Volume 22, Issue 3 (March 2022)
Modares Mechanical Engineering 2022, 22(3): 201-211 |
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Shiri K, Eftekhari Shahri S E, Rastegari Kupaii H. Experimental Study of the Effects of Rectangular and H-Shaped Woven Nanocomposites Patch on tensile properties of Repaired AL5251 Sheets. Modares Mechanical Engineering 2022; 22 (3) :201-211
URL: http://mme.modares.ac.ir/article-15-53373-en.html
URL: http://mme.modares.ac.ir/article-15-53373-en.html
1- Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran
2- Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran ,e.eftekhari@birjandut.ac.ir
3- Department of Metallurgy Engineering, Islamic Azad University, Kerman, Iran
2- Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran ,
3- Department of Metallurgy Engineering, Islamic Azad University, Kerman, Iran
Abstract: (1742 Views)
Crack nucleation and propagation in engineering segments and structures are unavoidable. Replacing a damaged part is the easiest way to prevent failure, but it is not always cost-effective. Therefore, in many cases, by repairing a component, the life of defective working parts can be increased. One of the effective strategies, is mending the cracked area using composite patches witch are glued in crack formation place. The purpose of this study was to investigate the effect of patch on crack growth behavior as well as the effects of patch geometry on the mechanical properties of repaired Al5251 aluminum alloy. For this purpose, a Kevlar-epoxy composite patch with rectangular and H-shaped geometry has been used. Tensile test was performed to evaluate the mechanical properties and the crack growth behavior in the samples. The influences of patch geometry and effective area on tensile force, specimen ductility, toughness and crack forming force have been investigated. The results showed that with the use of composite patch, ductility, force at the moment of cracking and the failure force increased compared to samples without repair. Also, comparison of patches with equal effective area showed that samples repaired with H-shaped patch have more load capacity than rectangular patch. In addition, the amount of toughness in the sample repaired with H-shaped patch has increased.
Keywords: 5251 Aluminum Alloy, Sample Repairing, Composite Patch, Patch Geometry, Tensile properties
Article Type: Original Research |
Subject:
Analysis & Selection of Materials
Received: 2021/06/17 | Accepted: 2021/09/4 | Published: 2022/01/30
Received: 2021/06/17 | Accepted: 2021/09/4 | Published: 2022/01/30
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