Finite element analysis of the mechanical properties of cellular aluminium based on micro-computed tomography

Veyhl, C.; Belova, Irina V.; Murch, Graeme E.; Fiedler, Thomas

doi:10.1016/j.msea.2011.02.031

Cited by 88 publications

(81 citation statements)

References 23 publications

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“…For example, Vehyl et al [6] used CT data of M-Pore sponge and closed-cell Alporas foams to create FE models of foam. Miedzin´ska et al [7] used µ-CT data for modeling open-cell aluminum foams and observed good correlation between the numerical results obtained from their model and the experimental compressive tests.…”

Section: Introductionmentioning

confidence: 99%

CT-Based Micro-Mechanical Approach to Predict Response of Closed-Cell Porous Biomaterials to Low-Velocity Impact

et al. 2018

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Abstract:In this study, a new numerical approach based on CT-scan images and finite element (FE) method has been used to predict the mechanical behavior of closed-cell foams under impact loading. Micro-structural FE models based on CT-scan images of foam specimens (elastic-plastic material model with material constants of bulk aluminum) and macro-mechanical FE models (with crushable foam material model with material constants of foams) were constructed. Several experimental tests were also conducted to see which of the two noted (micro-or macro-) mechanical FE models can better predict the deformation and force-displacement curves of foams. Compared to the macro-structural models, the results of the micro-structural models were much closer to the corresponding experimental results. This can be explained by the fact that the micro-structural models are able to take into account the interaction of stress waves with cell walls and the complex pathways the stress waves have to go through, while the macro-structural models do not have such capabilities. Despite their high demand for computational resources, using micro-scale FE models is very beneficial when one needs to understand the failure mechanisms acting in the micro-structure of a foam in order to modify or diminish them.

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Section: Introductionmentioning

confidence: 99%

CT-Based Micro-Mechanical Approach to Predict Response of Closed-Cell Porous Biomaterials to Low-Velocity Impact

et al. 2018

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“…The local deformation mechanisms of the actual foam structure during compression were investigated using different mesh size discretizations in [39]. Closedcell aluminium foams in [40] and [41] and open cell aluminium foams in [42] to [44] were investigated numerically based on µCT images and the material response for compression was determined. The deformation and plastic collapse mechanisms of closed-cell aluminium foams were analysed with finite element method based on µCT.…”

Section: Introductionmentioning

confidence: 99%

Compressive Response Determination of Closed-Cell Aluminium Foam and Linear-Elastic Finite Element Simulation of μCT-Based Directly Reconstructed Geometrical Models

2018

SV-JME

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Metal foams have a lightweight cellular structure with excellent mechanical and physical properties. It is well known that metal foams have high compression strength combined with good energy absorption characteristics [1]. Therefore, the interest in these materials is widespread not only as a vibration damper or sound absorber but also as a load-bearing structural element. Numerous applications rely on the compressive property of metal foams, which directly depend on its structure. As a load-bearing structural element (e.g. vehicle part, biomedical implant) metal foam is expected to behave elastically under working circumstances, so the material response must be predicted precisely in the elastic region. Numerical determination of compressive properties of foam structure remains a demanding engineering task, and it is indispensable for design purposes.A number of studies have reported on measuring the material response of different types of metal foams in destructive ways. Geometrical modelling is an essential part of the procedure aiming the investigation of metal foam structures in a numerical way. Numerous approaches can be found in the literature for the proper description of foam structures, one of which is the usage of uniform cell models which results in simplified geometry compared with the actual structure. A combination of spherical and cruciform-shaped cells was used to model closed-cell aluminium foam and to simulate its material response in [11], while different uniform cell structures were applied to the model and simulate open cell metal foams in [12] to [14]. Diamond and cubic cell foam structure were also used to simulate the effect of cell shape on the mechanical behaviour of open cell metal foams in [15].Since the inner structure of different types of metal foams is quite complicated, a surface analysis can result in imperfect or false data. Recent studies proved X-ray computed tomography to be an efficient and powerful tool for mapping the complete structure • Calculations based on geometrical model precisely described the compressive response in the elastic region. Compressive Response Determination of Closed-Cell Aluminium Foam and Linear-Elastic Finite Element Simulation of µCT-Based Directly Reconstructed Geometrical Models

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“…Structural parameters of commercially available foams such as porosity, specific surface, mean strut diameter and mean pore diameter are commonly studied with use of μCT [5][6][7][8][9]. Furthermore Open-Cell Porous Materials could imitate various natural materials where porosity is key parameter for structural characteristic [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Young's modulus and Poisson's ratio, is a more complex process. Extensive research performed in recent years in this area includes experimental [12,13], analytical [14] and numerical [15,16] approaches. Numerical analysis uses both simplified model structures, and calculation models derived from X-ray micro-computed tomography (μCT) data [17].…”

Section: Introductionmentioning

confidence: 99%

Design of Mechanical Properties of Open-Cell Porous Materials Based on μCT Study of Commercial Foams

Skibiński

Ćwieka

Wejrzanowski

et al. 2015

MATEC Web of Conferences

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Abstract. In the present paper numerical design of mechanical properties of open-cell porous materials is addressed. A detailed knowledge of mechanisms and parameters determining mechanical properties (i.e. Young's Modulus, Poisson's Ratio) of foams is essential for applications such as energy absorbers or lightweight construction materials. The foam structures were designed using procedure based on Laguerre-Voronoi tessellations (LVT) with microcomputed tomography of commercial foams used as reference. Foam morphology was studied on post-processed computed tomography images and the parameters of LVT structures were compared with commercial materials. Subsequently finite element method (FEM) calculations were performed on both types of structures to validate the LVT design algorithm. The results show that the described design procedure can be successfully used for modeling mechanical properties of open-cell foam structures.

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Finite element analysis of the mechanical properties of cellular aluminium based on micro-computed tomography

Cited by 88 publications

References 23 publications

CT-Based Micro-Mechanical Approach to Predict Response of Closed-Cell Porous Biomaterials to Low-Velocity Impact

CT-Based Micro-Mechanical Approach to Predict Response of Closed-Cell Porous Biomaterials to Low-Velocity Impact

Compressive Response Determination of Closed-Cell Aluminium Foam and Linear-Elastic Finite Element Simulation of μCT-Based Directly Reconstructed Geometrical Models

Design of Mechanical Properties of Open-Cell Porous Materials Based on μCT Study of Commercial Foams

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