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Original title:
Prediction of the Traction Separation Law of Ceramics Using Iterative Finite Element Modelling
Authors: Kozák, Vladislav ; Chlup, Zdeněk ; Padělek, P. ; Dlouhý, Ivo
Document type: Papers
Conference/Event: MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./, Brno (CZ), 20160627
Year: 2017
Language: eng
Abstract: Specific silicon nitride ceramics, the influence of the grain size and orientation on the bridging mechanisms was found. In ceramic matrix composites, crack-bridging mechanisms can provide substantial toughness enhancement coupled with the same and/or increased strength. The prediction of the crack propagation through interface elements based on the fracture mechanics approach and cohesive zone model is investigated. From a number of damage concepts the cohesive models seem to be especially attractive for the practical applications. Within the standard finite element package Abaqus a new finite element has been developed; it is written via the UEL (user’s element) procedure. Its shape can be modified according to the experimental data for the set of ceramics and composites. The element seems to be very stable from the numerical point a view. The shape of the traction separation law for four experimental materials is estimated via the iterative procedure based on the FEM modeling and experimentally determined displacement in indentation experiments, J-R curve is predicted and stability of the bridging law is tested.
Keywords: cohesive zone model; finite element user’s procedure; Si3N4 composite
Project no.: GA14-11234S (CEP)
Funding provider: GA ČR
Host item entry: Materials Structure & Micromechanics of Fracture VIII, ISBN 978-3-03835-626-4, ISSN 1662-9779
Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0271376
Permalink: http://www.nusl.cz/ntk/nusl-373362
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Authors: Kozák, Vladislav ; Chlup, Zdeněk ; Padělek, P. ; Dlouhý, Ivo
Document type: Papers
Conference/Event: MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./, Brno (CZ), 20160627
Year: 2017
Language: eng
Abstract: Specific silicon nitride ceramics, the influence of the grain size and orientation on the bridging mechanisms was found. In ceramic matrix composites, crack-bridging mechanisms can provide substantial toughness enhancement coupled with the same and/or increased strength. The prediction of the crack propagation through interface elements based on the fracture mechanics approach and cohesive zone model is investigated. From a number of damage concepts the cohesive models seem to be especially attractive for the practical applications. Within the standard finite element package Abaqus a new finite element has been developed; it is written via the UEL (user’s element) procedure. Its shape can be modified according to the experimental data for the set of ceramics and composites. The element seems to be very stable from the numerical point a view. The shape of the traction separation law for four experimental materials is estimated via the iterative procedure based on the FEM modeling and experimentally determined displacement in indentation experiments, J-R curve is predicted and stability of the bridging law is tested.
Keywords: cohesive zone model; finite element user’s procedure; Si3N4 composite
Project no.: GA14-11234S (CEP)
Funding provider: GA ČR
Host item entry: Materials Structure & Micromechanics of Fracture VIII, ISBN 978-3-03835-626-4, ISSN 1662-9779
Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0271376
Permalink: http://www.nusl.cz/ntk/nusl-373362
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Record created 2018-03-09, last modified 2021-11-24