Publication detail
Evaluation of stress intensity factor in FGM
ŠEVČÍK, M. HUTAŘ, P. NÁHLÍK, L. KNÉSL, Z.
Czech title
Určení součinitele intenzity napětí ve FGM
English title
Evaluation of stress intensity factor in FGM
Type
abstract
Language
en
Original abstract
Functionally graded materials (FGM) are characterised by variations in their material properties in terms of their geometry. They are often used as a coating for interfacial zones to protect the basic material against thermally or mechanically induced stresses. FGM can be also produced by technological process for example butt-welding of the polymer pipes. This work is focused on a numerical estimation of the stress intensity factor for cracks propa-gating through FGM structure. The philosophy of the FE model creation is focused on the discretization of mate-rial properties. The analysis of the FGM layer bonded from both sides with different homogenous materials has been performed to study the influence of the shape of the material property change. The thickness effect of the FGM layer is also discussed. All analyses are simulated as a 2D problem of an edge crack specimen. In this pa-per, the above effects are quantified, and conclusions concerning the applicability of the proposed model are dis-cussed.
Czech abstract
Práce se zabývá studiem lomově mechanických parametrů ve funkčně gradientní vrstvě. Je zde navržen postup nerovnoměrné diskretizace mechanických vlastností materiálu za účelem zvýšení efektivnosti řešení.
English abstract
Functionally graded materials (FGM) are characterised by variations in their material properties in terms of their geometry. They are often used as a coating for interfacial zones to protect the basic material against thermally or mechanically induced stresses. FGM can be also produced by technological process for example butt-welding of the polymer pipes. This work is focused on a numerical estimation of the stress intensity factor for cracks propa-gating through FGM structure. The philosophy of the FE model creation is focused on the discretization of mate-rial properties. The analysis of the FGM layer bonded from both sides with different homogenous materials has been performed to study the influence of the shape of the material property change. The thickness effect of the FGM layer is also discussed. All analyses are simulated as a 2D problem of an edge crack specimen. In this pa-per, the above effects are quantified, and conclusions concerning the applicability of the proposed model are dis-cussed.
Keywords in Czech
funkčně gradientní materiál, lineárně elastické lomová mechanika, diskretizační postupy, mocninná změna mechanických vlastností
Keywords in English
functionally graded material, linear elastic fracture mechanics, discretization methodology, power-law material change
Released
26.10.2009
Publisher
Západočeská univerzita
Location
Plzeň
ISBN
978-80-7043-824-4
Book
Computational Mechanics 2009
Pages from–to
1–2
Pages count
2