Publikacje

Abstract:

The results of experimental and numerical analyses concerning the failure mechanisms of
S355JR steel are presented. Tests were performed on S355JR steel after three heat treatments at three
different temperatures with five specimen geometries that were designed to provide different
values of the stress triaxiality and Lode parameter as well as different critical strains and stresses at
the onset of final failure. Depending on the test temperature and specimen geometry, cleavage or
ductile fracture were observed; the latter occurred either by the void nucleation–growth–
coalescence process or by the shear mechanism. The locations where the observed mechanism
started were localized, and mechanical fields were computed in these domains. The critical effective
plastic strains were determined as functions of the stress triaxiality and Lode parameter in the case
of ductile fracture, and the critical opening stresses were determined as functions of the Lode
parameter and effective plastic strains in the case of cleavage fracture.

POWRÓT

Strona główna > Publikacje

The experimental-numerical analyses of the failure mechanisms of S355JR steel