TY - GEN
T1 - Fracture analysis of model materials as a substitute of quasi-brittle ceramics
AU - Jimenez Pique, E.R.A.
AU - Dortmans, L.J.M.G.
AU - With, de, G.
PY - 2001/11/9
Y1 - 2001/11/9
N2 - Fracture of quasi - brittle ceramics is a complex field of study. This complexity arises because around the crack tip multiple processes occur influencing the behaviour of the fracture, microcracking and bridging being the most important ones. There is, therefore, a complexity in the modelling of such a fracture due to the multiplicity of parameters. A new approach is proposed: the design and construction of model materials. These materials have enlarged microstructural features that permit the control and variation of the material parameters, as particle size, force between particles, stiffness of the particles and particle stacking. In this communication, one of these model materials is presented: a porous polymer material containing a mixture of poly-methyl-methacrylate (PMMA) spheres with diameters in a range between 100 μm to 1 mm, in which microstructure can be easily changed. The fracture behaviour of this material can be described with great precision with a fictitious crack model for different environment conditions. With a computer imaging tool the deformation fields of the fracture process zone around the crack tip can be visualized and measured.
AB - Fracture of quasi - brittle ceramics is a complex field of study. This complexity arises because around the crack tip multiple processes occur influencing the behaviour of the fracture, microcracking and bridging being the most important ones. There is, therefore, a complexity in the modelling of such a fracture due to the multiplicity of parameters. A new approach is proposed: the design and construction of model materials. These materials have enlarged microstructural features that permit the control and variation of the material parameters, as particle size, force between particles, stiffness of the particles and particle stacking. In this communication, one of these model materials is presented: a porous polymer material containing a mixture of poly-methyl-methacrylate (PMMA) spheres with diameters in a range between 100 μm to 1 mm, in which microstructure can be easily changed. The fracture behaviour of this material can be described with great precision with a fictitious crack model for different environment conditions. With a computer imaging tool the deformation fields of the fracture process zone around the crack tip can be visualized and measured.
KW - Ceramics
KW - Fictitious crack
KW - Fracture
KW - Fracture process zone
KW - Model materials
KW - Numerical modelling
KW - Polymethyl methacrylate
KW - Porous materials
KW - Quasi-brittle
KW - Strain visualization
UR - https://www.scopus.com/pages/publications/0034781527
U2 - 10.4028/www.scientific.net/KEM.206-213.755
DO - 10.4028/www.scientific.net/KEM.206-213.755
M3 - Conference contribution
T3 - Key Engineering Materials
SP - 755
EP - 758
BT - Proceedings the 7th conference and exhibition of the European Ceramic Society, Brugge, Belgium, September 9 - 13, 2001, seventh ECerS / EURO Ceramics VII.
PB - Trans Tech Publications
CY - Uetikon-Zürich
T2 - 7th Conference of the European Ceramic Society
Y2 - 9 September 2001 through 13 September 2001
ER -