Elastic compliance of single-edge-notched tension SE(T) (or SENT) specimens

• Main Authors: B. Tyson, P. Ding, X. Wang
• Format: Article
• Language: English
• Published: Gruppo Italiano Frattura 2014-09-01
• Series: Frattura ed Integrità Strutturale
• Subjects: SENT
• Online Access: https://www.fracturae.com/index.php/fis/article/view/1292

There has been a trend recently to use specimen geometries for toughness measurement that are more representative of actual flaw geometries in service. A prominent example is the use of single-edge-notched tension specimens for assessment of surface flaws in pipelines. To obtain a resistance (R) curve, i.e. J-integral or CTOD as a function of crack growth, it is necessary to monitor the crack size as a function of J or CTOD. To facilitate obtaining these data from a single specimen, the elastic CMOD unloading compliance C has been used in several testing programs to estimate crack size. C is a function of several variables in addition to crack size – notably, specimen constraint (plane stress or plane strain). In this paper, the dependence of C on these variables will be discussed.