Effect of post-cure temperature and different reinforcements in adhesive bonded repair for damaged glass/epoxy composites under multiple quasi-static indentation loading

Andrew, J. Jefferson; Arumugam, V.; Santulli, Carlo

doi:10.1016/j.compstruct.2015.10.037

Cited by 42 publications

(21 citation statements)

References 42 publications

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“…When the composites were fabricated using homogeneous chopped fiber reinforcements (Type C), the damage profile also changed; fiber breakage was less observed unlike Type W samples, or fiber/matrix debonding or fiber pull‐out was much less noticed unlike Type GC‐I and Type GC‐S samples. Instead, more matrix cracking could be observed that propagated along various directions owing to the random orientation of chopped fibers . In specific, the tensile properties of Type C samples could be described in terms of the characteristics of the constituents and the various energy absorbing mechanisms.…”

Section: Resultsmentioning

confidence: 99%

“…Unlike composites with continuous plain weave woven fabrics which are more prone to delamination under transverse impact load, composites with chopped fibers are randomly oriented in the through‐the‐thickness direction. The randomly oriented chopped fibers act as a resisting source and restrict the progression of primary cracks by converting them into secondary cracks . Despite these advantages, chopped fibers are vulnerable to damage caused by rear face tensile stress and front face compression stress under transverse impact loads .…”

Section: Introductionmentioning

confidence: 99%

“…The randomly oriented chopped fibers act as a resisting source and restrict the progression of primary cracks by converting them into secondary cracks . Despite these advantages, chopped fibers are vulnerable to damage caused by rear face tensile stress and front face compression stress under transverse impact loads . Significant attention has been paid in tailoring the configuration of fiber architectures so that high‐performance composite laminates that can withstand transverse impact loads can be fabricated .…”

Section: Introductionmentioning

confidence: 99%

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Effect of multiphase fiber system and stacking sequence on low‐velocity impact and residual tensile behavior of glass/epoxy composite laminates

2018

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This article investigates the effect of multiphase fiber system based on plain weave woven fabrics and chopped short fibers in glass/epoxy composite laminates on low‐velocity drop weight impact and quasi‐static tensile after impact (TAI) behaviors. In this regard, glass/epoxy composites with two stacking sequences (intercalated and sandwich‐like lay‐ups) were tested and compared with homogeneous standard composites fabricated with either only woven or only chopped fibers. In all the samples with multiphase fiber system, the amount of woven and chopped glass fibers were equal (4 layers and 3 layers, respectively), while stacking sequences were different. This enabled us to investigate the associated influences of fiber architecture and stacking sequence on low‐velocity drop weight impact and TAI behavior of the glass/epoxy composite laminates. All the glass/epoxy samples were impacted at four various impact energy levels, particularly 2, 4, 6, and 8 J. Results depicted that fiber architecture and stacking sequence played a vital role in low‐velocity drop weight impact and TAI behavior (i.e., damage degree, absorbed energy, peak contact force, residual deformation, residual tensile strength, displacement to ultimate failure, and failure profile) of the glass/epoxy samples. The results depicted that the sandwich‐like lay‐up configuration presented superior impact properties and damage tolerance capabilities at low impact energies (up to 4 J). On the contrary, intercalated lay‐up arrangement suited better to withstand widespread damage generated by higher impact energy levels (6 and 8 J), because they enabled a more efficient redistribution of low‐velocity impact damage in the composite. POLYM. COMPOS., 40:1450–1462, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of multiphase fiber system and stacking sequence on low‐velocity impact and residual tensile behavior of glass/epoxy composite laminates

2018

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“…Before starting with the repair process, the damaged area of the glass/epoxy specimens was wiped using acetone solution to avoid the presence of contaminants and debris from cutting operation (as per standard ASTM D2093) after the water‐jet machining process. An epoxy adhesive reinforced with chopped fibers (in a ratio 1:1 by weight) was selected to fill the dressed region, as they showed superior resistance to crack propagation . During the repair process, the surplus resin spread around the repair site over the parent laminate was cleaned using cotton immersed in an acetone solution.…”

Section: Methodsmentioning

confidence: 99%

Effect of patch hybridization on the compression behavior of patch repaired glass/epoxy composite laminates using acoustic emission monitoring

Andrew

Arumugam

2016

Polymer Composites

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This article investigates the compressive response of damaged glass/epoxy composite laminates repaired using hybrid external patches. Hybrid external patches based on glass and Kevlar woven fabrics bonded on both faces of the damaged parent laminate were considered. Five different kinds of plain weave woven fabrics with a different ratio between glass and Kevlar fibers (100/0, 75/25, 50/50, 25/75, and 0/100) were used as the external patches. The intention of using these hybrid patches is to build up a patch of optimum stiffness that facilitate to restrict the critical adhesive or cohesive failure on the joints unlike high stiff glass fibers or extensive fiber micro‐buckling of the external patches unlike low stiff Kevlar fibers under compression loading and consequently to produce repaired laminates with a strain to failure and residual strength nearly close or similar as that of virgin or normal components. The virgin and damaged specimens were taken as the reference specimens for comparison of residual mechanical properties and damage mechanisms. Damage evolution and the failure progression of the repaired glass/epoxy specimens were monitored using real‐time Acoustic Emission (AE) monitoring technique. Specimens repaired with the equal volume fraction of glass and Kevlar fibers in the external patches presented the most favorable residual compressive response by effectively releasing the stress concentration in the damaged area. POLYM. COMPOS., 39:1922–1935, 2018. © 2016 Society of Plastics Engineers

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“…One of the main processes of an epoxy matrix composite's production is the post‐curing process. However, only a few studies have been performed on the effect of the post‐curing conditions, focusing mostly on the process temperature . Hemmatian et al applied a gravitational search algorithm and elitist ant system to solve the multi‐objective optimization of carbon/glass fiber hybrid composites in order to achieve designs with minimum weight and cost.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimization of post‐curing process for GNPs reinforced glass fabric/epoxy nanocomposite laminae

et al. 2018

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Post‐curing processes are fundamental manufacturing operations for epoxy matrix composites from which high‐quality parts are produced and see service in a great variety of industrial applications. Although many parameters affect these processes, only temperature is considered as affecting factor in most of the relevant studies. In this study, a multi‐parameter design of experiments, using Taguchi method, has been conducted in order to investigate the optimum post‐curing conditions for graphene nanoplatelets reinforced glass fabric/epoxy nanocomposite laminae. Both post‐curing temperature Tpc and time tpc were treated as independent variables in a L9 Taguchi orthogonal array addressing three levels each. Ultimate tensile strength and strain at break were examined as pre‐selected quality objectives. Through the multiple regression analysis performed, a highly accurate regression model was achieved for both optimization criteria. Finally, a multi‐objective optimization genetic algorithm was used for the above models. POLYM. COMPOS., 39:E2483–E2489, 2018. © 2018 Society of Plastics Engineers

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Effect of post-cure temperature and different reinforcements in adhesive bonded repair for damaged glass/epoxy composites under multiple quasi-static indentation loading

Cited by 42 publications

References 42 publications

Effect of multiphase fiber system and stacking sequence on low‐velocity impact and residual tensile behavior of glass/epoxy composite laminates

Effect of multiphase fiber system and stacking sequence on low‐velocity impact and residual tensile behavior of glass/epoxy composite laminates

Effect of patch hybridization on the compression behavior of patch repaired glass/epoxy composite laminates using acoustic emission monitoring

Multi‐objective optimization of post‐curing process for GNPs reinforced glass fabric/epoxy nanocomposite laminae

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