Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.00 vteřin. 
Design Against Brittle of Elastic-Plastic Fracture of Nuclear Waste Container
Pluvinage, G. ; Lenkey, G. B. ; Dlouhý, Ivo
Design against brittle or elastic plastic fracture of nuclear waste container is discussed based on three different concepts:(i)reserve of ductility defined by means of reference temperature,(ii)deterministic design using linear or elasto-plastic fracture mechanics associated with reserve factors,and (iii)probabilistic design associated with RCC-MR failure assessment diagram. Cast ferritic steel predetermined for containers of spent nuclear fuel has been used in experimental part of the study.Fracture toughness characteristics necessary for considerations have been obtained by standard 1T three point bend specimens tested statically at different temperatures.Pre-cracked Charpy type specimen has been also employed for the investigations tested statically and dynamically.Material properties necessary for the concept presented are corresponding Master Curve and Weibull distribution of fracture toughness.Special attention has been paid to dynamic loading.Large scatter in reserve factor was found depending on the selected failure assessment method for fracture toughness characteristics changing the value from 1.44 to 4.55.
Transferability of Fracture Mechnaical Characteristics
Dlouhý, Ivo ; Lenkey, G. B. ; Pluvinage, G.
Comprehensive review of proved recent methods for transfer of fracture mechanical characteristics from smaller to standard specimen geometry is supplied thinking at the same time on transferability of these characteristics from laboratory experiments to real components. Application procedures for local approach, master curve methodology, toughness scaling models, dynamic fracture properties and notch sensitivity are workout and discussed.

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