THE SIGNIFICANCE OF MEAN STRESS ON THE FATIGUE-CRACK GROWTH THRESHOLDFOR MIXED-MODE I+II LOADING

Authors
TONG J YATES JR BROWN MW
Citation
J. Tong et al., THE SIGNIFICANCE OF MEAN STRESS ON THE FATIGUE-CRACK GROWTH THRESHOLDFOR MIXED-MODE I+II LOADING, Fatigue & fracture of engineering materials & structures, 17(7), 1994, pp. 829-838
Citations number
17
Categorie Soggetti
Material Science","Engineering, Mechanical
Journal title
Fatigue & fracture of engineering materials & structures → ACNP
ISSN journal
8756758X
Volume
17
Issue
7
Year of publication
1994
Pages
829 - 838
Database
ISI
SICI code
8756-758X(1994)17:7<829:TSOMSO>2.0.ZU;2-J
Abstract
The effect of mean stress on near threshold fatigue crack growth behav iour under mixed mode I + II loading has been studied in a structural steel BS4360 50D in laboratory air at room temperature. It was found t hat the branch crack threshold decreased significantly as R ratio (P(m in)P(max)) increased from 0.1 to 0.7. A simple model is proposed to pr edict the branch crack threshold behaviour for R-ratio sensitive mater ials. Further investigation is required to model the mode II dominant situations where the branch crack thresholds tend to converge on a hig h value.