Usage of the small-punch-test for the characterisation of reactor vessel steels in the brittle–ductile transition region
作者： T. Linse , M. Kuna , J. Schuhknecht , H.-W. Viehrig
DOI: 10.1016/J.ENGFRACMECH.2007.03.047
关键词: Strain hardening exponent 、 Reactor pressure vessel 、 Finite element method 、 Structural engineering 、 Tensile testing 、 Material properties 、 Composite material 、 Brittleness 、 Hardening (metallurgy) 、 Engineering 、 Ultimate tensile strength
摘要: Abstract This paper presents a method for the identification of hardening parameters and W eibull -parameters in brittle brittle–ductile transition region. A small-punch-test device is developed hot cells, where miniaturised disk-like specimen manufactured deformed by spherical punch until failure. Its load–displacement-curve analysed regarding its information about material behaviour. Using neural networks, an routine developed, which avoids time-consuming calculations with FEM during optimisation algorithm. Identified properties are compared data from tensile tests. identified parameters, calculated temperatures at cleavage fracture occurs.
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