Study of crack tip opening under cyclic loading taking into account the environment and R ratio

✍ Scribed by A. Clerivet; C. Bathias

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 958 KB
• Volume: 12
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(79)90100-0

✦ Synopsis

This study involves the R effect and environment effect on crack closure mode, in 7175 T 651 aluminium alloy. To obtain one of the selected objectives, it was necessary to use a clip gauge located at the notch of the compact specimen and a C.T.O.D. gauge located at the crack tip. The crack opening phenomena observed in our tests depends on the applied method which accounts for the differences in A& found in the literature. The systematic use of the two methods allowed us to bring to light common features permitting the calculation of A&e according to Elber's criteria. The concept of A&e does not fully explain the influence of R ratio and the environment effect.