact velocities. Explicit FE analysis were then carried out to simulate the experiments. The FE method was validated by comparing the numerical and experimental failure modes, crushing force response and specific energy absorptions. The validated FE method was then applied in an optimization study on the parameter of forming depth. The effects of forming depth on both geometry and material properties have been taken into account in the optimization study. It has been found that the specific energy absorption of dimpled columns is up to 16.3% higher than the comparable plain columns.

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Static and dynamic crushing of square aluminium extrusions with aluminium foam filler

Cited by 355 publications

References 8 publications

Quasi-static axial crushing of extruded polystyrene foam-filled thin-walled aluminum tubes: Experimental and numerical analysis

Quasi-static axial crushing of extruded polystyrene foam-filled thin-walled aluminum tubes: Experimental and numerical analysis

Predicting energy absorption in a foam-filled thin-walled aluminum tube based on experimentally determined strengthening coefficient

Experimental and numerical study on crashworthiness of cold-formed dimpled steel columns

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