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In this paper, an experimental technique to determine the stress intensity factor (SIF) KI for a three-dimensional crack front using the caustic method in combination with the stress-freezing and stress-releasing techniques is proposed. A comparison between the experimental results determined by the proposed method and the traditional photoelastic method is made; in addition, the experimental results...
Conclusion The test system is suitable to perform both the open-loop and closed-loop tests for the ceramic material even when system noise exists. However, when there is very little displacement to be measured, the noise becomes a problem. Based on the previous measurement and analysis of system noise, further improvement of the testing system can be made by increasing the system’s stiffness and fixing...
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