Journal ArticleDOI
Fracture Toughness and Shear Strength of the Bonded Interface Between an Aluminium Alloy Skin and a FRP Patch
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In this article, the fracture properties such as critical energy release rate in mode I (GIc) and mode II (GIIc) of an interface between two sheets of same material were modified to determine these properties between the sheets of dissimilar materials and thickness.Abstract:
The existing techniques to determine the fracture properties such as critical energy release rate in mode I (GIc) and mode II (GIIc) of an interface between two sheets of same material were modified to determine these properties between the sheets of dissimilar materials and thickness. In addition, the interface shear strength (ISS) was also determined. Experiments were carried out on the specimens made of a pre-cracked thin aluminium alloy skin and a Fiber reinforced polymer (FRP) patch. Two kinds of surface preparation of the aluminium skin were employed; (i) emery-paper roughened surface (ERS) and (ii) Sodium Hydroxide (NaOH) treated surface (NTS). GIc of ERS specimen was found to be 36.1 J/m2, while it was found to be much higher for NTS specimens, that is, 87.3 J/m2. GIIc was found to be 282.4 J/m2 for ERS specimens and much higher as 734.5 J/m2 for NTS specimens. ISS was determined as 32.6 MPa for ERS specimen and significantly higher for NTS specimen, that is, 44.5 MPa. The micrographs obtained from a field emission-scanning electron microscope (FE-SEM) and the surface roughness test showed that the NTS was significantly rougher than the ERS, explaining the higher values of all the three kinds of NTS specimens.read more
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Computational modeling of impact failure of polymer coatings
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Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches.
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Large deformation delamination in polymer coatings: Discontinuous Galerkin/cohesive zone modeling
TL;DR: In this article , a discontinuous Galerkin/cohesive zone model (DG/CZM) is proposed for large deformation delamination in automotive coatings that are a multi-layered polymer composite structure.
Journal ArticleDOI
Fatigue Analysis of Pre-cracked Aluminium Alloy Thin Sheets Repaired with a CFRP Patch at Elevated Temperature
TL;DR: In this article, the effect of fatigue life was studied at an elevated temperature of 80°C of a center pre-cracked specimen of aluminium alloy 6061-T6, repaired with a unidirectional carbon fibre-reinforced plastic (CFRP) patch.
An overview of different retrofitting methods for arresting cracks in steel structures
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References
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Physically based failure models and criteria for laminated fibre-reinforced composites with emphasis on fibre kinking. Part II: FE implementation
TL;DR: In this article, a 3D failure criteria for laminated fiber-reinforced composites, based on a physical model for each failure mode and considering non-linear matrix shear behavior, are developed.
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Convergence of strain energy release rate components for Edge-Delaminated composite laminates
TL;DR: In this article, the problem of edge delamination at the -35/90 interfaces of an 8-ply composite laminate subjected to uniform axial strain was studied and the results showed that the imaginary part of the singularity is the cause of the nonconvergent behavior of the individual components.
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The fracture properties of a fibre–metal laminate based on magnesium alloy
TL;DR: In this paper, a range of fibre-metal laminates based on a lightweight magnesium alloy have been manufactured and tested, and two types of composite reinforcement have been investigated, a woven carbon fibre reinforced epoxy and a unidirectional glass fibre reinforced polypropylene.
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Strategies for the replacement of chromic acid anodising for the structural bonding of aluminium alloys
TL;DR: In this paper, a number of modifications to the standard boric-sulphuric acid anodising (BSAA) process were proposed to achieve satisfactory structural bond performance.