[33574] Artykuł: Catalogue of the J-Q trajectories for CC(T) and SEN(T) specimens in tensionCzasopismo: Central European Journal of Engineering Tom: 1, Zeszyt: 3, Strony: 257-278ISSN: 1896-1541 Opublikowano: 2011 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Pozostałe publikacje (niepunktowane) Punkty MNiSW: 0  Pełny tekst |
In this paper a short theoretical background about elastic-plastic fracture mechanics is presented and the O’Dowd-Shih theory is discussed. Using FEM, the values of the Q-stress determined for various elastic-plastic materials for two specimens in tension — SEN(T) specimen and CC(T) specimen are presented. The influence of geometry of the specimen, crack length and material properties (work-hardening exponent and yield stress) on the Q-parameter are tested. The numerical results were approximated by closed form formulas. The results are summarized in a catalogue of the Q-stress value, which may be used in engineering analysis for calculation of the real fracture toughness and the stress distribution near crack tip.
