A Study on Bending Behaviours of Aluminium Foam-Filled Tubes

2014 ◽  
Vol 620 ◽  
pp. 413-416 ◽  
Author(s):  
Yang An ◽  
Chun Hui Yang ◽  
Peter Hodgson
Keyword(s):  
Failure Modes ◽  
Aluminium Foam ◽  
Strengthening Effect ◽  
The Finite Element Method ◽  
Bending Tests ◽  
Bending Load ◽  
Foam Filled ◽  
Thin Walled ◽  
Energy Absorbing ◽  
Insight Into

In the study, the strengthening effect of aluminium foam in thin-walled aluminium tubes subject to bending load in investigated experimentally and numerically. Bending tests are conducted on foam filler, hollow tube and foam-filled tube. The finite element method is used as well to get deeper insight into the crush failure modes via focusing on the influence from wall thickness of the tube. The obtained information is useful to optimally design foam-filled tubes as energy absorbing devices in automotive engineering. The optimisation results can be implemented to find an optimum foam-filled tube that absorbs the same energy as the optimal hollow tube but with much less weight.

Dynamic behaviour of cork and cork-filled aluminium tubes: Numerical simulation and innovative applications

Holzforschung ◽  
2007 ◽  
Vol 61 (4) ◽  
pp. 400-405 ◽  
Author(s):  
Celina Pires Gameiro ◽  
José Cirne ◽  
Victor Miranda ◽  
Joaquim Pinho-da-Cruz ◽  
Filipe Teixeira-Dias
Keyword(s):  
Energy Absorption ◽  
Numerical Study ◽  
Industrial Applications ◽  
Aluminium Foam ◽  
The Finite Element Method ◽  
Absorbing Medium ◽  
Crash Protection ◽  
Foam Filled ◽  
Energy Absorbing ◽  
Deformation Modes

Abstract Cork is a unique and complex natural cellular material with many industrial applications. The purpose of this paper is to explore a new application field for the use of micro-agglomerate cork as an energy-absorbing medium. A numerical study on the energy absorption capabilities of square and circular cork-filled aluminium tubes with a width or diameter of 80 mm, length of 300 mm and variable thickness was performed with the finite element method code LS-DYNA™. The tubes were impacted uniaxially at 10 and 15 m s-1. The same analysis was carried out on aluminium foam-filled tubes. The results demonstrate that cork filling leads to a considerable increase in the energy absorbed for both section geometries, and that tube thickness plays an important role in the deformation modes and energy absorption. The investigation revealed better results for aluminium foam-filled structures, but demonstrated that micro-agglomerate cork has high potential as an energy-absorbing medium in crash protection applications.

Numerical Simulation on Bending Characteristics of Aluminium Foam Filled Thin-Walled Tubes

2011 ◽  
Vol 213 ◽  
pp. 88-92 ◽  
Author(s):  
Qing Chun Wang ◽  
Hao Long Niu ◽  
Guo Quan Wang ◽  
Yu Xin Wang
Keyword(s):  
Energy Absorption ◽  
Absorption Capacity ◽  
Aluminium Foam ◽  
Bending Energy ◽  
Energy Absorption Capacity ◽  
Thin Walled Structures ◽  
Foam Filling ◽  
Foam Filled ◽  
Thin Walled ◽  
Energy Absorbing

Different aluminum foam filling lengths were used to increase the bending energy absorbing capacity of the popularly used hat sections. Bending energy-absorption performance of the thin-walled tubes was numerically studied by explicit non-linear software LS-Dyna. First empty hat section subjected to quasi-static bending crushing was simulated, then structures with different aluminium foam filling lengths were calculated, finally energy absorption capacity of these structures were compared. Calculation results showed that, the internal energy absorbed and mass specific energy absorption capacity of foam filled thin walled structures were increased significantly compared to the empty sections. The reason of the improvement was mainly due to the contact of the aluminium foam and the structure. Aluminium foam filling is a promising method for improving lateral energy absorbing capacity of thin-walled sections.

scholarly journals Energy Absorption Characteristics of Foam Filled Tri Circular Tube under Bending Loads

2021 ◽  
Vol 15 ◽  
pp. 159-164
Author(s):  
Fauzan Djamaluddin
Keyword(s):  
Energy Absorption ◽  
Failure Modes ◽  
Circular Tube ◽  
Comparative Investigation ◽  
Tubular Structures ◽  
Vehicle Engineering ◽  
Bending Resistance ◽  
Bending Loads ◽  
Foam Filled ◽  
Energy Absorbing

In this study, the researcher carried out a comparative investigation of the crashworthy features of different tubular structures with a quasi-static three bending point, like the foam-filled two and tri circular tube structures. Energy absorption capacities and failure modes of different structures are also studied. Furthermore, the general characteristics are investigated and compared for instance the energy absorption, specific energy absorption and energy-absorbing effectiveness for determining the potential structural components that can be used in the field of vehicle engineering. Experimental results indicated that under the bending conditions, the tri foam-filled structures were higher crashworthiness behaviour than the two foam-filled circular structures. Therefore, this study recommended the use of crashworthy structures, such as foam-filled tri circular tubes due to the increased bending resistance and energy-absorbing effectiveness.

Stress and flexibility factors for multi-mitred pipe bends subjected to internal pressure combined with external loadings

1972 ◽  
Vol 7 (2) ◽  
pp. 97-108 ◽  
Author(s):  
M P Bond ◽  
R Kitching
Keyword(s):  
Internal Pressure ◽  
Large Diameter ◽  
Pipe Bend ◽  
Bending Tests ◽  
Bending Load ◽  
Out Of Plane ◽  
Thin Walled ◽  
Plane Bending ◽  
Internal Pressures ◽  
Stress Patterns

The stress analysis of a multi-mitred pipe bend when subjected to an internal pressure and a simultaneous in-plane or out-of-plane bending load has been developed. Stress patterns and flexibility factors calculated by this analysis are compared with experimental results from a large-diameter, thin-walled, three-weld, 90° multi-mitred bend which was subjected to in-plane bending tests at various internal pressures.

scholarly journals Energy Absorbing Effectiveness – Different Approaches

2018 ◽  
Vol 12 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Maria Kotełko ◽  
Mirosław Ferdynus ◽  
Jacek Jankowski
Keyword(s):  
Impact Load ◽  
Geometrical Parameters ◽  
Foam Filled ◽  
Thin Walled ◽  
Energy Absorbers ◽  
Energy Absorbing ◽  
Selection Of

AbstractIn the paper the study of different crashworthiness indicators used to evaluate energy absorbing effectiveness of thin-walled energy absorbers is presented. Several different indicators are used to assess an effectiveness of two types of absorbing structures, namely thin-walled prismatic column with flaws and thin-walled prismatic frustum (hollow or foam filled) in both cases subjected to axial compressive impact load. The indicators are calculated for different materials and different geometrical parameters. The problem of selection of the most appropriate and general indicators is discussed.

scholarly journals Design and finite element simulations of aluminium foam-filled thin-walled tubes

2005 ◽  
Vol 37 (2/3) ◽  
pp. 126 ◽  
Author(s):  
A.G. Hanssen ◽  
A. Reyes ◽  
O.S. Hopperstad ◽  
M. Langseth
Keyword(s):  
Finite Element ◽  
Finite Element Simulations ◽  
Aluminium Foam ◽  
Foam Filled ◽  
Thin Walled

Energy Absorption and Deformation Modes of Thin PVC Tubes Internally Grooved When Subjected to Axial Plastic Collapse

1989 ◽  
Vol 203 (1) ◽  
pp. 1-8 ◽  
Author(s):  
A G Mamalis ◽  
D E Manolakos ◽  
G L Viegelahn ◽  
W Johnson
Keyword(s):  
Failure Modes ◽  
Experimental Investigations ◽  
Collapse Mechanism ◽  
Plastic Collapse ◽  
Constant Depth ◽  
The Mean ◽  
Thin Walled ◽  
Energy Absorbing ◽  
Deformation Modes ◽  
Good Agreement

Theoretical and experimental investigations into the quasi-static plastic collapse of thin-walled PVC tubes containing a number of geometrical discontinuities in the form of internal axial grooves of constant depth, with the aim of providing information about its behaviour as an energy-absorbing device, are reported. An inextensional collapse mechanism for folding the shell in a non-symmetrical diamond fold mode, taking into account stationary, circumferential, inclined and travelling plastic hinges, is considered. The failure modes and the mean postbuckling load necessary to perform the operation are discussed. Predicted results based on the collapse modes encountered, when compared with those obtained experimentally were found to be in good agreement.

Study on Three-Point Bending Mechanical Performance of Thin-Walled Super Alloy Honeycomb Sandwich with Penetrable Defects

2011 ◽  
Vol 314-316 ◽  
pp. 1203-1209
Author(s):  
Kai Yang ◽  
Li Wu Liu ◽  
Kai Ping Yu ◽  
Xiang Hao Kong
Keyword(s):  
Failure Modes ◽  
Mechanical Performance ◽  
Lower Plate ◽  
Three Point Bending ◽  
Fracture Failure ◽  
Bending Load ◽  
Honeycomb Sandwich ◽  
Different Types ◽  
Thin Walled ◽  
Super Alloy

By three-point bending experiments on XY-plane of thin-walled super alloy honeycomb sandwich with different types and dimensions of penetrable defects, their failure modes and influence of defects of different types and dimensions on their mechanical properties are researched by observing failure modes and performance curves of test samples. Researches show that when failure occurs on sandwich structures under three-point loading, vertical to XY-plane, buckling depression occurs on center part of the upper plate along with fracture failure occurring on center part of the lower plate. Similar to three-point experiment on conventional structures, failure always occurs in the longitudinal regions near middle loading area. When lateral walls of honeycomb or strengthen points of welding are set at center loading area, fracture failure occurs on the lower plate, or only buckling deformation occurs on honeycomb cores. And by comparison, FE model can be used to evaluate its mechanical performance of thin-walled super alloy honeycomb sandwich with penetrable defects under three-point bending load. It is the experimental basis for improving the structural reliability and damage tolerance of the structure.

Dynamic three-point bending tests on aluminium foam filled steel tubes

2012 ◽  
pp. 517-524
Author(s):  
G Rathnaweera ◽  
D Ruan ◽  
V Nagaraj ◽  
Y Durandet
Keyword(s):  
Aluminium Foam ◽  
Steel Tubes ◽  
Bending Tests ◽  
Three Point Bending ◽  
Foam Filled
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