Computational Modelling of Closed-Cell Aluminium Foams to Investigate Structural Deformation under Quasi-Static Loading

2016 ◽  
Vol 846 ◽  
pp. 133-138 ◽  
Author(s):  
Md Abdul Kader ◽  
Md Ashraful Islam ◽  
Paul Jonathan Hazell ◽  
Juan Pablo Escobedo ◽  
Mohammad Saadatfar ◽  
...  
Keyword(s):  
Cell Walls ◽  
Computational Modelling ◽  
Deformation Mechanisms ◽  
Structural Deformation ◽  
Micro Computed Tomography ◽  
Static Compression ◽  
Closed Cell ◽  
Scale Modelling ◽  
Internal Deformation ◽  
Quasi Static Compression

Computational modelling has been performed to understand the deformation mechanisms of closed-cell aluminium foams under quasi-static compression. A micro-computed tomography-based 3D foam geometry was developed that described the interior of the foam. The FE software ABAQUS/Explicit has been used for the present meso-scale modelling. A good correlation of load-strain response was found between the simulations and experimental results. A sectional view was observed during deformation to explore the internal deformation mechanisms. It was revealed that localized cell collapse occurs due to complex movements of the cell-walls with thin/weaker cells being deformed faster than thick/stronger cells.

scholarly journals Energy Absorption of Different Cell Structures for Closed-Cell Foam-Filled Tubes Subject to Uniaxial Compression

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1579 ◽  
Author(s):  
Yang Yu ◽  
Zhuokun Cao ◽  
Ganfeng Tu ◽  
Yongliang Mu
Keyword(s):  
Energy Absorption ◽  
Absorption Efficiency ◽  
Foam Core ◽  
Aluminum Foams ◽  
Static Compression ◽  
Cell Structures ◽  
Closed Cell ◽  
Energy Absorption Efficiency ◽  
Foam Filled ◽  
Quasi Static Compression

The energy absorption of different cell structures for closed-cell aluminum foam-filled Al tubes are investigated through quasi-static compression testing. Aluminum foams are fabricated under different pressures, obtaining aluminum foams with different cell sizes. It is found that the deformation of the foam core is close to the overall deformation, and the deformation band is seriously expanded when the cell size is fined, which leads to the increase of interaction. Results confirm that the foam-filled tubes absorb more energy due to the increase of interaction between the foam core and tube wall when the foaming pressure increases. The energy absorption efficiency of foam-filled tubes can reach a maximum value of 90% when the foam core is fabricated under 0.30 MPa, which demonstrates that aluminum foams fabricated under increased pressure give a new way for the applications of foam-filled tubes in the automotive industry.

Effect of Laser Forming on the Energy Absorbing Behavior of Metal Foams

2021 ◽  
pp. 1-29
Author(s):  
Tom Zhang ◽  
Yubin Liu ◽  
Nathan Ashmore ◽  
Wayne Li ◽  
Y. Lawrence Yao
Keyword(s):  
Metal Foam ◽  
Laser Forming ◽  
Compression Tests ◽  
Forming Process ◽  
Static Compression ◽  
Closed Cell ◽  
Similarities And Differences ◽  
Energy Absorbing ◽  
The Impact ◽  
Quasi Static Compression

Abstract Metal foam is light in weight and exhibits an excellent impact absorbing capability. Laser forming has emerged as a promising process in shaping metal foam plates into desired geometry. While the feasibility and shaping mechanism has been studied, the effect of the laser forming process on the mechanical properties and the energy absorbing behavior in particular of the formed foam parts has not been well understood. This study comparatively investigated such effect on as-received and laser formed closed-cell aluminum alloy foam. In quasi-static compression tests, attention paid to the changes in the elastic region. Imperfections near the laser irradiated surface were closely examined and used to help elucidate the similarities and differences in as-received and laser formed specimens. Similarly, from the impact tests, differences in deformation and specific energy absorption were focused on, while relative density distribution and evolution of foam specimens were numerically investigated.

Compression Experiment And Failure Analysis of Additive Manufactured Multi-Layer Lattice Sandwich Structure

2021 ◽  
Author(s):  
Jun Yan ◽  
Cuncun Jiang ◽  
Zhirui Fan ◽  
Qi Xu ◽  
Hongze Du ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Failure Mode ◽  
Sandwich Structure ◽  
Sandwich Structures ◽  
Element Model ◽  
Structural Deformation ◽  
Displacement Curve ◽  
Static Compression ◽  
Quasi Static Compression

The rapid development of additive manufacturing technology provides a new opportunity for the fabrication and research of multi-layer lattice sandwich structures, and thereby some excellent performances can be further discovered. Based on the manufacturing-experiment-analysis technical route, the failure mode of the additive manufactured aluminum multi-layer alloy lattice sandwich structure under quasi-static compression is systematically studied in this paper. Through the combination of experimental observation and finite element analysis, the complex failure mechanism of the multi-layer lattice sandwich structure is revealed. The results show that the multi-layer lattice sandwich structure under quasi-static compression conditions mainly manifests as a layer-by-layer failure mode of the internal lattice structure, which includes the yield, plastic buckling and material damage. At the same time, in comparison with the force–displacement curve and the structural deformation in the key locations, the analysis accuracy of the finite element model can be verified by the compression experiment. Based on the verified finite element model, the most significant influence of different face panel thicknesses, as well the rod radiuses and tilting angles on the energy absorption (EA) is identified via sensitivity analysis. Furthermore, size factors on the structural EA are revealed. This study can provide a helpful guidance for the design of multi-layer lattice sandwich structures in practical applications.

Deformation mechanisms of spherical cell porous aluminum under quasi-static compression

2018 ◽  
Vol 142 ◽  
pp. 32-35 ◽  
Author(s):  
Zhiqiang Fan ◽  
Bingbing Zhang ◽  
Yubo Gao ◽  
Xuefeng Guan ◽  
Peng Xu
Keyword(s):  
Spherical Cell ◽  
Deformation Mechanisms ◽  
Static Compression ◽  
Porous Aluminum ◽  
Quasi Static Compression

Experimental Investigation on the Energy Absorption Capability of Foam-Filled Nomex Honeycomb Structure

2013 ◽  
Vol 393 ◽  
pp. 460-466 ◽  
Author(s):  
Wan Luqman Hakim Wan Abdul Hamid ◽  
Yulfian Aminanda ◽  
Mohamed Shaik Dawood
Keyword(s):  
Experimental Investigation ◽  
Cell Walls ◽  
Honeycomb Structure ◽  
Polyurethane Foams ◽  
Low Density ◽  
Static Compression ◽  
Compression Loading ◽  
Foam Filled ◽  
Nomex Honeycomb ◽  
Quasi Static Compression

The effect of low density filler material comprising polyurethane foam on the axial crushing resistance of Nomex honeycomb under quasi-static compression conditions was analyzed. Honeycombs with two different densities, two different heights and similar cell size, along with five different densities of polyurethane foams were used in the research. A total of 14 unfilled Nomex honeycombs, 15 polyurethane foams, and 39 foam-filled Nomex honeycombs were subjected to quasi-static compression loading. The crushing load and capability of foam-filled Nomex honeycomb structure in absorbing the energy were found to increase significantly since the cell walls of honeycomb were strengthened by the foam filler; the walls did not buckle at the very beginning of compression loading. The failure mechanism of the foam-filled honeycomb was analyzed and compared with the unfilled honeycomb.

Quasi-Static and Dynamic Compressive Behaviors of Closed-Cell Stochastic Foams Based on Voronoi Model

2019 ◽  
Author(s):  
Jianyong Chen ◽  
Jun Liu ◽  
Yuansheng Cheng ◽  
Pan Zhang
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Dynamic Compression ◽  
Voronoi Tessellation ◽  
Three Dimensional ◽  
Static Compression ◽  
Plateau Stress ◽  
Closed Cell ◽  
Collapse Mode ◽  
Quasi Static Compression

Abstract Closed-cell stochastic foams are widely used in engineering field due to the excellent energy absorption capability. In this paper, the crushing response of three dimensional closed-cell foams is investigated under quasi-static and dynamic compression loading. Voronoi tessellation is employed to generate the mesoscale geometric models of closed-cell stochastic foams, and subsequently numerical analysis is carried out using LS-DYNA software. Results reveal that the plateau stress of Voronoi model under quasi-static compression linearly increases with the increase of relative density. In addition, the mechanical properties of Voronoi model under quasi-static and dynamic compression are related to a shear band collapse mode and a layer-wise collapse mode, respectively. The plateau stress and the densification strain under high-speed loading are higher than those under quasi-static and low-speed loading.

Compressive Behavior of Aluminium Foams Prepared by Powder Metallurgy Method

2012 ◽  
Vol 157-158 ◽  
pp. 600-603 ◽  
Author(s):  
Li Wei ◽  
Csaba Sinka ◽  
Simon Lawes ◽  
Tao Han
Keyword(s):  
Cell Wall ◽  
Cell Walls ◽  
Small Deformation ◽  
Structural Deformation ◽  
Powder Metallurgy Method ◽  
Aluminum Foams ◽  
Stress Strain ◽  
Compression Behavior ◽  
Closed Cell ◽  
Fracture Area

The compression behavior of closed cell aluminum foams with different density has been examined. Stress-strain curves were obtained. The microstructure evaluation of cell walls was investigated using X-ray computer tomography. A series of images of internal microstructures were given, the structural deformation evolution was analyzed. The images of cell wall evolution shown that crack appeared in cell wall after a small deformation of elastic deformation. As the compression proceeded, further cracks occur and some of the cell walls fracture. The fracture area become expanded, a part of dislocation on the sample side is formed. As the fracture area spreads, some regions become dense. The stress-strain curves showed brittle characteristics. As the relative density increases, yield strength and elastic modulus of aluminum foams increased. The best fit lines are obtained, where, is 0.97 and 0.2 respectively.

Sign in / Sign up

Export Citation Format

Share Document