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Actuators 2018, 7(2), 25; https://doi.org/10.3390/act7020025

Evaluating the Reduction of Stress Intensity Factor in Center-Cracked Plates Using Piezoelectric Actuators

1
Department of Aeronautical Engineering, Sudan University of Science and Technology, Street 61, Khartoum 11111, Sudan
2
Department of Mechanical Engineering, International Islamic University Malaysia, P.O. Box 10, 50728 Kuala Lumpur, Malaysia
*
Author to whom correspondence should be addressed.
Received: 22 February 2018 / Revised: 18 May 2018 / Accepted: 25 May 2018 / Published: 27 May 2018
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Abstract

Active repairs using smart materials such as piezoelectric actuators can play a significant role in reducing the crack damage propagation in engineering structures. This study analytically and numerically investigated the active repair of center-cracked plates using piezoelectric actuators. First, the stress intensity factor (SIF) for a center-cracked plate due to stress produced by a piezoelectric actuator is analytically modeled. This analytical model is obtained by applying the method of weight functions. In the second step, the solution is found for the center-cracked plate due to external loading from known linear elastic fracture mechanics. These solutions are then superimposed, taking into account the superposition principle to yield the total stress intensity factor for the integrated piezoelectric actuator to the center-cracked plate. Finally, the proposed theoretical model is verified by finite element simulation. The results indicated that the relative errors of the analytical model and the FEA results are less than 5% in all the cases studied in this paper. View Full-Text
Keywords: piezoelectric actuator; fracture mechanics; active repair; stress intensity factor piezoelectric actuator; fracture mechanics; active repair; stress intensity factor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Abuzaid, A.; Hrairi, M.; Dawood, M.S.I.B.S. Evaluating the Reduction of Stress Intensity Factor in Center-Cracked Plates Using Piezoelectric Actuators. Actuators 2018, 7, 25.

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