000003880 001__ 3880
000003880 005__ 20141118153343.0
000003880 04107 $$acze
000003880 046__ $$k2009-05-11
000003880 100__ $$aFrydrýšek, K.
000003880 24500 $$aStochastic model and reliability assesment applied for the platinum ore disintegration process

000003880 24630 $$n15.$$pEngineering Mechanics 2009
000003880 260__ $$bInstitute of Theoretical and Applied Mechanics AS CR, v.v.i., Prague
000003880 506__ $$arestricted
000003880 520__ $$2eng$$aThis paper focuses on a numerical analysis of the hard rock (ore) disintegration process. The bit moves into the ore (i.e. mechanical contact with friction) and subsequently disintegrates it. The disintegration (i.e. stress-strain relationship, reaction forces and fracture of the ore etc.) is solved via the FEM in combination with SBRA (Simulation-Based Reliability Assessment) Method (i.e. Monte Carlo simulations). The ore is disintegrated by deactivating the FE which satisfy the fracture condition. Material of the ore (i.e. yield stress, fracture limit, etc.), is given by bounded histograms (i.e. stochastic inputs). The results are compared with experiments. Application of the SBRA method in this area is a new and innovative trend. However, it takes a long time to solve this problem (due to material and structural nonlinearities, the large number of elements, many Monte Carlo simulations, etc.). Hence, parallel computers were used to handle the large computational needs. Finally, the probabilistic reliability assessment is proposed.

000003880 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003880 653__ $$a

000003880 7112_ $$aEngineering Mechanics 2009$$cSvratka (CZ)$$d2009-05-11 / 2009-05-14$$gEM2009
000003880 720__ $$aFrydrýšek, K.$$iMarek, P.
000003880 8560_ $$ffischerc@itam.cas.cz
000003880 8564_ $$s941694$$uhttps://invenio.itam.cas.cz/record/3880/files/Frydrysek-281-PT.pdf$$y
             Original version of the author's contribution as presented on CD, 281.
            
000003880 962__ $$r3852
000003880 980__ $$aPAPER