Reinforcement of the F-111 wing pivot fitting with a boron/epoxy doubler system—materials engineering aspects

Baker, A.A.; Chester, R.; Davis, MJ; Roberts, J.D.; Retchford, J. A.

doi:10.1016/0010-4361(93)90021-y

Cited by 35 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fortunately as exemplified by the doubler modifications adopted following an early F-111 failure the use of a thin interleaf adhesive, in this particular instance a 0.025 mm thick layer of FM300-2, between the 1 st and the 2 nd plies, can be used to both toughen the matrix material and also reduce the local interlaminar stresses and thereby largely overcome this failure mechanism, see [13,25] for more details. As such the use of a thin interleaf layer between the 1 st and 2 nd plies of the composite doubler is recommended for all composite repairs.…”

Section: First Ply Failurementioning

confidence: 99%

Composite repairs to bridge steels demystified

Ali

Raman

Zhao

et al. 2017

Composite Structures

View full text Add to dashboard Cite

Section: First Ply Failurementioning

confidence: 99%

Composite repairs to bridge steels demystified

Ali

Raman

Zhao

et al. 2017

Composite Structures

View full text Add to dashboard Cite

“…By curing, the resin hardens and bonds the fibres to the damaged surface permanently and the resulting composite material patch reinstates the damaged material's strength and provides water tightness; see Figures 2 and 3 for more information. This kind of composite repairs entered the service in aviation industry more than 30 years ago and were functionally used for crack repairs [2] and structural reinforcements [3]. The recent overview [4], among mentioned functionalities, also showed that the composite repairs are very cost effective.…”

Section: Figure 1: Frequent Problems Of Corrosion and Cracks On Various Positions On Different Vesselsmentioning

confidence: 99%

Study of Tube And Tank Specimens Repaired Using a Carbon Fibre Reinforced Epoxy

Frank¹,

Milat²,

Balunović³

et al. 2020

JMTS

View full text Add to dashboard Cite

Merchant and passenger ships operate in harsh environments where they constantly suffer from corrosion and crack problems. The traditional cutting and welding of the steel parts most often requires redirection of a vessel to a shipyard what results in substantial vessel out-of-service time. In such situations, a ship operator seeks an efficient and fast repair solution to minimise ship delays. Following advancements in research and application of composite materials, an opportunity to implement composite patches made of carbon fibres and epoxy resin has emerged in the shipping industry as one of the cost and time efficient repair solutions. Although, the resin hardens and bonds the fibres strongly to the damaged surface, classification societies still consider this repair as a temporary solution and accept it conditionally, meaning with the frequent obligatory inspections. This is because there hasn’t been enough practical evidence yet to recognise the composite patching as the permanent repair solution. In order to further investigate the efficiency of the composite patching, this paper presents the finite element (FE) strength investigation of 17 patches applied to tube and tank specimens under water pressure. The future work will consider a validation of the obtained FE results by means of pressure testing during the course of the qualification process.

show abstract

“…This is similar to the value of 96 J m P 2 measured for the grit-blast specimen as shown in Figure 5. A yield stress calculation [21] indicates that the 3.2 mm thick A1-2024 T3 aluminium alloy adherends are just at the threshold of plastic deformation when tested with FM-73 adhesive (Glc-= 2 kJm-' [33,34]) under dry conditions and is well below this threshold when the adhesive bond is degraded by moisture. The use of a thin 1.5mm wedge, inserted slowly in a press, also decreases the initial cantilever …”

Section: Fracture Toughness In Humid Environmentsmentioning

confidence: 99%

The Influence of Adherend Topography on the Fracture Toughness of Aluminium-Epoxy Adhesive Joints in Humid Environments

Rider

Arnott

2001

The Journal of Adhesion

View full text Add to dashboard Cite

The adherend surface topography has ;I dramatic effect on the durability of structural bonds formed between aluminium and an epoxy adhesive. Systematic changes in the micro-roughness of an aluminium adherend were achieved using an ultra-milling technique to prepare surfaces with topographies ranging from ultra-flat to a sawtooth profile with a base angle of approximately 60' and a peak-to-valley depth of 10 pm. The fracture toughness of double-cantilever beam specimens, stressed in the Mode I direction and exposed to a humid environment was found to change by a Factor of approximatcly one hundred as the sawtooth profile angle was increased. These changes in fracture toughness may be accounted for through complex interrelationships between moisture diffusion and interphase mechanical properties. each with a strong dependence on the surface micro-topography. k'e~w~ordv: Surrace roughness: Fracture toughness: Bond durability: Aluminium: Epoxy adhesive

show abstract

Reinforcement of the F-111 wing pivot fitting with a boron/epoxy doubler system—materials engineering aspects

Cited by 35 publications

References 6 publications

Composite repairs to bridge steels demystified

Composite repairs to bridge steels demystified

Study of Tube And Tank Specimens Repaired Using a Carbon Fibre Reinforced Epoxy

The Influence of Adherend Topography on the Fracture Toughness of Aluminium-Epoxy Adhesive Joints in Humid Environments

Contact Info

Product

Resources

About