3D Model of Crack Propagation in Particulate Ceramic Composite Containing Residual Stresses

0481253 - ÚFM 2018 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Štegnerová, Kateřina - Majer, Zdeněk - Hutař, Pavel - Náhlík, Luboš
3D Model of Crack Propagation in Particulate Ceramic Composite Containing Residual Stresses.
Advances in Fracture and Damage Mechanics XVI. Zurich: Trans Tech Publications Ltd, 2017 - (Mariano, P.; Baragetti, S.; Casavola, K.; Pappalettere, C.; Aliabadi, F.), s. 103-106. Key Engineering Materials, 754. ISBN 978-3-0357-1168-4. ISSN 1662-9795.
[FDM 2017 - International Conference on Fracture and Damage Mechanics /16./. Florence (IT), 18.07.2017-20.07.2017]
Institucionální podpora: RVO:68081723
Klíčová slova: ceramic particulate composite * sub-critical crack growth * residual stresses
Obor OECD: Audio engineering, reliability analysis

A crack propagation and fracture behaviour of particulate ceramic composite were investigated. Influence of 3D shape of particles on the crack propagation was studied together with influence of the presence of residual stresses, which are developed inside the composite during manufacturing process. Finite element (FE) method was used for numerical simulation of propagating crack in the composite. Basic numerical models of low-temperature co-fired ceramics (LTCC) with alumina particles homogenously dispersed in the glass matrix were developed. Volume fraction of alumina phase was 20vol.%, which is typical amount for LTCC. The results show that existence of residual stresses retards the crack propagating under conditions of sub-critical crack growth (SCG). Presented results contribute to a better understanding of the role of residual stresses in particulate ceramic composites.
Trvalý link: http://hdl.handle.net/11104/0276878