3-Dimensional Digital Image Correlation for Strains Determination in Clayey Soil

Abstract:

Landfills come with a cover barrier which includes a compacted clay liner essential to safety on site. Unfortunately differential settlement may cause stress in the clay layer leading to the development of cracks. This is why tensile stress damage and shearing are observed on the cap cover. Due to difficulties of strains determination in clayey soil during direct tensile tests a 3-dimensional digital image correlation is used. Two digital cameras are used at a constant distance from the sample tested. Pictures taken at preset intervals are post-processed to extract specimen strain and strain localization. The suitability of this method is discussed in regards of experimental results. This technique is particularly well adapted to the clayey soils when conventional measurements are impossible.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 463-466
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.463
• Online since: August 2013
• Authors: Olivier Plé, Ali Tourabi, Murad S. Abuaisha
• Keywords: 3D Digital Image Correlation, Clay Layer, Crack Initiation, Direct Tensile Test

References

[1] S. Camp, J.P. Gourc, O. Ple, P. Villard: Mechanical behaviour of a clay layer for landfill caps cover application: experimental investigation and numerical modelling, Theoretical and Numerical Unsaturated Soil Mechanics Springer Publishers Vol. 113 (2007).

DOI: 10.1007/3-540-69876-0_21

[2] S. Camp, J.P. Gourc, O. Ple: Landfill clay barrier subjected to cracking: Multi-scale analysis of bending tests, Applied Clay Science Vol. 48 N°3 (2010), p.384–392.

DOI: 10.1016/j.clay.2010.01.011

[3] P. Gachet, F. Geiser, L. Laloui, L. Vulliet: Automated digital image processing for volume change measurement in triaxial cells, Geotechnical Testing Journal Vol. 30 N°2 (2007), pp.98-103.

DOI: 10.1520/gtj100309

[4] O. Siret, A. Tourabi, C. Desrayaud: Cold weldability of aluminium: Contribution of the mechanical loadings to the formation of metallic bonds, Journal of Materials Processing Technology Vol. 212 N°11 (2012), pp.2424-2432.

DOI: 10.1016/j.jmatprotec.2012.07.005

[5] J. Graham, G.T. Houlsby: Anisotropic elasticity of a natural clay, Geotechnique, Vol. 32 N°2 (1983), pp.165-180.

[6] O. Ple, H. Lê, P. Gotteland: A mechanical approach for fibre-reinforced clay in landfill caps cover application, European Journal of Environmental and Civil Engineering Vol. 13 N°1 (2009), p.53–69.

DOI: 10.1080/19648189.2009.9693085

[7] O. Ple, O. Bayard: Preliminary study of multiscale analysis in fibre reinforced concrete, Materials and Structures Vol. 35 N°249 (2002), p.279–284.

DOI: 10.1007/bf02482133