Original title: Lifetime Assessment of Particulate Ceramic Composite with Residual Stresses
Authors: Náhlík, Luboš ; Majer, Zdeněk ; Štegnerová, Kateřina ; Hutař, Pavel
Document type: Papers
Conference/Event: FDM 2017 International Conference on Fracture and Damage Mechanics /16./, Florence (IT), 20170718
Year: 2017
Language: eng
Abstract: A micro-crack propagation in particulate ceramic based composite was studied using finite element method (FEM). Subcritical crack growth (SCG) was numerically simulated under complex load conditions (mechanical loading and loading by internal residual stresses). The effect of residual stresses on the crack propagation was studied. Two-dimensional computational model of particulate ceramic composite with material properties corresponding to low temperature co-fired ceramics (LTCC) was developed. The results indicate that the presence of residual stresses significantly reduces values of stress intensity factor in the vicinity of composite surface and the direction of residual stresses around the particles contributes to the micro-crack deflection from the particles. The time to failure of the composite under mechanical loading was determined. Results obtained contribute to a better understanding of the role of residual stresses during micro-crack propagation in ceramic particulate composites.
Keywords: ceramic particulate composite; residual stresses; sub-critical crack growth
Project no.: GA15-09347S (CEP), LM2015069 (CEP)
Funding provider: GA ČR, GA MŠk
Host item entry: Advances in Fracture and Damage Mechanics XVI, ISBN 978-3-0357-1168-4, ISSN 1662-9795

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/11104/0276930

Permalink: http://www.nusl.cz/ntk/nusl-373306


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