Abstract
Structural Health Monitoring has become a significant issue in numerous engineering fields and industries. Early detection of damage such as cracks, as well as their depth and location, could be a major research topic. In this research, the natural frequency of a cylindrical solid shapes iron bar together with two half-circle surface crack has been investigated by Finite Element Method (FEM). Vibration Analysis has been used to predict response and different crack depths are the main parameters for analysis to access structural integrity performance of the domain. It is found that lowest frequency of intact bar was higher than the lowest frequency of the cracked bar, and frequencies decreased as the crack depth increased. Using this method very small sizes crack (minimum 0.05 mm) can be defined in any structural body.
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