21-108 STUDIUL VITEZEI DE CREŞTERE A FISURII ÎN RAPORT CU MODELUL MATEMATIC PROPUS
STUDY OF SPEED INCREASE OF THE CRACK
IN RELATION TO MATHEMATICAL MODEL PROPOSED
It has been carried out a study of the crack propagation rate in testpieces
with flat model CT, with side notch, from a 10TiNiCr175 mark stainless,
by three known variants: polynomial method according to ASTM 647-95, Paris
method and Forman method. It was examined the influence of temperature
variation to low values, for an axial cyclic eccentric strain. Asymmetry coefficient
by working was R = 0,3, and the temperatures T = 293 K, T = 253 K,
respectively T = 213 K.
Cuvinte cheie: solicitare ciclică, coeficient de asimetrie, fisură, viteză
de fisurare, factor de intensitate a tensiunii
Keywords: application cyclical asymmetry coefficient, crack, crack
speed, voltage intensity factor