The K-COD relationship for compact tension specimen

✍ Scribed by S.A. Paranjpe; S. Banerjee

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 378 KB
• Volume: 10
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(78)90067-x

✦ Synopsis

ln this paper a K-COD (8) relationship proposed in the case of single edge notched tension (SENT) specimens is applied to the compact tension (CT) specimen. According to this relationship, K-8 is a linear relationship dependent on specimen dimensions and al W ratio. The effect of specimen width and al W ratio can be taken into account by plotting K vs 8x/a! W instead of K-& K vs 8x/al W is an unique relationship independent of the specimen width and al W ratio. However 8 is defined here as the resultant displacement at the crack tip obtained by joining the notch mouth opening displacement to strain reversal point. In the linear elastic and small yielding situations, the strain reversal point position is different from the apparent rotation axis position as obtained by the crack profile extrapolation. This analysis is further validated by comparing the results of this analysis with the published experimental results on CT specimens.