Abstract This paper experimentally investigated the effect of temperature on the transverse impact response of preloaded carbon fiber reinforced polymer (CFRP) wire. The CFRP wires with a glass transition temperature of 99 °C were tested in the temperature range of -40 to 80 °C using a drop-weight impact test system. The results show that the maximum impact force, maximum wire tension and transverse deflection at fracture of the wire increased as the temperature increased from -40 to 80 °C, due to the ductility of the resin, effective redistribution of internal stresses and reduced stress concentration in the wire at high temperatures; and the energy dissipating capacity was also improved resulting from the low impact damage at high temperatures. A temperature-dependent function to quantify the effect of temperature on the impact response of CFRP wire was established, and formulas for predicting the impact resistance of preloaded CFRP wires at various temperatures were provided.
AbstractThe transverse static performance and low-velocity impact response of individual carbon fiber–reinforced polymer (CFRP) wires were investigated experimentally in this study. First, the axia...
#1Johann Körbelin(TUHH: Hamburg University of Technology)H-Index: 4
#2Manuel Derra(TUHH: Hamburg University of Technology)H-Index: 1
Last. Bodo Fiedler(TUHH: Hamburg University of Technology)H-Index: 27
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Abstract This study focuses on the effect of temperature and impact energy on the damage in CFRP under low velocity impact. Quasi-isotropic laminates with a thickness of 4.1 mm were impacted with energies between 8 and 21 J at temperatures ranging between 20 and 80 ° C . The resulting damage was assessed using ultrasonic C-scans, radiography and confocal microscopy. The residual strength was evaluated utilizing compressive tests at 20 ° C . It was found that delamination size is decreasing with ...
Last. Asghar Vatani Oskouei(SRTTU: Shahid Rajaee Teacher Training University)H-Index: 14
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Abstract In this study, the effects of fiber type (i.e., carbon and glass fibers) and intumescent paint on the tensile performance of fiber reinforced polymer (FRP) sheets at elevated temperatures are investigated. For this purpose, a series of tensile tests were conducted on the glass and carbon fiber reinforced polymer (GFRP and CFRP) sheets, with and without intumescent fire retardant paint, at different elevated temperatures. The studied temperatures ranged from 25 °C to 600 °C. Scanning ele...
Abstract Carbon fibre-reinforced polymer (CFRP), a polymer matrix composite material, has been increasingly used in industry, science, daily use equipment and engineering in recent decades. In civil engineering, when a construction structure reinforced with external bonded CFRP is subjected to fire, both the structure and CFRP reinforcement are concurrently affected by the elevated temperature and mechanical load. In Eurocode, the evolution of the mechanical properties of concrete and steel are ...
AbstractFlexural behavior of textile-reinforced concrete (TRC) samples were investigated by using three-point bending test systems under quasi-static and low-velocity (1.0–4.5 m/s) impact loadings...
#1Rami J.A. Hamad(Universiti Sains Malaysia Engineering Campus)H-Index: 2
#1Rami J.A. Hamad(Universiti Sains Malaysia Engineering Campus)H-Index: 1
Last. Rami H. Haddad(JUST: Jordan University of Science and Technology)H-Index: 20
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Abstract This paper presents the results of an experimental study on the effect of elevated temperatures on the mechanical properties of FRP bars and the bond behavior between FRP bars and concrete. Four types of reinforcement bars namely: basalt fiber reinforced polymer (BFRP), CARBON fiber reinforced polymer (CFRP), glass fiber reinforced polymer (GFRP), and steel bars of 10 mm diameter were used. The results showed that the FRP bars suffered significant reductions in their mechanical properti...
Last. Jacopo Tirillò(Sapienza University of Rome)H-Index: 25
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Abstract In this work, thermoplastic composites based on poly(ethylene 2,6-naphthalate) (PEN) have been investigated with the aim to elucidate the effect of temperature on static and impact properties. The matrix was reinforced with four different high performing woven fabrics based on carbon, Twaron, Vectran, basalt fibres. Composites were manufactured by using the film stacking technique, alternating layers of balanced plain weave fabrics (0/90) and films of amorphous PEN, keeping the fibre vo...
Impact damage is one of the major concerns that should be taken into account with the new aircraft and spacecraft structures which employ ever-growing use of composite materials. Considering the thermal loads encountered at different altitudes, both low and high temperatures can affect the properties and impact behavior of composite materials. This study aims to investigate the effect of temperature and impactor diameter on the impact behavior and damage development in balanced and symmetrical C...
Last. José Daniel Diniz Melo(UFRN: Federal University of Rio Grande do Norte)H-Index: 13
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Abstract The influence of operational environments on the long-term durability of structural components fabricated with carbon fiber reinforced composites is an ongoing concern. Exposures to ultraviolet radiation, temperature cycles and moisture are known to degrade the polymeric matrix. In this work, carbon-epoxy composites were subjected to accelerated aging in an aging chamber with controlled conditions of temperature, humidity and UV-radiation. Changes within the material are evaluated by Fo...
#2Victor C. Li(UM: University of Michigan)H-Index: 106
Abstract Carbon fiber reinforced polymer (CFRP) composites have been accepted for the strengthening of concrete structures. Polymer adhesives are generally adopted for bonding CFRP to the concrete substrate. These polymer adhesives have been facing challenges due to elevated temperatures in fire. Although cementitious adhesives were proposed to replace polymer adhesives, they were found brittle and could hardly sustain high temperatures due to spalling. In the current study, engineered cementiti...
Abstract null null null The current study experimentally investigated the influence of elevated-temperature exposure on the mechanical performance of null carbon fiber reinforced polymer null (CFRP) wires through conducting the axial tensile, three-point bending and transverse load tests. The results show that the CFRP wires under null null axial tensile load null null null exhibited a null brittle fracture null after exposure to 30 and 100 °C, and the wires after 200 °C exposure were pulled out...
Abstract This study investigated the mechanical behavior of carbon fiber reinforced polymer (CFRP) wires subjected to combined tension and bending through transverse load tests and finite element analysis (FEA). The properties of the CFRP wires were examined through axial tensile and three-point bending tests. Transverse static load tests were conducted on CFRP wires under pretension ratios ranging from 0.00 to 0.85 to investigate the failure responses of the wires. FEA models considering the Ha...