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Computation of Composite Strengths by Limit Analysis
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SYSNO ASEP 0506329 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve SCOPUS Title Computation of Composite Strengths by Limit Analysis Author(s) Sysala, Stanislav (UGN-S) RID, ORCID
Blaheta, Radim (UGN-S) RID, SAI, ORCID
Kolcun, Alexej (UGN-S) RID
Ščučka, Jiří (UGN-S) RID, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Pan, P. (CN)Number of authors 6 Source Title Key Engineering Materials. - : Scientific.Net - ISSN 1662-9795
Roč. 810, July 2019 (2019), s. 137-142Number of pages 6 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords composite materials ; compressive strength ; failure ; limit analysis ; CT based FEM Subject RIV BA - General Mathematics OECD category Applied mathematics R&D Projects LQ1602 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UGN-S - RVO:68145535 EID SCOPUS 85071176118 DOI https://doi.org/10.4028/www.scientific.net/KEM.810.137 Annotation The paper is focused on computation of a compressive strength of composite materials by
limit analysis. This method enables to determine the strength or other types of limit loads by solution of
a specific optimization problem. It is also capable to predict failure zones. Abilities of the method are
investigated on a particular composite – a laboratory prepared sample consisting of a hard coal matrix
and a polyurethane binder. This sample is chosen due to available CT images of the inner structure and
laboratory experiments. Appropriate yield criteria are proposed for the coal and the binder in order to
define the limit analysis problem. This problem is penalized and then discretized by higher order finite
elements. For numerical solution, the semismooth Newton method and adaptive mesh refinements are
also used. Numerical experiments in 2D for various CT scans and material parameters are performed.Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2020 Electronic address https://www.scientific.net/KEM.810.137
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