Effect of adhesive debonding and patch materials on stress intensity factor in repaired cracked plates

Aabid, Abdul and Hrairi, Meftah and Baig, Muneer and Syed Mohamed Ali, Jaffar (2026) Effect of adhesive debonding and patch materials on stress intensity factor in repaired cracked plates. Mechanics Research Communications, 154 (NA). pp. 1-15. ISSN 0093-6413 E-ISSN 1873-3972

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Abstract

The major challenge in aerospace structures is the sensitivity of materials to failure from minor cracks caused by external loads. Therefore, researchers have extensively studied passive repair methods that use composite material patches for repairing damaged plates. This study investigates the effects of debonding and patching materials on repaired plates. The study considered center-cracked plates repaired with bonded patches using the mathematical modelling and finite element (FE) method. Mathematical modelling has been derived from a crackbridging model via Rose’s and Kim’s analytical approach, and then a simulation model was developed using the FE method, and the results of both methods were compared. The study also compares the effectiveness of isotropic and orthotropic patches, demonstrating that reinforced patches achieve greater stress intensity factor (SIF) reduction due to their uniform material properties, while composite patches are influenced by directiondependent characteristics. This investigation reveals that debonding increases the SIF by reducing the load transfer efficiency of the patch, highlighting its critical impact on repair performance. This study quantifies the reduction in patching efficiency due to debonding. The numerical results were compared with existing experimental results, and the current mathematical model showed good agreement, with <5% of relative errors.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Debonding, Crack-bridging model, Finite element method, Stress intensity factor, Patch
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA349 Mechanics of engineering. Applied mechanics T Technology > TA Engineering (General). Civil engineering (General) > TA630 Structural engineering (General) T Technology > TJ Mechanical engineering and machinery > TJ212 Control engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Dr. Meftah Hrairi
Date Deposited:	21 Jul 2026 14:07
Last Update:	21 Jul 2026 15:45
Queue Number:	2026-07-Q4045
URI:	http://irep.iium.edu.my/id/eprint/129799

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