Project detail

Micro-structurally induced shielding effects in toughening of ceramic matrix composites

Duration: 01.01.2006 — 31.12.2008

Funding resources

Czech Science Foundation - Standardní projekty

- whole funder (2006-01-01 - 2008-12-31)

On the project

Navrhovaný projekt je zaměřen na řešení stínících účinků v kompozitech s krátkými vlákny a křehkými částicemi ve tvaru destiček. V obou případech představuje klíčový příspěvek kezhouževnatění ohyb trhlin, jejich šíření podél materiálových rozhraní, resp. přemostění, a zejména synergie těchto mechanismů. Z experimentálního hlediska budou předmětem zájmu kompozity tvořené skelnou borosilikátovou matricí s odstupňovaným podílem

Description in English
Brittle matrix composites represent a group of perspective materials. Despite of a relatively large progress in experimental and theoretical research of these materials there remains a wide range of unsolved problems that may by crucial for further development of the abovementioned group of composites. In contrast to the preceding project (GAČR 101/02/0683) focused to the problems of brittle matrix toughening by metal particles and/or long fibres, the project proposed aims to focus to crack shielding effects in brittle matrix composites reinforced by short fibres or brittle platelets. In both cases the key toughening effect of the reinforcement is due to contribution of several mechanisms, including debonding and microcrack propagation along material interfaces, crack deflection, crack bridging and, especially, the synergism of those mechanisms.

Keywords
kompozitní materiály, trhlina, zhouževnatění lomu

Key words in English
composite materials; crack shielding; fracture toughness

Mark

GA106/06/0724

Default language

Czech

People responsible

Dlouhý Ivo, prof. Ing., CSc. - fellow researcher
Kotoul Michal, prof. RNDr., DrSc. - principal person responsible

Units

Institute of Solid Mechanics, Mechatronics and Biomechanics
- beneficiary (2006-01-01 - 2008-12-31)

Results

KOTOUL, M., VYSLOUŽIL, T., DLOUHÝ, I. Stable crack growth modelling in unidirectional fibre-reinforced britle matrix composites. In ESMC2006. Budapest: Budapest University of Technology and Economics, 2006. p. 125 ( p.)ISBN: 9638724404.
Detail

KOTOUL, M.; PROFANT, T.; ŠEVEČEK, O. Analysis of Multiple Cracks in Thin Coating on Orthotropic Substrate. In Multilevel Approach to Fracture of Materials, Components and Structures. 1. Czech Republic: VUTIUM Brno, 2008. p. 170-177. ISBN: 9781617823190.
Detail

PROFANT, T.; KOTOUL, M.; ŠEVEČEK, O. Stronger and weaker singularity of an inclined crack terminating at the orthotropic bimaterial interface. In 17th European conference on fracture. Brno: VITIUM, 2008. p. 170-170. ISBN: 9781617823190.
Detail

ŘEHOŘEK, L. TENSILE STRENGTH OF CERAMIC CELLULAR MATERIALS. In NEW METHODS OF DAMAGE AND FAILURE ANALYSIS OF STRUCTURAL PARTS. 2008. p. 245-251. ISBN: 978-80-248-1813-9.
Detail

PROFANT, T.; ŠEVEČEK, O.; KOTOUL, M. The Analysis of the Stress and Displacement Field Near the Surface Crack Tip Terminating Perpendicular to the Interface Between Two Orthotropic Materials. Materials Science Forum, 2007, vol. 567, no. 1, p. 137-140. ISSN: 0255-5476.
Detail

KOTOUL, M.; VYSLOUŽIL, T.; BOCCACCINI, A.; DLOUHÝ, I. Crack growth in glass matrix composite reinforced by long SiC fibres. Theoretical and Applied Fracture Mechanics, 2007, vol. 49, no. x, p. 158-170. ISSN: 0167-8442.
Detail

KOTOUL, M.; POKLUDA, J.; ŠANDERA, P.; DLOUHÝ, I.; CHLUP, Z.; BOCCACCINI, A. Toughening effects quantification in glass matrix composite reinforced by alumina platelets. Acta materialia, 2008, vol. 56, no. 12, p. 2908-2918. ISSN: 1359-6454.
Detail

KLUSÁK, J.; PROFANT, T.; KOTOUL, M. A comparison of two direct methods of generalized stress intesity factor calculations of bi-material notches. Key Engineering Materials (print), 2008, vol. 385, no. 1, p. 409-412. ISSN: 1013-9826.
Detail

CHLUP, Z.; DLOUHÝ, I.; GÜRBÜZ, S.; DERICIOGLU, A.; KOZÁK, V. Interfacial characterisation in transparent spinel matrix reinforced by SiC fibre. Key Engineering Materials (print), 2009, vol. 413, no. 4, p. 252-259. ISSN: 1013-9826.
Detail

DLOUHÝ, I.; ŘEHOŘEK, L.; CHLUP, Z. Tensile Properties of Open Cell Ceramic Foams. Key Engineering Materials (print), 2009, vol. 413, no. 4, p. 168-175. ISSN: 1013-9826.
Detail

HADRABA, H.; MACA, K.; CHLUP, Z. Alumina and Zirconia Based Layered Composites: Part 1 Preparation. Key Engineering Materials (print), 2009, vol. 412, no. 1, p. 221-226. ISSN: 1013-9826.
Detail

PROFANT, T.; KOTOUL, M. On the inclined surface crack terminating at the orthotropic bimaterial interface. Key Engineering Materials (print), 2008, vol. 385, no. 1, p. 541-544. ISSN: 1013-9826.
Detail

PROFANT, T.; ŠEVEČEK, O.; KOTOUL, M.: The evaluation of the exponent singularity and corresponding eigenvectors of the problem of the crack terminating perpendicular to the interface between two orthotropic materials. http://www.maplesoft.com/applications/app_center_view.aspx?AID=2231. URL: http://www.maplesoft.com/applications/view.aspx?SID=5742. (software)
Detail

VYSLOUŽIL, T.; KOTOUL, M.: The problem of the bridging crack. http://vyslouzil.fvtm.ujep.cz/maple/. (software)
Detail

Responsibility: Kotoul Michal, prof. RNDr., DrSc.