INVESTIGADORES
CHAPETTI mirco Daniel
artículos
Título:
Two Small-Crack Extension Force Concept Applied to Fatigue Limit of Blunt Notched Components
Autor/es:
CHAPETTI, MD; KITANO, T; TAGAWA, T; MIYATA, T
Revista:
INTERNATIONAL JOURNAL OF FATIGUE
Editorial:
Elsevier Ltd.
Referencias:
Año: 1999 vol. 21 p. 77 - 82
ISSN:
0142-1123
Resumen:
The fatigue limit of blunt notched components is analyzed here from an energetic point of view. A total crack extension force is estimated by using both, the local extension force, related with the surface strain concentration phenomena, and the external extension force given by the applied stress intensity factor. This concept is used to analyze the fatigue limit and the ocurrency of non-propagating cracks in notched specimens of ferrite steel. The analyzes show that the local crack estension force can only explain the ocurrency of microstructurally short non-propagating cracks, that is to say, it plays an important role in defining the microstructural threshold that defines the fatigue limit of blunt notched components.
