ISSN: 0090-3973
Published Online: 12 March 2009
Page Count: 9

Development and Preliminary Testing of a Crack Detection Sensor for Crack Velocity Measurement of an Edge-Notched Disk

Hsieh, Chi-Tai
Ph.D. Candidate,Department of Resources Engineering, National Cheng Kung University,

Wang, Chein-Lee
Associate Professor,Department of Resources Engineering, National Cheng Kung University,

Wang, Shih-Hui
Ph.D. Candidate,Department of Resources Engineering, National Cheng Kung University,

(Received 10 August 2008; accepted 10 February 2009)

Abstract

In the present study, a crack velocity measuring system is developed based on the electrical method. The proposed crack velocity measuring system and an available crack gage system were attached on opposite sides of an edge-notched granite disk specimen to measure the velocity of crack propagation on each side of the surface crack. Three sensing materials were assessed for their applicability in crack detection. It was found that the sensing materials have a strong effect on the measurement of the crack velocity. Several observations on crack propagation and some aspects of the proposed measuring technique are discussed in this study.

Keywords:
crack gage, crack detection sensor, crack velocity, edge-notched disk

Paper ID: JTE102071
DOI: 10.1520/JTE102071
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