The Structural Integrity of Composite Materials and Long-Life Implementation of Composite Structures

Beaumont, Peter W. R.

doi:10.1007/s10443-020-09822-6

Cited by 26 publications

(9 citation statements)

References 26 publications

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“…For all sorts of operational conditions, detailed information about crack initiation points, mechanical behavior of material and sustainable structural integrity across a wide spectrum of the size scale are required. Thus empirical or semi‐empirical design methodologies at a structural level can only be supported and justified by microscopic size scale by physical modelling 37 . Since the strength of the component depends on the strength of the weakest location.…”

Section: Challenges Associated With Composite Component Design With Holementioning

confidence: 99%

“…Thus empirical or semi-empirical design methodologies at a structural level can only be supported and justified by microscopic size scale by physical modelling. 37 Since the strength of the component depends on the strength of the weakest location. In the case of a composite component with a hole, the location around the hole is the weakest.…”

Section: Challenges Associated With Composite Component Design With Holementioning

confidence: 99%

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An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

Gupta

Pal

Ray

2023

J of Applied Polymer Sci

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Aerospace and aircraft companies follow a pyramidal structure of testing, ranging from specimen tests to full-scale structure tests, for aircraft structural design. At the base level, open hole strength evaluation is one of the qualification procedures for composite components. The holes are made in the structural components to accommodate bolts and rivets in order to assemble the parts into a single unit. Holes in the component are also used to fulfill functional requirements, such as the passage of wire bundles. FRP components are sensitive to these holes/cutouts as substantial decrement in the strength is observed in several experiments. The degradation in the strength of the component is due to stress concentration around the hole. This review aims to comprehend the effect of the hole on the mechanical properties of FRP laminates; the emphasis is mainly on CFRP laminates and experimental results. An overview of tensile, compressive, flexural and post buckling properties of laminates with the hole is presented to aid in the optimal design of the component. Finally, the failure mechanism during loading is discussed and described through a graphical presentation.

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Section: Challenges Associated With Composite Component Design With Holementioning

confidence: 99%

Section: Challenges Associated With Composite Component Design With Holementioning

confidence: 99%

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

Gupta

Pal

Ray

2023

J of Applied Polymer Sci

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“…Facecore interfacial debonding is a critical issue that causes the failure of sandwich structures 6,7 ; this is because debonding at the adhered regions between the facesheets and the core may occur due to manufacturing flaws or in-service damage. [8][9][10][11] Debonded regions can lead to crack growth, strength and stiffness reduction, and failure. The flexural rigidity, stiffness and strength reductions are more significant for a longer debonded region.…”

Section: Introductionmentioning

confidence: 99%

Vibration behaviours of multi-debonded sandwich beams with symmetric angle-ply facesheets

Tsai

2023

Journal of Composite Materials

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Sandwich beams, comprising two stiff facesheets bonded to a core, are light and strong and see widespread application. However, debonded regions between the facesheets and the core can significantly reduce the strength and have an impact on the vibration behaviour. In this study, the previous literature was referred to, and finite element simulations were conducted using ANSYS on debonded sandwich beams with [0°]4, [+45°/−45°]S and [90°]4 carbon fibre reinforced polymer facesheets. The effects of the configurations of the three debonded regions and facesheet stacking orientations were studied. The most important finding is that if debonds cover vibration nodes, the natural frequencies drop more significantly because the stiffness decreases more. It was determined that when there were debonded regions, the natural frequencies of the bending modes of the beams using [0°]4 facesheets decreased more compared to those of the beams using [+45°/−45°]S and [90°]4 facesheets; while the trends are opposite for the natural frequencies of torsion modes of the beams using [+45°/−45°]S facesheets. Reducing the natural frequency can cause a structure to vibrate at the resonance frequency, leading to structural failure. This study contributes to furthering our understanding of how different debonds and facesheet stacking orientations affect the vibrations of sandwich beams.

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“…As a result, the fibre, matrix, and interface are the three main components of the composite [25]. To optimize the coupling between the two phases and therefore allow stresses to be dispersed over the matrix and hence transferred to the reinforcement, the interface between the fibre and the matrix must have sufficient chemical and physical bonding stability [26].…”

Section: Introductionmentioning

confidence: 99%

An Optimized Neuro-Bee Algorithm Approach to Predict the FRP-Concrete Bond Strength of RC Beams

et al. 2022

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Over the world, there is growing worry about the corrosion of reinforced concrete structures. Structure repair, rehabilitation, replacement, and new structures all require cost-effective and long-lasting technologies. Fiber Reinforced Polymer (FRP) has been widely employed in both retrofitting existing structures and building new ones. Due to its varied qualities in reinforced concrete and masonry constructions as a repair composite material, FRP have seen a rise in use over the last decade. This material have several advantages such as high stiffness-to-weight and strength-to-weight ratios, light weight, possibly high longevity, and relative ease of usage in the field. Among all the parameters the bond between concrete and FRP composite play an important role in the strengthening of structures. However, the bond behaviour of the FRP-concrete interface is complex, with several failure modes, making the bond strength difficult to forecast, resulting in the FRP strengthened concrete structure. To overcome such kind of issues machine learning models are sufficient to forecast the bond strength of FRP-concrete. In this article Artificial Neural Network (ANN), optimized Artificial Bee Colony (ABC)-ANN and Gaussian Process Regression (GPR) algorithms are deployed to predict the bond strength. The R-value of ABC-ANN and GPR models are 0.9514 and 0.9618 respectively. This research aids researchers in estimating bond strength in less time, at a lower cost, and with less experimental work.INDEX TERMS ABC-ANN, ANN, Bond strength, FRP-concrete bond, FRP, Machine leaning.

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The Structural Integrity of Composite Materials and Long-Life Implementation of Composite Structures

Cited by 26 publications

References 26 publications

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

Vibration behaviours of multi-debonded sandwich beams with symmetric angle-ply facesheets

An Optimized Neuro-Bee Algorithm Approach to Predict the FRP-Concrete Bond Strength of RC Beams

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