Hybrid Effects of Carbon-Glass FRP Sheets in Combination with or without Concrete Beams

Kang, Thomas H.‐K.; Kim, Woosuk; Ha, Sang-Su; Choi, Dong-Uk

doi:10.1007/s40069-013-0061-0

Cited by 25 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the other hand, Cross Ply 1 and Cross Ply 4 recorded tensile modulus which is consistent with the theoretical rule of mixture. The same phenomena apply to Cross-Ply 3 and Cross Ply 2, where both depicted quite close value of tensile strength and their tensile modulus also observed to follow the rule of mixture [19]. journal.ump.edu.my/ijame ◄…”

Section: Tensile Behaviour Of Hybrid Composite Balanced Cross-ply Andsupporting

confidence: 63%

Characterisation of Hybrid Carbon Glass Fiber Reinforced Polymer (C/GFRP) of Balanced Cross Ply and Quasi Isotropic under Tensile and Flexural Loading

Ghani

Mahmud

2020

IJAME

View full text Add to dashboard Cite

Carbon fibres(CF), having a low elongation at break (approximately 2%) leads to the brittle fracture of its composites. In the hybridisation coming from the use of two or more types of fibres reinforced the same resin, the disadvantages of one type fibres can be balanced by the advantages of the others [1]. It also provides recommendations for experimental measurements of the hybrid effect, which is a synergetic increase of the failure strain of low elongation fibres when hybridised with higher elongation fibres. This implies that the carbon fibres (CF) has a very low strain to failure and is regarded as a disadvantage for the use of carbon fibre reinforced polymers (CFRP) when utilised as structural members that will be subjected to tensile, compressive, shear and or/flexural loading. On the other hand, glass fibres (GF) which have much lower strength than carbon fibres but are tougher due to higher strain-to-failure. It has been proved that incorporation of GF into CF is possible to improve the failure strain of CFRP, turning the materials to a combination system called hybrids [2] [3]. Apart from the toughness issue, CF are also very expensive which is regarded as the main drawback why CFRP are only popular in aero industries and automotive sector where weight saving is considered to be the primary concern [3]. GF are cheaper than CF and the glass fibre reinforced polymers (GFRP) have been increasingly used to replace steel in automotive industry. The use of CFRP could yield a 40-60% weight reduction; but its adoption rate still remains low. The hybridisation of GF into CF selectively could be an effective way to reduce vehicle weight without excessive cost [4]. Tensile and Flexural Behaviour of Hybrid Composite MaterialFibre-hybrid composites are attracting an ever-increasing interest from academia and industry. It is therefore vital to develop a solid understanding of their basic mechanical properties. Measuring and predicting the tensile failure of hybrid composites however remains a challenging task. Several scholars provide recommendations for experimental measurements of the hybrid effect, which is a synergetic increase of the failure strain of low elongation fibres when hybridised with higher elongation fibres. The hybridisation may also result in the improvement of composites mechanical properties characterised by the increase of ultimate tensile strain compared with those of low elongation non-hybrid fibre reinforced composites [2][5][6] [5]. Like most materials, fibre reinforced polymers (FRP) face the strength versus toughness dilemma. For example, in the case of carbon fibre (CF) being well known for having superior strength and stiffness; but these high strength and stiffness come at the expense of its low toughness. Relative glass/carbon ratios significantly influence the flexural properties, and laminate geometry further optimises them. Utilisation of hybridisation ABSTRACT -This study is performed to characterize composite material of hybrid carbon glass reinforced polymer (C/GFRP) of two (2) t...

show abstract

Section: Tensile Behaviour Of Hybrid Composite Balanced Cross-ply Andsupporting

confidence: 63%

Characterisation of Hybrid Carbon Glass Fiber Reinforced Polymer (C/GFRP) of Balanced Cross Ply and Quasi Isotropic under Tensile and Flexural Loading

Ghani

Mahmud

2020

IJAME

View full text Add to dashboard Cite

show abstract

“…In civil engineering context there are already several examples of applying the hybrid composite concept, mainly in the research and development of three main systems: (i) reinforcing bars for reinforced concrete (RC) structures [30][31][32][33][34][35][36][37]; (ii) externally bonded strengthening for RC structures [17,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52], and (iii) pultruded profiles for new structures [53][54][55]. In a general way, experimental results have shown that a significant ductile response, similar or even better, than that of a steel-reinforced concrete member can be achieved with hybrid composites [31,36].…”

Section: Introductionmentioning

confidence: 99%

Hybrid effect and pseudo-ductile behaviour of unidirectional interlayer hybrid FRP composites for civil engineering applications

Ribeiro

Sena-Cruz

Branco

et al. 2018

Construction and Building Materials

View full text Add to dashboard Cite

An experimental study on the tensile stress-strain curves of interlayer (layer-by-layer) unidirectional hybrid FRP composites was conducted aiming at evaluating the corresponding hybrid effect and pseudo-ductility of this innovative solution. Different combinations of the following dry unidirectional fabric materials, also varying the number of layers, were adopted in tests: high-modulus carbon, standard carbon, E-glass, and basalt. The composites were produced layer-by-layer by hand lay-up method, using an epoxy-based resin as matrix. The results have shown a strain increase at failure of both standard carbon and high-modulus carbon fibres with the volume decrease of these materials in hybrid combinations. It was also concluded that combining high-modulus carbon with E-glass, high-modulus carbon with basalt, or high-modulus carbon with standard carbon can lead to very good pseudo-ductile tensile behaviour. Finally, it should be highlighted that an existing analytical model in the literature was satisfactorily adopted to predict the tensile response of these hybrid composites.

show abstract

“…Externally bonded carbon fiber-reinforced polymer (CFRP) sheets have been widely used to restore or increase the capacities of reinforced concrete (RC) beams due to their advantages including their low weight, high strength and stiffness, high durability, and ease of application (Kang et al 2012;Ouezdou et al 2009;Grelle and Sneed 2013;Ren et al 2015). Many studies have been conducted to study the effect of CFRP sheets on the performance of RC beams (Al-Rousan and Issa 2011;Oudah and El-Hacha 2013a, b;EISafty et al 2014;Kang et al 2014). However, several researchers have demonstrated that applying CFRP sheets as externally bonded strips for flexural strengthening of RC structural elements uses only 20-30% of their strength (Motavalli et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Fatigue Assessment Model of Corroded RC Beams Strengthened with Prestressed CFRP Sheets

Hou

2017

Int J Concr Struct Mater

View full text Add to dashboard Cite

This paper presents a fatigue assessment model that was developed for corroded reinforced concrete (RC) beams strengthened using prestressed carbon fiber-reinforced polymer (CFRP) sheets. The proposed model considers the fatigue properties of the constituent materials as well as the section equilibrium. The model provides a rational approach that can be used to explicitly assess the failure mode, fatigue life, fatigue strength, stiffness, and post-fatigue ultimate capacity of corroded beams strengthened with prestressed CFRP. A parametric analysis demonstrated that the controlling factor for the fatigue behavior of the beams is the fatigue behavior of the corroded steel bars. Strengthening with one layer of non-prestressed CFRP sheets restored the fatigue behavior of beams with rebar at a low corrosion degree to the level of the uncorroded beams, while strengthening with 20-and 30%-prestressed CFRP sheets restored the fatigue behavior of the beams with medium and high corrosion degrees, respectively, to the values of the uncorroded beams. Under cyclic fatigue loading, the factors for the strengthening design of corroded RC beams fall in the order of stiffness, fatigue life, fatigue strength, and ultimate capacity.

show abstract

Hybrid Effects of Carbon-Glass FRP Sheets in Combination with or without Concrete Beams

Cited by 25 publications

References 11 publications

Characterisation of Hybrid Carbon Glass Fiber Reinforced Polymer (C/GFRP) of Balanced Cross Ply and Quasi Isotropic under Tensile and Flexural Loading

Characterisation of Hybrid Carbon Glass Fiber Reinforced Polymer (C/GFRP) of Balanced Cross Ply and Quasi Isotropic under Tensile and Flexural Loading

Hybrid effect and pseudo-ductile behaviour of unidirectional interlayer hybrid FRP composites for civil engineering applications

Fatigue Assessment Model of Corroded RC Beams Strengthened with Prestressed CFRP Sheets

Contact Info

Product

Resources

About