Simulation of the effect of a crack on the free vibration of a rectangular plate using the finite element method
Subject Areas : Application of soft computing in engineering sciences
Ahmad Haghani
1
,
ُSoleyman Esmaeil zadeh
2
1 - Department of Mechanics, Faculty of Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
2 - M.Sc in Mechanical Engineering, Faculty of Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
Keywords: Free Vibration, Crack, Natural frequency,
Abstract :
Today, sheet metals are extensively utilized in various industries as one of the most crucial components. The presence of a crack in a structural element reduces local stiffness and consequently weakens the structure's resistance. Any change in local stiffness affects modal parameters such as natural frequencies, mode shapes, and structural damping. One of the most common issues in structural health monitoring is identifying the severity and location of potential cracks. Continuous evaluation is essential to ensure the proper functioning of many structures. This study presents an engineering perspective on the influence of cracks on vibration frequencies considering crack dimensions and locations. Finite element simulations, a widely accepted computational tool, were employed for this investigation. After verifying the convergence of the solution method, the simulation results were compared with those found in other sources, showing good agreement. Finally, the effect of crack angle and position on the natural frequencies of the system was analyzed.
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