Energy absorption of repaired composite laminates subjected to impact loading

Balaganesan, G.; Khan, Vishwas Chandra

doi:10.1016/j.compositesb.2016.04.083

Cited by 40 publications

(17 citation statements)

References 27 publications

(25 reference statements)

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“…Recently, researchers have started studying the post impact performance of repaired glass fibre/epoxy composite laminates. Balaganesan and Chandra Khan (2016) conducted medium velocity impact on repaired glass/epoxy composite laminates and found that the experimental results were in good agreement with the numerical results. They concluded that repaired laminates absorbed 80% of the energy absorbed by the undamaged specimen during impact loading.…”

Section: Introductionsupporting

confidence: 56%

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Numerical Study On Multi Layered Target Material Subjected To Impact Loading

Khan

Veldanda

Balaganesan

et al. 2018

Lat. Am. j. solids struct.

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In this study, the glass/epoxy composite laminate is layered with polyurethane foam/ polyurethane sheet and silicon carbide to analyse their response during high mass and low velocity impact. The silicon carbide is layered in two forms, one is as plate and the other is as inserts. The target materials are prepared in various combinations and the bonding of layers is done by using epoxy. Effectiveness of silicon carbide inserts and plates are compared in terms of their energy absorbing capacities. The numerical simulation is also carried for the target material with the same experimental conditions. The experimental results are compared with the numerical results for validation and a reasonably good agreement is found. Further, the validated numerical model is extended to understand the ballistic performance of the target material. It is observed that the introduction of silicon carbide as front layer improves both the structural and ballistic performance. Also, the damage in case of samples with silicon carbide inserts is localized as opposed to that of silicon carbide plate.

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Section: Introductionsupporting

confidence: 56%

“…The properties of GFRP laminates are enlisted in the table 1 (Balaganesan and Chandra Khan, 2016). Glass fibres and resin are not separately modelled and the main phenomena of relevance are accounted for in an orthotropic model.…”

Section: Materials Propertiesmentioning

confidence: 99%

Numerical Study On Multi Layered Target Material Subjected To Impact Loading

Khan

Veldanda

Balaganesan

et al. 2018

Lat. Am. j. solids struct.

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show abstract

“…Visual inspection technique is one of the primary methods to identify the damage produced after an impact test. Researchers have used visual inspection to evaluate low-velocity damage and determine the damage type [15,16,17,18]. Low-velocity impact on repaired composite laminates can be identified through visual examination [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Residual Tensile Strength of the Multi-Impacted Scarf-Repaired Glass Fiber-Reinforced Polymer (GFRP) Composites

2018

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The effect of multiple/repeated impacts on a repaired composite was investigated using a low-velocity impact test. The composite samples were fabricated through a vacuum resin infusion method (VARI) and repaired by a scarf repair technique. Later, a repeated low-velocity impact test was performed on the original and repaired composites samples. Performance of the multi-impacted repaired and original samples was evaluated and compared by measuring maximum contact force, maximum displacement, maximum time duration, absorbed energy and damage area. Photographs of the post-impacted samples were taken to observe the multi-impact damage progression through visual inspection. The results showed that each repeated impact subjected the samples to more damage. Tensile tests revealed that the scarf repair restored 81.23% strength. It was also observed that the sample obtained the highest damage dent in the low-velocity impact test that failed early during a tensile test and carried the lowest ultimate load.

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“…Over the last decade, a large number of experimental, analytical and numerical studies on the mechanical performance of nonferrous light metals and composite structures repaired with composite patches have been presented. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Liu et al 13 reported a study on the tensile behavior of open-hole composite plates bonded with external composite patches. They also developed a 3-D progressive damage model and investigated the effects of different repair parameters on the ultimate strength and failure mechanism of the repaired structures.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on low velocity impact behavior of thermoplastic composites repaired by composite patches

Zorer

Özdemir

Öztoprak

2020

Journal of Composite Materials

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In this study, low velocity impact behavior of E-glass fiber-reinforced thermoplastic composites repaired by pressing external laminated composite patches was investigated by experimental methods. Thermoplastic composites were manufactured from polypropylene granules with two different fiber contents of 40 wt. % and 60 wt. %. Repaired specimens were prepared by using unidirectional E-glass reinforced polypropylene based thermoplastic prepregs. In order to compare the low velocity impact behavior of the repaired and unrepaired specimens, a number of single impact tests (ranging from energy levels of 10 J to 50 J) were carried out through a drop weight impact test machine with a hemispherical impactor. Low-velocity impact response of the specimens was investigated with cross-examining contact force-deformation curves and damaged specimens. Impact damages occurred in the upside and bottom surfaces of the composites were recorded from the visual inspection and compared for repaired and unrepaired specimens. According to experimental results, bending stiffness and maximum contact force of the specimens having fiber content of 60 wt.% are higher than those of 40 wt.%. Moreover, it was concluded that the patch repaired specimens have achieved a better performance in terms of maximum contact force and absorbed energy compared to the intact specimens.

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Energy absorption of repaired composite laminates subjected to impact loading

Cited by 40 publications

References 27 publications

Numerical Study On Multi Layered Target Material Subjected To Impact Loading

Numerical Study On Multi Layered Target Material Subjected To Impact Loading

Residual Tensile Strength of the Multi-Impacted Scarf-Repaired Glass Fiber-Reinforced Polymer (GFRP) Composites

An experimental study on low velocity impact behavior of thermoplastic composites repaired by composite patches

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