scholarly journals Comparison of the Mechanical Behaviour of Standard and Auxetic Foams by X-ray Computed Tomography and Digital Volume Correlation

Strain ◽  
2013 ◽  
Vol 49 (6) ◽  
pp. 467-482 ◽  
Author(s):  
F. Pierron ◽  
S. A. McDonald ◽  
D. Hollis ◽  
J. Fu ◽  
P. J. Withers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Mechanical Behaviour ◽  
Digital Volume Correlation ◽  
X Ray ◽  
X Ray Computed

X-Ray Computed Tomography Based Modelling of Polymeric Foams

2010 ◽  
Vol 638-642 ◽  
pp. 2761-2765 ◽  
Author(s):  
J.G.F. Wismans ◽  
J.A.W. van Dommelen ◽  
L.E. Govaert ◽  
H.E.H. Meijer
Keyword(s):  
Computed Tomography ◽  
Finite Element ◽  
Mechanical Behaviour ◽  
Experimental Approach ◽  
Mechanical Response ◽  
Polymer Foams ◽  
Polymeric Foams ◽  
X Ray ◽  
X Ray Computed

A hybrid numerical-experimental approach is used to characterize the macroscopic mechanical behaviour of polymer foams. The method is based on characterization of foams with X-ray Computed Tomography and conversion of the data to Finite Element (FE) models. Results of FE analyses revealed that plasticity has a large influence on the mechanical response of these structures.

scholarly journals Understanding the mechanisms of root-reinforcement in soils: soil shear tests using X-ray computed tomography and digital volume correlation

2019 ◽  
Vol 92 ◽  
pp. 12009
Author(s):  
Daniel Bull ◽  
Ian Sinclair ◽  
Fabrice Pierron ◽  
Tiina Roose ◽  
Joel Smethurst
Keyword(s):  
Computed Tomography ◽  
Three Dimensions ◽  
Digital Volume Correlation ◽  
Strain Component ◽  
Multiscale Models ◽  
Root Reinforcement ◽  
Length Scales ◽  
X Ray ◽  
Shearing Resistance ◽  
X Ray Computed

Soil containing plant roots may be expected to exhibit a greater shearing resistance compared with the same ‘unreinforced’ soil, providing enhanced stability and effective erosion control, particularly for earth slopes. To be able to rely on the improved shearing resistance and stiffness of root-reinforced soils, it is important to understand and quantify the effectiveness of root reinforcement. This requires sophisticated multiscale models, building understanding at different length scales, from individual soil-root interaction through to full soil-profile or slope scale. One of the challenges with multiscale models is ensuring that they are representative of real behaviour, and this requires calibration to detailed high-quality experiments. The focus of the work presented was to capture and quantify root-reinforcement behaviour and associated soil and root deformation mechanisms during direct shear at the macroscopic to millimetre length scales. A novel shear box was developed to operate within a large-scale X-ray computed tomography (CT) scanner. Tests were interrupted to be scanned at a series of shear displacements from 0-20 mm to capture the chronology of behaviour in three-dimensions. Digital volume correlation (DVC) was applied to the CT dataset to obtain full-field 3D displacement and strain component information. The study demonstrates feasibility of the technique and presents preliminary DVC results.

scholarly journals Mechanisms of root reinforcement in soils: an experimental methodology using four-dimensional X-ray computed tomography and digital volume correlation

2020 ◽  
Vol 476 (2237) ◽  
pp. 20190838
Author(s):  
D. J. Bull ◽  
J. A. Smethurst ◽  
I. Sinclair ◽  
F. Pierron ◽  
T. Roose ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Shear Loading ◽  
Soil Reinforcement ◽  
Experimental Methodology ◽  
Digital Volume Correlation ◽  
X Ray ◽  
Reinforced Soils ◽  
Multi Scale ◽  
X Ray Computed

Vegetation on railway or highway slopes can improve slope stability through the generation of soil pore water suctions by plant transpiration and mechanical soil reinforcement by the roots. To incorporate the enhanced shearing resistance and stiffness of root-reinforced soils in stability calculations, it is necessary to understand and quantify its effectiveness. This requires integrated and sophisticated experimental and multi-scale modelling approaches to develop an understanding of the processes at different length scales, from individual root–soil interaction through to full soil-profile or slope scale. One of the challenges with multi-scale models is ensuring that they sufficiently closely represent real behaviour. This requires calibration against detailed high-quality and data-rich experiments. This study presents a novel experimental methodology, which combines in situ direct shear loading of a willow root-reinforced soil with X-ray computed tomography to capture the three-dimensional chronology of soil and root deformation within the shear zone. Digital volume correlation (DVC) analysis was applied to the computed tomography dataset to obtain full-field three-dimensional displacement and strain information. This paper demonstrates the feasibility and discusses the challenges associated with DVC experiments on root-reinforced soils.

scholarly journals X-ray computed tomography coupled to Digital Volume Correlation applied to a stationary crack case

2010 ◽  
Vol 6 ◽  
pp. 42015 ◽  
Author(s):  
Y. Barranger ◽  
P. Doumalin ◽  
J.C. Dupré ◽  
A. Germaneau ◽  
S. Hédan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Digital Volume Correlation ◽  
Stationary Crack ◽  
X Ray ◽  
X Ray Computed

Interior fracture analysis of rubber-cement composites based on X-ray computed tomography and digital volume correlation

2020 ◽  
Vol 259 ◽  
pp. 119833 ◽  
Author(s):  
Shuxian Hong ◽  
Peng Liu ◽  
Jianchao Zhang ◽  
Chuan Kuang ◽  
Biqin Dong ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Fracture Analysis ◽  
Digital Volume Correlation ◽  
Cement Composites ◽  
X Ray ◽  
Rubber Cement ◽  
X Ray Computed

Application of Digital Volume Correlation to X-ray Computed Tomography Images of Shale

2020 ◽  
Vol 34 (11) ◽  
pp. 13636-13649 ◽  
Author(s):  
Tae Wook Kim ◽  
Wonjin Yun ◽  
Anthony R. Kovscek
Keyword(s):  
Computed Tomography ◽  
Digital Volume Correlation ◽  
X Ray ◽  
Computed Tomography Images ◽  
X Ray Computed

scholarly journals Mapping soil deformation around plant roots using in vivo 4D X-ray Computed Tomography and Digital Volume Correlation

2016 ◽  
Vol 49 (9) ◽  
pp. 1802-1811 ◽  
Author(s):  
S.D. Keyes ◽  
F. Gillard ◽  
N. Soper ◽  
M.N. Mavrogordato ◽  
I Sinclair ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Plant Roots ◽  
Digital Volume Correlation ◽  
Soil Deformation ◽  
X Ray ◽  
X Ray Computed
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