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Enhancement of the micro mechanical basis for local approach cleavage models

: Hardenacke, V.; Hohe, J.; Friedmann, V.; Siegele, D.


Alber, H.-D.:
83rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM). Special issue : March 26-30, 2012, Darmstadt, Germany
Weinheim: Wiley-VCH, 2012 (Proceedings in applied mathematics and mechanics 12.2012, Nr.1)
International Association of Applied Mathematics and Mechanics (GAMM Annual Meeting) <83, 2012, Darmstadt>
Conference Paper, Journal Article
Fraunhofer IWM ()
cleavage fracture; ferritic steel; probabilistic model

The present study is concerned with the investigation of the micro mechanisms of micro defect nucleation in bainitic steels in order to provide an enhanced basis for probabilistic cleavage models. By a micro mechanical modelling of the cleavage initiation process the effects and the interactions of the relevant parameters can be identified. For this purpose Representative Volume Elements (RVE) of the micro structure are utilised, accounting for both, the grain structure as well as the brittle particles at the grain boundaries. The RVE's are loaded based on the local mechanical field quantities determined numerically at the cleavage origins of different fracture mechanics