Fatigue crack propagation in Ti-6Al-4V subjected to high strain amplitudes
Författare
Summary, in English
Fatigue crack propagation in circular Ti-6Al-4V specimens subjected to high strain amplitudes has been investigated. Crack closure was measured with an electrical potential-drop technique. Closure was shown not to depend on strain ratio but to be a function of the applied strain range. At higher strain ranges, the crack was found to be closed for a smaller part of the load cycle than at lower strain ranges due to blunting of the crack tip. Furthermore, the use of a strain-intensity approach to predict crack-propagation rate was investigated, and it was found that for the upper parts of the da/dN curves the effective strain intensity yields good predictions. Also, the effective stress-intensity factor was found to collapse the da/dN curves for different load ratios.
Avdelning/ar
Publiceringsår
2005
Språk
Engelska
Sidor
301-308
Publikation/Tidskrift/Serie
Fatigue & Fracture of Engineering Materials & Structures
Volym
28
Issue
3
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Wiley-Blackwell
Ämne
- Applied Mechanics
- Materials Engineering
Nyckelord
- crack propagation
- fatigue
- crack closure
- strain-intensity factor
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1460-2695