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Computational analysis of crack-like defects influence on the open cell ceramic foam tensile strength
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SYSNO ASEP 0495409 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Computational analysis of crack-like defects influence on the open cell ceramic foam tensile strength Author(s) Ševeček, O. (CZ)
Majer, Z. (CZ)
Marcián, P. (CZ)
Bertolla, Luca (UFM-A) ORCID
Kotoul, M. (CZ)Number of authors 5 Source Title Advances in Fracture and Damage Mechanics XVII. - Zürich : Trans Tech Publications, 2018 / Aliabadi F.M.H. ; Rodriguez-Tembleque L. ; Dominguez J. - ISSN 1013-9826 - ISBN 978-3-0357-1350-3 Pages s. 271-276 Number of pages 6 s. Publication form Print - P Action FDM 2018 - International Conference on Fracture and Damage Mechanics /17./ Event date 04.09.2018 - 06.09.2018 VEvent location Bangkok Country TH - Thailand Event type WRD Language eng - English Country CH - Switzerland Keywords Ceramic foam ; Crack defect ; FEM ; Fracture ; Tensile test Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass OECD category Ceramics Institutional support UFM-A - RVO:68081723 EID SCOPUS 85053043747 DOI 10.4028/www.scientific.net/KEM.774.271 Annotation This work deals with a computational analysis and quantification of the influence of processing (primarily crack-like) defects of various amount on the (tensile) strength of open cell ceramic foam structures. This information is essential e.g. for application of these materials in the mechanically loaded application, where a design with certain reliability to operating conditions is required. The analysed ceramic foam structures are composed of both regular and irregular cells and crack-like defects (pre-cracked struts) are simulated inside them. The foam structure is modelled using a 3D FE beam element based model created by utilization of the Voronoi tessellation technique. The tensile strength upon presence of various amount of pre-cracked struts is analysed based upon an iterative FE simulation on whose base the critical failure force leading to specimen fracture is determined. The performed parametric study relates the tensile strength of the foam structure to the amount of initial defects. With increasing amount of these defects, the foam strength decreases by approximately 30% with every 10% of broken struts. This information can be directly used for a fast estimation of the foam tensile strength if the fraction of broken struts to the intact ones is known (e.g. from a microscopic analysis). Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2019
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