NDLI: Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

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Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

Content Provider	MDPI
Author	Yousefi, Armin Jolaiy, Saman Hedayati, Reza Serjouei, Ahmad Bodaghi, Mahdi
Copyright Year	2021
Description	Bonded patches are widely used in several industry sectors for repairing damaged plates, cracks in metallic structures, and reinforcement of damaged structures. Composite patches have optimal properties such as high strength-to-weight ratio, easiness in being applied, and high flexibility. Due to recent rapid growth in the aerospace industry, analyses of adhesively bonded patches applicable to repairing cracked structures have become of great significance. In the present study, the fatigue behavior of the aluminum alloy, repaired by a double-sided glass/epoxy composite patch, is studied numerically. More specifically, the effect of applying a double-sided composite patch on the fatigue life improvement of a damaged aluminum 6061-T6 is analyzed. 3D finite element numerical modeling is performed to analyze the fatigue performance of both repaired and unrepaired aluminum plates using the Abaqus package. To determine the fatigue life of the aluminum 6061-T6 plate, first, the hysteresis loop is determined, and afterward, the plastic strain amplitude is calculated. Finally, by using the Coffin-Manson equation, fatigue life is predicted and validated against the available experimental data from the literature. Results reveal that composite patches increase the fatigue life of cracked structures significantly, ranging from 55% to 100% for different applied stresses.
Starting Page	1421
e-ISSN	19961944
DOI	10.3390/ma14061421
Journal	Materials
Issue Number	6
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-03-15
Access Restriction	Open
Subject Keyword	Materials Manufacturing Engineering Characterization and Testing of Materials Aluminum 6061-t6 Composite Patch Finite Element Modeling Plasticity Fatigue Life
Content Type	Text
Resource Type	Article

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