000009255 001__ 9255
000009255 005__ 20141204092422.0
000009255 04107 $$aeng
000009255 046__ $$k12/05/2014
000009255 100__ $$aKeršner, Z.
000009255 24500 $$aEvaluation of wedge-splitting test results from quasi-brittle prismatic specimens using the double-K fracture model

000009255 24630 $$n18.$$pEngineering Mechanics 2012
000009255 260__ $$bInstitute of Theoretical and Applied Mechanics, AS CR, Prague
000009255 506__ $$arestricted
000009255 520__ $$2eng$$aThe fracture-mechanical parameter values of concrete, a quasi-brittle composite material, are determined from records of experiments on specimens with stress concentrators. One of the fracture models applicable to concrete is the double-K model. This model combines the concept of cohesive forces acting on the effective crack increment with a criterion based on the stress intensity factor. The outputs of the model are critical crack tip opening displacement and fracture toughness values, including the initiation stress intensity factor value corresponding to the beginning of stable crack propagation. In this paper, a method of calculation by means of the double-K fracture model is verified using published data and the results of a pilot wedge-splitting test performed by the authors.

000009255 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009255 653__ $$adouble-K fracture model, concrete, prismatic specimen, wedge-splitting test

000009255 7112_ $$aEngineering Mechanics 2012$$cSvratka (CZ)$$d12/05/2014 - 15/05/2014$$gEM2012
000009255 720__ $$aHavlíková, I.$$iPail, T.$$iVeselý, V.$$iVořechovská, D.$$iKeršner, Z.
000009255 8560_ $$ffischerc@itam.cas.cz
000009255 8564_ $$s601641$$uhttps://invenio.itam.cas.cz/record/9255/files/225_Kersner_Z-FT.pdf$$yOriginal version of the author's contribution as presented on CD, poster (No. 225).
000009255 962__ $$r8924
000009255 980__ $$aPAPER