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Jg Teng - One of the best experts on this subject based on the ideXlab platform.
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Strengthening and Rehabilitation of Civil Infrastructures Using Fibre-Reinforced Polymer (FRP) Composites - Strengthening and rehabilitation of civil infrastructures using fibre-Reinforced Polymer (FRP) composites
2008Co-Authors: Len C. Hollaway, Jg TengAbstract:Structurally deficient civil engineering infrastructure: Concrete, metallic, masonry and timber structures Fibre-Reinforced Polymer composites used in rehabilitation Surface preparation of component materials Flexural strengthening of Reinforced concrete beams with fibre-Reinforced Polymer composites Shear strengthening of Reinforced concrete beams with fibre-Reinforced Polymer composites Strengthening of Reinforced concrete columns with fibre-Reinforced Polymer composites Design guidelines for fibre-Reinforced Polymer strengthened Reinforced concrete structures Strengthening of metallic structures with fibre-Reinforced Polymer composites Strengthening of masonry structures with fibre-Reinforced Polymer composites Flexural strengthening application of fibre-Reinforced Polymer plates Durability of externally bonded fibre-Reinforced Polymer composite systems Quality assurance/quality control, maintenance and repair Case studies.
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strengthening and rehabilitation of civil infrastructures using fibre Reinforced Polymer frp composites
Woodhead Publications, 2008Co-Authors: Len C. Hollaway, Jg TengAbstract:Structurally deficient civil engineering infrastructure: Concrete, metallic, masonry and timber structures Fibre-Reinforced Polymer composites used in rehabilitation Surface preparation of component materials Flexural strengthening of Reinforced concrete beams with fibre-Reinforced Polymer composites Shear strengthening of Reinforced concrete beams with fibre-Reinforced Polymer composites Strengthening of Reinforced concrete columns with fibre-Reinforced Polymer composites Design guidelines for fibre-Reinforced Polymer strengthened Reinforced concrete structures Strengthening of metallic structures with fibre-Reinforced Polymer composites Strengthening of masonry structures with fibre-Reinforced Polymer composites Flexural strengthening application of fibre-Reinforced Polymer plates Durability of externally bonded fibre-Reinforced Polymer composite systems Quality assurance/quality control, maintenance and repair Case studies.
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shear capacity of fiber Reinforced Polymer strengthened Reinforced concrete beams fiber Reinforced Polymer rupture
Journal of Structural Engineering-asce, 2003Co-Authors: J F Chen, Jg TengAbstract:A recent innovation in shear strengthening of Reinforced concrete beams is to externally bond fiber-Reinforced Polymer (FRP) composites. Many studies have been undertaken on this strengthening technique. These studies have established clearly that such strengthened beams fail in shear mainly in one of the two modes: FRP rupture and FRP debonding, and have led to preliminary design proposals. This paper is concerned with the development of a simple, accurate, and rational design proposal for the shear capacity of FRP-strengthened beams which fail by FRP rupture. To this end, existing design proposals are reviewed, and their efficiencies highlighted. A new strength model is then developed, which recognizes the fundamental characteristics of FRP. The model is validated against experimental data collected from the existing literature. Finally, a new design proposal is presented.
M. Trada - One of the best experts on this subject based on the ideXlab platform.
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a review on the tensile properties of natural fiber Reinforced Polymer composites
Composites Part B-engineering, 2011Co-Authors: Harry S Ku, N. Pattarachaiyakoop, Hao Wang, M. TradaAbstract:Abstract This paper is a review on the tensile properties of natural fiber Reinforced Polymer composites. Natural fibers have recently become attractive to researchers, engineers and scientists as an alternative reinforcement for fiber Reinforced Polymer (FRP) composites. Due to their low cost, fairly good mechanical properties, high specific strength, non-abrasive, eco-friendly and bio-degradability characteristics, they are exploited as a replacement for the conventional fiber, such as glass, aramid and carbon. The tensile properties of natural fiber reinforce Polymers (both thermoplastics and thermosets) are mainly influenced by the interfacial adhesion between the matrix and the fibers. Several chemical modifications are employed to improve the interfacial matrix–fiber bonding resulting in the enhancement of tensile properties of the composites. In general, the tensile strengths of the natural fiber Reinforced Polymer composites increase with fiber content, up to a maximum or optimum value, the value will then drop. However, the Young’s modulus of the natural fiber Reinforced Polymer composites increase with increasing fiber loading. Khoathane et al. [1] found that the tensile strength and Young’s modulus of composites Reinforced with bleached hemp fibers increased incredibly with increasing fiber loading. Mathematical modelling was also mentioned. It was discovered that the rule of mixture (ROM) predicted and experimental tensile strength of different natural fibers Reinforced HDPE composites were very close to each other. Halpin–Tsai equation was found to be the most effective equation in predicting the Young’s modulus of composites containing different types of natural fibers.
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A review on the tensile properties of natural fiber Reinforced Polymer composites
Composites Part B: Engineering, 2011Co-Authors: H. Ku, N. Pattarachaiyakoop, Huamin Wang, M. TradaAbstract:This paper is a review on the tensile properties of natural fiber Reinforced Polymer composites. Natural fibers have recently become attractive to researchers, engineers and scientists as an alternative reinforcement for fiber Reinforced Polymer (FRP) composites. Due to their low cost, fairly good mechanical properties, high specific strength, non-abrasive, eco-friendly and bio-degradability characteristics, they are exploited as a replacement for the conventional fiber, such as glass, aramid and carbon. The tensile properties of natural fiber reinforce Polymers (both thermoplastics and thermosets) are mainly influenced by the interfacial adhesion between the matrix and the fibers. Several chemical modifications are employed to improve the interfacial matrix-fiber bonding resulting in the enhancement of tensile properties of the composites. In general, the tensile strengths of the natural fiber Reinforced Polymer composites increase with fiber content, up to a maximum or optimum value, the value will then drop. However, the Young's modulus of the natural fiber Reinforced Polymer composites increase with increasing fiber loading. Khoathane et al. [1] found that the tensile strength and Young's modulus of composites Reinforced with bleached hemp fibers increased incredibly with increasing fiber loading. Mathematical modelling was also mentioned. It was discovered that the rule of mixture (ROM) predicted and experimental tensile strength of different natural fibers Reinforced HDPE composites were very close to each other. Halpin-Tsai equation was found to be the most effective equation in predicting the Young's modulus of composites containing different types of natural fibers. © 2011 Elsevier Ltd. All rights reserved.
Kiyoshi Kemmochi - One of the best experts on this subject based on the ideXlab platform.
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Reusing recycled fibers in high-value fiber-Reinforced Polymer composites: Improving bending strength by surface cleaning
Composites Science and Technology, 2012Co-Authors: Jian Shi, Ryouhei Kobayashi, Limin Bao, Jun Kato, Kiyoshi KemmochiAbstract:Glass fiber-Reinforced Polymer (GFRP) composites and carbon fiber-Reinforced Polymer (CFRP) composites were recycled using superheated steam. Recycled glass fibers (R-GFs) and recycled carbon fibers (R-CFs) were surface treated for reuse as fiber-Reinforced Polymer (FRP) composites. Treated R-GFs (TR-GFs) and treated R-CFs (TR-CFs) were characterized by scanning electron microscopy (SEM) and remanufactured by vacuum-assisted resin transfer molding (VARTM). Most residual resin impurities were removed by surface treatment. Analysis indicated no adverse effect of surface treatment on bending strength. The mechanical properties of the TR-GF Reinforced Polymer (TR-GFRP) and TR-CF Reinforced Polymer (TR-CFRP) composites were determined and compared with those of R-GF Reinforced Polymer (R-GFRP) and R-CF Reinforced Polymer (R-CFRP). The bending strengths of R-GFRP (26%) and R-CFRP (49%) were very low, compared to that of virgin glass fiber-Reinforced Polymer (V-GFRP) and that of virgin carbon fiber-Reinforced Polymer (V-CFRP). The bending strength of TR-GFRP composites was improved to about 90% of that of V-GFRP, and the bending strength of TR-CFRP composites was improved to about 80% of that of V-CFRP. © 2012 Elsevier Ltd.
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Fiber-Reinforced Polymer composite materials with high specific strength and excellent solid particle erosion resistance
Wear, 2010Co-Authors: Danna Qian, Limin Bao, Kiyoshi Kemmochi, Masayuki Takatera, Atsuhiko YamanakaAbstract:It has been reported that reinforcement fiber such as carbon fiber (CF) and glass fiber (GF) can enhance the strength of Polymer composites, but reduce the particle erosion resistance of the Polymer composites. In our study, organic high-Polymer fibers (Dyneema®and Zylon®) were used as reinforcement to make fiber-Reinforced Polymers (FRPs). Tensile tests and particle erosion wear tests under various impact angles were carried out for comparison with carbon-fiber-Reinforced Polymer (CFRP), glass-fiber-Reinforced Polymer (GFRP), and unsaturated polyester (UP) resin. The damaged surfaces of the Dyneema-fiber-Reinforced Polymer (DFRP) and Zylon-fiber-Reinforced Polymer (ZFRP) were analyzed with a scanning electron microscope, and the erosion wear mechanisms of the composites were discussed. It was concluded that it was feasible to develop the FRP materials with low density, high strength, and excellent particle erosion resistance. © 2009 Elsevier B.V. All rights reserved.
N. Pattarachaiyakoop - One of the best experts on this subject based on the ideXlab platform.
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a review on the tensile properties of natural fiber Reinforced Polymer composites
Composites Part B-engineering, 2011Co-Authors: Harry S Ku, N. Pattarachaiyakoop, Hao Wang, M. TradaAbstract:Abstract This paper is a review on the tensile properties of natural fiber Reinforced Polymer composites. Natural fibers have recently become attractive to researchers, engineers and scientists as an alternative reinforcement for fiber Reinforced Polymer (FRP) composites. Due to their low cost, fairly good mechanical properties, high specific strength, non-abrasive, eco-friendly and bio-degradability characteristics, they are exploited as a replacement for the conventional fiber, such as glass, aramid and carbon. The tensile properties of natural fiber reinforce Polymers (both thermoplastics and thermosets) are mainly influenced by the interfacial adhesion between the matrix and the fibers. Several chemical modifications are employed to improve the interfacial matrix–fiber bonding resulting in the enhancement of tensile properties of the composites. In general, the tensile strengths of the natural fiber Reinforced Polymer composites increase with fiber content, up to a maximum or optimum value, the value will then drop. However, the Young’s modulus of the natural fiber Reinforced Polymer composites increase with increasing fiber loading. Khoathane et al. [1] found that the tensile strength and Young’s modulus of composites Reinforced with bleached hemp fibers increased incredibly with increasing fiber loading. Mathematical modelling was also mentioned. It was discovered that the rule of mixture (ROM) predicted and experimental tensile strength of different natural fibers Reinforced HDPE composites were very close to each other. Halpin–Tsai equation was found to be the most effective equation in predicting the Young’s modulus of composites containing different types of natural fibers.
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A review on the tensile properties of natural fiber Reinforced Polymer composites
Composites Part B: Engineering, 2011Co-Authors: H. Ku, N. Pattarachaiyakoop, Huamin Wang, M. TradaAbstract:This paper is a review on the tensile properties of natural fiber Reinforced Polymer composites. Natural fibers have recently become attractive to researchers, engineers and scientists as an alternative reinforcement for fiber Reinforced Polymer (FRP) composites. Due to their low cost, fairly good mechanical properties, high specific strength, non-abrasive, eco-friendly and bio-degradability characteristics, they are exploited as a replacement for the conventional fiber, such as glass, aramid and carbon. The tensile properties of natural fiber reinforce Polymers (both thermoplastics and thermosets) are mainly influenced by the interfacial adhesion between the matrix and the fibers. Several chemical modifications are employed to improve the interfacial matrix-fiber bonding resulting in the enhancement of tensile properties of the composites. In general, the tensile strengths of the natural fiber Reinforced Polymer composites increase with fiber content, up to a maximum or optimum value, the value will then drop. However, the Young's modulus of the natural fiber Reinforced Polymer composites increase with increasing fiber loading. Khoathane et al. [1] found that the tensile strength and Young's modulus of composites Reinforced with bleached hemp fibers increased incredibly with increasing fiber loading. Mathematical modelling was also mentioned. It was discovered that the rule of mixture (ROM) predicted and experimental tensile strength of different natural fibers Reinforced HDPE composites were very close to each other. Halpin-Tsai equation was found to be the most effective equation in predicting the Young's modulus of composites containing different types of natural fibers. © 2011 Elsevier Ltd. All rights reserved.
J F Chen - One of the best experts on this subject based on the ideXlab platform.
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shear capacity of fiber Reinforced Polymer strengthened Reinforced concrete beams fiber Reinforced Polymer rupture
Journal of Structural Engineering-asce, 2003Co-Authors: J F Chen, Jg TengAbstract:A recent innovation in shear strengthening of Reinforced concrete beams is to externally bond fiber-Reinforced Polymer (FRP) composites. Many studies have been undertaken on this strengthening technique. These studies have established clearly that such strengthened beams fail in shear mainly in one of the two modes: FRP rupture and FRP debonding, and have led to preliminary design proposals. This paper is concerned with the development of a simple, accurate, and rational design proposal for the shear capacity of FRP-strengthened beams which fail by FRP rupture. To this end, existing design proposals are reviewed, and their efficiencies highlighted. A new strength model is then developed, which recognizes the fundamental characteristics of FRP. The model is validated against experimental data collected from the existing literature. Finally, a new design proposal is presented.
