INVESTIGADORES
DIAZ Felipe Victor
artículos
Título:
Nondestructive evaluation of the fatigue damage accumulation process around a notch using a digital image measurement system
Autor/es:
DÍAZ, F.V.; ARMAS, A.F.; KAUFMANN, G.H.; GALIZZI, G.E.
Revista:
OPTICS AND LASERS IN ENGINEERING
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2004 vol. 41 p. 477 - 487
ISSN:
0143-8166
Resumen:
The fatigue damage accumulation process around a notch is studied using a noncontact digital image measurement system. This system incorporates a contrast correlation method to evaluate the level of plastic damage at each point of the studied area of the specimen from two images acquired before and after the introduction of fatigue deformation. A compact tension specimen of 304 stainless steel with a notch radius of 1mm is analyzed during the first 1000 cycles of the crack growth stage. During this period, the externally given work not only impels the crack growth and its local plastic zone but also generates plastic damage around the notch. The obtained results are used to explain the behavior of cracks emanating from notches.
