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Digital image based numerical micromechanics of geocomposites with application to chemical grouting
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SYSNO ASEP 0444238 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Digital image based numerical micromechanics of geocomposites with application to chemical grouting Author(s) Blaheta, Radim (UGN-S) RID, SAI, ORCID
Kohut, Roman (UGN-S) RID
Kolcun, Alexej (UGN-S) RID
Souček, Kamil (UGN-S) RID, ORCID
Staš, Lubomír (UGN-S) RID, ORCID
Vavro, Leona (UGN-S) RIDSource Title International Journal of Rock Mechanics and Mining Sciences. - : Elsevier - ISSN 1365-1609
Roč. 77, July 2015 (2015), s. 77-88Number of pages 12 s. Publication form Online - E Language eng - English Country GB - United Kingdom Keywords geocomposites ; upscaling ; digital CT image based FEM ; identification of material parameters Subject RIV DB - Geology ; Mineralogy R&D Projects GA105/09/1830 GA ČR - Czech Science Foundation (CSF) ED1.1.00/02.0070 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UGN-S - RVO:68145535 UT WOS 000356061300009 EID SCOPUS 2-s2.0-84928138542 DOI 10.1016/j.ijrmms.2015.03.012 Annotation The presented paper describes procedures of numerical upscaling and experience with X-ray CT based finite element (FEM) analysis of properties of geocomposites. The upscaling technique is used for obtaining the macro-level response of material by loading test (representative) volumes with described micro-level structure. The application is focused on geocomposites arising from chemical grouting of coal substances. The obtained (homogenized) macro-level properties serve for solving stability problems by numerical modeling in geotechnical engineering. The paper touches several interacting topics – numerical upscaling and understanding to its results; application of X-ray computed tomography (CT) for visualization of structure of geomaterials; processing the digital image data for constructing FEM models of test volumes; numerical testing of digitalized samples for obtaining homogenized properties and clearing up sensitivity to changes in local material properties, micro-level structure and FE mesh; validation of numerical results by comparison with laboratory testing of samples; use of identification technique for refining the local material properties and calibration of the upscaling procedure. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2016 Electronic address https://www.sciencedirect.com/science/article/pii/S1365160915000623?via%3Dihub
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