Fatigue crack prediction in ceramic material and its porous media by using peridynamics

Tien Nguyen, Cong and Oterkus, Selda and Oterkus, Erkan and Amin, Islam and Ozdemir, Murat and El-Aassar, Abdel-Hameed and Shawky, Hosam (2023) Fatigue crack prediction in ceramic material and its porous media by using peridynamics. Procedia Structural Integrity, 46. pp. 80-86. ISSN 2452-3216 (https://doi.org/10.1016/j.prostr.2023.06.014)

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Abstract

Peridynamics is a nonlocal reformulation of the classical continuum mechanics using integro-differential equations. Since the integro-differential equations used in peridynamics are valid in both continuous and discontinuous models, the theory is suitable for predicting progressive damages. In this study, fatigue crack growth in a ceramic material and its porous media is predicted by using the peridynamic model for fatigue cracking. First, the fatigue crack propagation in compact specimen of a non-porous ceramic material is considered. The predicted fatigue crack growth rate is compared with experimental results. Next, the fatigue crack growths in ceramic material with different porosity levels are investigated. The fatigue crack growth rate of porous materials is compared with the non-porous material to analyse the effects of porosity on fatigue crack growth. A linear relation between the relative change of fatigue crack growth rate, stress intensity factor range and porosity level is obtained by using linear regression analysis.

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