Buckling Strength Assessment of Composite Patch Repair Used for the Rehabilitation of Corroded Marine Plates
Abstract
:1. Introduction
- Water, scale, dirt, or oil remainings due to poor drainage or design flaw.
- High stresses applied to the subject area.
- Coating breakdown usually caused by poor maintenance and the ship’s age.
- Operation in a corrosive enabling environment, such as near high-temperature regions (e.g., heated fuel tanks).
2. Design Basis
3. Optimal Design Method
3.1. Design of the Repair
3.2. Theoretical Background
- P is the axial acting force.is the balance moment, with , and .
- and .
- and are the effective plane stress Young’s moduli of the composite and the plate respectively, while Ec and Em are their Young’s moduli of elasticity, and νc and νm their Poisson’s ratio.
4. Physics and Data-Based Models
4.1. FEA Model
4.2. DoE Analysis
5. Case Study
5.1. Problem Set-Up
5.2. Analysis Results
6. Concluding Remarks
Author Contributions
Funding
Conflicts of Interest
References
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Property | Steel Grade ‘AH32′ 1 | CFRP 2,3 | GFRP 3 |
---|---|---|---|
Young’s modulus of elasticity | 206 GPa | 42.95 GPa | 213.4 GPa |
Poisson’s ratio | 0.3 | 0.3 | 0.3 |
Yield/Fracture Stress | 315 MPa | 352 MPa | 549 MPa |
Plate’s Property | Symbol | Value | Unit |
---|---|---|---|
Material | - | Grade ‘AH32’ Steel | - |
Length | am | 2250 | mm |
Width | bm | 900 | mm |
Intact thickness | tm,intact | 20 | mm |
Corrosion | - | 5 | % |
Corroded thickness | tm,corroded | 19 | mm |
FoS requirement | FoSreq | 1.0 | - |
Patch’s Property | Options | x | y |
---|---|---|---|
Material | CFRP/GFRP | No. Plies | FoS |
Configuration | One-Sided/Two-Sided | ||
Shape | Rectangular/Ellipsoid/Octagonal |
Factor | Name | Low Level (−) | Center (0) | High Level (+) |
---|---|---|---|---|
x1 | Coverage (c) | 40% | 70% | 100% |
x2 | No. Plies (Nplies) | 4 | 18 | 32 |
Factor | Name | D + E 1 | E 2 | D + E 1 | E 2 | D + E 1 |
---|---|---|---|---|---|---|
x1 | Coverage (c) | 40% | 55% | 70% | 85% | 100% |
x2 | No. Plies (Nplies) | 4 | 11 | 18 | 25 | 32 |
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Kallitsis, N.; Anyfantis, K.N. Buckling Strength Assessment of Composite Patch Repair Used for the Rehabilitation of Corroded Marine Plates. Appl. Mech. 2021, 2, 482-500. https://doi.org/10.3390/applmech2030027
Kallitsis N, Anyfantis KN. Buckling Strength Assessment of Composite Patch Repair Used for the Rehabilitation of Corroded Marine Plates. Applied Mechanics. 2021; 2(3):482-500. https://doi.org/10.3390/applmech2030027
Chicago/Turabian StyleKallitsis, Nikos, and Konstantinos N. Anyfantis. 2021. "Buckling Strength Assessment of Composite Patch Repair Used for the Rehabilitation of Corroded Marine Plates" Applied Mechanics 2, no. 3: 482-500. https://doi.org/10.3390/applmech2030027
APA StyleKallitsis, N., & Anyfantis, K. N. (2021). Buckling Strength Assessment of Composite Patch Repair Used for the Rehabilitation of Corroded Marine Plates. Applied Mechanics, 2(3), 482-500. https://doi.org/10.3390/applmech2030027