Repairing impact damaged fiber reinforced composite pipes by external wrapping with composite patches

Kara, Memduh; Uyaner, Mesut; Avcı, Ahmet

doi:10.1016/j.compstruct.2014.12.017

Cited by 44 publications

(20 citation statements)

References 12 publications

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“…Various studies have been carried out to determine the impact behavior of these structures, which have changed with various interventions. Kara et al 16 investigated the impact behavior of fiber-reinforced composite pipes repaired using a composite patch. Glass fiber-reinforced composite pipes under different impact energies were subjected to impact testing and the damaged pipes were repaired with composite patches with different numbers of layers.…”

Section: Introductionmentioning

confidence: 99%

Numerical model for composite patch repair of notched aluminum plates under impact loading

Çalışkan

Ekici

Bayazit

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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The damaged area for various structures can be effectively repaired using composite materials. With the effect of impact, damage can occur that cannot be clearly seen in the inner structure of a laminated composite. This can cause delamination and other damage modes in layered composite structures. In this study, three-dimensional dynamic progressive damage analysis was performed in adhesively bonded composite patch-repaired metal notched plates under impact loads to investigate the effect of external composite patch material and thickness. Three-dimensional Hashin damage models were used for the progressive damage model. A user-defined subroutine, VUMAT was written to transfer the damage models to finite element code. By writing a separate script in Python language that relates to the damage models, the weakness in the laminate of the composite patch was transferred to the finite element model with a different degradation model proposed. It was found that plastic deformations occurring after impact damage in the notched metal plates was prevented by the use of composite patches. While glass and carbon fiber exhibit similar behavior at lower impact velocities, the progress of damage is prevented by increasing patch thickness. These behaviors were confirmed by the numerical model and showed an advanced agreement with experimental results.

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Section: Introductionmentioning

confidence: 99%

Numerical model for composite patch repair of notched aluminum plates under impact loading

Çalışkan

Ekici

Bayazit

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…They found that the boron‐epoxy composite patches showed a positive life improvement for 7050 and 7085 aluminum in salt water. Kara and his coworkers studied the effect of layer numbers of fiber in composite patches on the repair of fiber‐reinforced composite pipe damaged by low velocity impact, and the results showed that the six‐layered patches repairing was suitable. Besides, the research of Bouiadjra et al further compared the repaired effect of composite patches and metallic patches on the damaged location of aircraft structures, and they revealed the repair effect of the composite patches was better than that of the metallic patches when there was no significant moisture absorption phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of UV‐curable carbon fiber‐reinforced polymer composite patch: Repair evaluation of damaged aluminum alloy

Liu

2019

Polymers for Advanced Techs

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Epoxy resin composite patches reinforced by carbon fiber were prepared through ultraviolet (UV)-curing method, and the damaged aluminum alloy plates are rapidly repaired by means of adhesively bonding method. Mechanical properties of the composite patches and damaged aluminum alloy plates before and after repair were studied by experiment and numerical simulation. Results indicated that the tensile properties of carbon fiber/epoxy resin composite patches presented the tendency of first increase and then decrease with the increase of layer numbers of reinforced fiber. The composite patches with two layers fiber showed the best tensile properties, and the tensile strength and modulus reached 1.13 GPa and 27.79 GPa, respectively. However, the bending strength of composite patches decreased with the increase of layer numbers. Results of performance evaluation on the mechanical properties of damaged aluminum alloy plates repaired by the two layers carbon fiber/epoxy resin composite patches showed that the repair efficiency of tensile and bending properties of the repaired aluminum alloys reached more than 83% and 160%, respectively, compared with the undamaged aluminum alloys. Besides, results of numerical simulation showed that the stress intensity factor (SIF) of the crack tip on repaired aluminum alloy plates decreased significantly in comparison with the unrepaired aluminum alloy plates, which further revealing the reinforced mechanism of composite patches on the bending properties of repaired aluminum alloy plates. KEYWORDS finite element analysis (FEA), mechanical properties, polymer composite patches, repair materials, ultraviolet light curing 1 | INTRODUCTION The aluminum alloys are widely used in aerospace, automobile, ships, machinery manufacturing, and chemical industry because of the low density, high specific strength, and good thermal and electric conductivity. 1 Since aluminum alloy structures are unavoidably exposed to repetitive loads or humid environment frequently during its service life, the corrosion or fatigue damage generates easily on the aluminum alloy structures under the electrochemical effect. Therefore, it is urgent to rapidly and effectively repair the mechanical properties of the cracked aluminum alloy structures.Traditional methods of repair normally consist of riveting an additional reinforcement onto the damaged area. For the repair of metal structures, the hot-driven rivets have been extensively used from the end of 18th century. However, the hot riveting process also induces high stress concentrations in the metallic plates and makes the riveted connections become weak. 2 Hence, with the development of materials technology, it is necessary to find a more effective repair

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“…Kara ve diğ. [19] yapmış oldukları tamir çalışmasında kompozit yamaların tabaka sayısının etkilerini araştırmışlar ve boru cidar kalınlığının önemli bir faktör olduğunu tespit etmişlerdir. Günümüz yapıştırma teknolojileri, hasara uğramış boruların minimum bir maliyetle onarılmasına imkân tanımaktadır.…”

Section: Introductionunclassified

Effects of patch material on the adhesive in the repair of damaged pipes

Çitil¹

2017

Pamukkale J Eng Sci

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Repairing impact damaged fiber reinforced composite pipes by external wrapping with composite patches

Cited by 44 publications

References 12 publications

Numerical model for composite patch repair of notched aluminum plates under impact loading

Numerical model for composite patch repair of notched aluminum plates under impact loading

Mechanical properties of UV‐curable carbon fiber‐reinforced polymer composite patch: Repair evaluation of damaged aluminum alloy

Effects of patch material on the adhesive in the repair of damaged pipes

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