Tensile and Water Absorption Properties of FRP Composite Laminates without Voids and with Voids

Reddy, G. Venkata; Krishna, V. Gopala; Shanker, K.

doi:10.1016/j.proeng.2016.12.195

Cited by 20 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to FEMA, water absorption properties are the most important aspects that should be seriously considered. Reddy et al [ 3 ] investigated the absorption rate of the GFRP composite at different times. The results showed a slight increase for the first 1 h, a very slow increase between 1 to 2.5 h, and finally a drastic increase between 2.5 to 4 h. The total percentage of water absorption after 4 h was 11.7%.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Water Absorption Capacity of Hybrid GFRP Composites

et al. 2022

View full text Add to dashboard Cite

Hybrid glass fibre reinforced polymer (GFRP) composites have been used for decades in various engineering applications. However, it has a drawback with its application in marine/flood environments due to a lack of water resistance and frail mechanical stability. Floods have been considered one of the most periodic hazards that could hit urban areas, due to climate change. The present paper aims to address this gap and to investigate the mechanical properties (tensile, compressive, and flexural strength) and water absorption capacity of hybrid GFRP composite comprising woven E-glass fabric and epoxy resin, various reinforcing materials (kenaf and coconut fibres), and various filler materials (fly ash, nano-silica, and calcium carbonate (CaCO3). The composites with 30 wt.% GFRP, 50 wt.% resin, 15 wt.% fly ash, 5 wt.% CaCO3, 10 wt.% GFRP, 60 wt.% resin, and 30 wt.% fly ash showed the lowest water absorption property of 0.45%. The results revealed that the GFRP composite reinforced kenaf fibres with nano-silica, fly ash, and CaCO3 improved the water absorption resistance. At the same time, GFRP reinforced the coconut fibres with fly ash, and kenaf fibres with CaCO3 showed no favourable impact on water absorption. The identification of a hybrid GFRP composite with various reinforcing materials and fillers would assist future developments with a more compatible, enhanced, and reliable water-resistant composite, specifically for structural applications in flood-prone areas.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Water Absorption Capacity of Hybrid GFRP Composites

et al. 2022

View full text Add to dashboard Cite

show abstract

“…When the specimen was cured, the gel ball reduced to a tiny size leaving the remaining size as bubbles. The size and location of bubble in the specimen was almost identical to that of gel ball before heating [29]. Gel ball with diameter of 1mm was inserted in the second layer of specimen and stay at the center of cross section.…”

Section: Specimen and Test Configurationmentioning

confidence: 99%

“…One of the practical missions of studying the evolution of bubble defects in wind turbine blade is to ascertain how the evolution of bubble defects inside the material affects the macroscopic mechanical properties of the material [25][26][27][28][29]. Besides, the ply configuration is the basis of structural design and it greatly affects the success or failure of the structural design.…”

Section: Introductionmentioning

confidence: 99%

Study on Air Bubble Defect Evolution in Wind Turbine Blade by Infrared Imaging with Rheological Theory

Zhou

Zhang

2019

Applied Sciences

View full text Add to dashboard Cite

Air bubble is a manufacturing defect that is common to composite wind turbine blades, which might evolve into cracks, leading to failure under load. The evolution and critical state of air bubble are studied to establish a condition assessment method for blade quality control. A method that is based on rheological theory is proposed to recognize the critical state by temperature jump. The air bubble is regarded as a null set and the temperature distribution of bubble defect is affected by the volumetric strain energy under tensile load. An infrared camera can detect a temperature jump when mechanical characteristics drastically change due to crack formation. A tensile fatigue test was carried out to verify the accuracy of this method. The relative error between the measured and calculated temperature rise at the critical moment was less than 7%. Additionally, the specimen with [0/90]s ply angles is more favorable to maintain the structural stability than the others. The method in this paper establishes a quantitative relationship between the meso-defect and macro mechanical properties. The defect severity of wind turbine blade can be defined by infrared imaging technology.

show abstract

“…Generally, coatings are only effective in offering short to medium-term protection against moisture [60,61]. Natural composites with a higher content of voids absorb a higher amount of moisture relative to the ones without voids [62]. Managing the manufacturing environment of natural composites such as maintaining it under vacuum and low humidity is fundamental to reduce the void content that could be created during the manufacturing process.…”

Section: J Compos Sci 2019 3 X 2 Of 40mentioning

confidence: 99%

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

Al-Maharma

Al-Huniti

2019

J. Compos. Sci.

View full text Add to dashboard Cite

Natural composites can be fabricated through reinforcing either synthetic or bio-based polymers with hydrophilic natural fibers. Ultimate moisture absorption resistance at the fiber–matrix interface can be achieved when hydrophilic natural fibers are used to reinforce biopolymers due to the high degree of compatibility between them. However, the cost of biopolymers is several times higher than that of their synthetic counterparts, which hinders their dissemination in various industries. In order to produce economically feasible natural composites, synthetic resins are frequently reinforced with hydrophilic fibers, which increases the incompatibility issues such as the creation of voids and delamination at fiber–matrix interfaces. Therefore, applying chemical and/or physical treatments to eliminate the aforementioned drawbacks is of primary importance. However, it is demonstrated through this review study that these treatments do not guarantee a sufficient improvement of the moisture absorption properties of natural composites, and the moisture treatments should be applied under the consideration of the following parameters: (i) type of hosting matrix; (ii) type of natural fiber; (iii) loading of natural fiber; (iv) the hybridization of natural fibers with mineral/synthetic counterparts; (v) implantation of nanofillers. Complete discussion about each of these parameters is developed through this study.

show abstract

Tensile and Water Absorption Properties of FRP Composite Laminates without Voids and with Voids

Cited by 20 publications

References 1 publication

Mechanical Properties and Water Absorption Capacity of Hybrid GFRP Composites

Mechanical Properties and Water Absorption Capacity of Hybrid GFRP Composites

Study on Air Bubble Defect Evolution in Wind Turbine Blade by Infrared Imaging with Rheological Theory

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

Contact Info

Product

Resources

About