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Although the designed specimen is not adapted to study fatigue crack propagation, it provides a simple way to study the crack initiation an...
The results show the potential of the setup to measure crack length, crack tip opening and nominal stress.
Application of the method to a specimen with a real fatigue crack shows a systematical error possibly due to the inclined crack profile.
Numerical and experimental crack identification can successfully identify the crack by locating its tips.
This approach is proposed as a temporary measure to prevent further propagation of the crack before repair of the crack can be done.
The authors identify high applied stress levels in combination with potential multiple crack initiation as the probable root of the problem and propose a scheme how the model can be extended for taking into account crack initiation.
The test results suggest a linear relationship between the crack tortuosity and the degree of crack orientation.
Also, this model for the crack spacing can be utilized to predict the value of crack width for various loading stages.
Thus, the present test can be used to check the validity of predicting the crack susceptibility based on the crack susceptibility index.

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