Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 32, Issue 11, Pages 1843-1852Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2010.05.005
Keywords
Fatigue striations; Fatigue crack growth; Metals and alloys; Plastic deformation; Modeling
Funding
- US Department of Energy, Office of Energy Efficiency and Renewable Energy
- Division of Scientific User Facilities, Office of Basic Energy Sciences, US Department of Energy
Ask authors/readers for more resources
The fatigue crack growth process involves damage accumulation and crack extension. The two sub-processes that lead to fatigue crack extension were quantified separately in a recent model for small fatigue crack growth applicable to engineering alloys. Here, we report the results of an experimental investigation to assess the assumptions of that model. The fatigue striation formation in an aluminum alloy is modeled, and it is verified that the number of cycles required for striation formation is related to the cyclic crack-tip opening displacement. The striation spacing is related to the value of the monotonic crack-tip displacement. It is concluded that extensive crack-tip geometry changes due to plasticity in the aluminum alloy causes a reduction in the slope of the fatigue crack propagation curves. The implications of these results on the fatigue crack propagation lifetime calculations are identified. (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available