Home > Search Results: keywords:"weld overlay"
Search:
Search Tips :: Advanced Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Computational Modelling of Welding and Heat Treatment Process of Steel with Application of Elastic-Viscoplastic Material Model
 Jarý, Milan ; Daněk, Ladislav (referee) ; Dymáček, Petr (referee) ; Junek, Lubomír (advisor)
This dissertation thesis deals with the improvement of computational approaches for prediction of residual stresses in welded joints of welded structures in order to ensure greater compliance of the calculated results with the real conditions of welding and heat treatment. The improvement of computational approaches is based on application of elastic-viscoplastic material models which are able (compared with elastic-plastic material models) to take into account the viscoplastic processes ongoing during welding and heat treatment. This leads to more accurate calculated results which enter into further assessment of limit states and directly decide on the safety and lifetime of welded structures. Performed computational and experimental works, confronted with results published in the world, confirm the influence and benefit of application of elastic-viscoplastic material models in the frame of welding and heat treatment numerical analyses. Therefore elastic-viscoplastic material model is further applied in solution of practical project solved by IAM Brno. Solution of this project, whose aim is the development of repair of dissimilar metal welds (without post-weld heat treatment) in Dukovany and Temelin nuclear power plants using "Weld overlay method", has confirmed that application of elastic-viscoplastic material model leads to more accurate calculated results. For this reason the elastic-viscoplastic computational approach will be included into all future tasks of IAM Brno.
Detailed record
Introductory research into failures of dissimilar metal welds of nuclear power plants components and a method of WOL-type repair welds
 Štefan, Jan
This research report was elaborated for the State Office for Nuclear Safety of the Czech Republic as a document providing information on the cladding of Weld Overlay (WOL) type. WOL is a technology used to repair dissimilar metal welds of various components of nuclear power plants affected by stress corrosion cracking (SCC). The first objective of this report is provision of a research into basics of the problems being discussed. The second objective is the assessment of suitability of WOL cladding as a repair technology for real dissimilar metal welds in Dukovany nuclear power plant.
Detailed record
Computational Modelling of Welding and Heat Treatment Process of Steel with Application of Elastic-Viscoplastic Material Model
 Jarý, Milan ; Daněk, Ladislav (referee) ; Dymáček, Petr (referee) ; Junek, Lubomír (advisor)
This dissertation thesis deals with the improvement of computational approaches for prediction of residual stresses in welded joints of welded structures in order to ensure greater compliance of the calculated results with the real conditions of welding and heat treatment. The improvement of computational approaches is based on application of elastic-viscoplastic material models which are able (compared with elastic-plastic material models) to take into account the viscoplastic processes ongoing during welding and heat treatment. This leads to more accurate calculated results which enter into further assessment of limit states and directly decide on the safety and lifetime of welded structures. Performed computational and experimental works, confronted with results published in the world, confirm the influence and benefit of application of elastic-viscoplastic material models in the frame of welding and heat treatment numerical analyses. Therefore elastic-viscoplastic material model is further applied in solution of practical project solved by IAM Brno. Solution of this project, whose aim is the development of repair of dissimilar metal welds (without post-weld heat treatment) in Dukovany and Temelin nuclear power plants using "Weld overlay method", has confirmed that application of elastic-viscoplastic material model leads to more accurate calculated results. For this reason the elastic-viscoplastic computational approach will be included into all future tasks of IAM Brno.
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English