STRESS FIELD AND INTENSITY FACTOR IN A CRACKED STRIP UNDER DYNAMIC LOADING

Khemais HAMROUNI, Abdessattar ALOUI, Tahar FAKHFAKH, Mohamed HADDAR

Unit of Mechanic, Modelisation and Production (U2MP) National School of Engineers of Sfax, BP. W. 3038 Sfax Tunisia e-mail : mohamed.haddar@enis.rnu.tn
ABSTRACT
In the present paper, we have considered a cracked strip subjected to a sinusoidal loading perpendicular to its plane. Based on Kirchhoff theory, we have developed the analytical solution of a strip’s dynamic vibration behavior, which allowed the determination of the stress field near the crack tip. A mode I of loading near the crack tip has, thus, been established. The dynamic stress intensity factor KI(z,t) associated to mode I crack opening has been described. In order to validate the analytical results, we have used a Finite Element Analysis (FEA) package (ABAQUS©) to treat an example of a 1 m x 0.2 m strip with a thickness of 1 cm having a middle crack of 10 cm in length. The results have shown significant agreements between analytical and FEA findings. Keywords: strip, crack, dynamic loading, dynamic stress intensity factor, finite element
KEYWORDS



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