Method for the evaluation of mode I fatigue crack growth rate of prestrained materials

✍ Scribed by Takuhiro Mishima; Minwoo Kang; Yuuta Aono; Hiroshi Noguchi

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 852 KB
• Volume: 29
• Category: Article
• ISSN: 0142-1123
• DOI: 10.1016/j.ijfatigue.2007.02.001

✦ Synopsis

The fatigue crack growth rate dl/dN characteristics of prestrained carbon steel were studied. In this study, the relationship between the ultimate tensile strength r B of prestrained specimens and dl/dN was the focus. Under the conditions of large-scale yielding, there is a correlation between dl/dN and r B where dl/dN versus r n a l characteristics are modified by r B , regardless of the degree of prestrain. Under the conditions of small-scale yielding, although r B affects dl/dN, r B does not correlate strongly with dl/dN in comparison with the case under the conditions of large-scale yielding.