On the calibration of the electrical potential technique for monitoring crack growth using finite element methods

✍ Scribed by R. O. Ritchie; K. J. Bathe

• Publisher: Springer Netherlands
• Year: 1979
• Tongue: English
• Weight: 443 KB
• Volume: 15
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00115908

✦ Synopsis

Finite element analysis procedures are utilized to provide theoretical calibration curves for the electrical potential crack-monitoring system as applied to single-edge-notch (SEN) and compact tension (CT) fracture specimens. The results are compared to existing calibrations for such test piece geometries derived using experimental, electrical analog and analytical (conformal mapping) procedures. * Such factors include the electrical stability and resolution of the potential measurement system [23], electrical contact between crack surfaces where the fracture morphology is rough [22] or where significant crack closure effects are present [11], and changes in electrical resistivity with plastic deformation [23].