000003702 001__ 3702
000003702 005__ 20141118153350.0
000003702 04107 $$acze
000003702 046__ $$k2013-05-13
000003702 100__ $$aStratil, L.
000003702 24500 $$aA CALIBRATION OF GURON-TVERGAARD-NEEDLEMAN MICROMECHANICAL MODEL OF DUCTILE FRACTURE

000003702 24630 $$n19.$$pEngineering Mechanics 2013
000003702 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Praha
000003702 506__ $$arestricted
000003702 520__ $$2eng$$aFracture mechanics characteristics of ductile fracture often depend on geometry and size of specimens. A micromechanical modelling of material damage proposes a tool for treatment of geometry and size effects in fracture mechanics. Application of micromechanical model for certain material requires a calibration of model‘s parameters. This contribution presents the calibration procedure of Gurson-Tvergaard-Needleman model of ductile fracture for Eurofer97 steel. The identification of ductile damage of the steel and its tensile properties at various level of stress triaxiality by testing smooth and notched bars were determined in the previous study. The calibration procedure was performed by hybrid method as a combination of FEA simulations of tensile tests and fractography analyses. The Gurson-Tvergaard-Needleman model performance is greatly influenced by true stress-true strain curve of the material. It was verified that derivation of true stress-true strain curve of the material by using of multiple linear regression model proposed by Mirone is very suitable.

000003702 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003702 653__ $$aductile fracture, GTN model, void nucleation, MLR model, Eurofer97

000003702 7112_ $$aEngineering Mechanics 2013$$cSvratka (CZ)$$d2013-05-13 / 2013-05-16$$gEM2013
000003702 720__ $$aStratil, L.$$iDlouhý, I.$$iŠiška, F.$$iHadraba, H.
000003702 8560_ $$ffischerc@itam.cas.cz
000003702 8564_ $$s460480$$uhttps://invenio.itam.cas.cz/record/3702/files/110_Stratil_L-FT.pdf$$y
             Original version of the author's contribution as presented on CD, FRA.
            
000003702 962__ $$r3632
000003702 980__ $$aPAPER