Crack-induced debonding failure in fiber reinforced plastics (FRP) strengthened concrete beams : experimental and theoretical analysis

2005 ◽  
Author(s):  
Jinlong Pan
Keyword(s):  
Theoretical Analysis ◽  
Concrete Beams ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

Study on Pre-CFRP Reinforcement Based on Anti-Arch Method

2014 ◽  
Vol 487 ◽  
pp. 500-503
Author(s):  
Dong Liang ◽  
Lu Chen ◽  
Jing Sun
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Theoretical Analysis ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Cfrp Sheet ◽  
Fiber Reinforced Plastics

The mechanism of using prestressed carbon fiber reinforced plastics (Pre-CFRP) sheet to strengthen reinforced concrete beams with anti-arch deflection method was proposed. And then the corresponding theoretical analysis was derived, and the effectiveness of this reinforcement method is verified by experiment in laboratory to improve the girders stiffness and cracking load.

Theoretical Analysis of Grinding Temperature Field for Carbon Fiber Reinforced Plastics

2010 ◽  
Vol 126-128 ◽  
pp. 52-57 ◽  
Author(s):  
Hang Gao ◽  
H.L. Ma ◽  
Yong Jie Bao ◽  
H.P. Yuan ◽  
Ren Ke Kang
Keyword(s):  
Temperature Field ◽  
Carbon Fiber ◽  
Theoretical Analysis ◽  
Fiber Direction ◽  
Grinding Temperature ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Grinding Temperature Field

A three-dimensional finite difference method (FDM) model of grinding temperature field for carbon fiber reinforced plastics (CFRP) was established, based on the homogenization of the thermal properties of the CFRP material. The effect of the fiber direction on grinding temperature distribution at different workpiece velocity was numerically simulated and analyzed. It is found that the effect of the fiber direction on grinding temperature field is remarkable in lower workpiece velocity but unapparent in higher workpiece velocity due to the anisotropy of CFRP material and the velocity of moving heat source. More than 230 °C surface grinding temperature, which will badly damage CFRP performance, may be produced in dry grinding according to the simulated analysis. During grinding the heat affected zone of CFRP is about 0.22 mm in depth direction. Furthermore, experimental results are well in agreement with those of the theoretical analysis.

Effect of long climatic ageing on the microstructure of the surface of сarbon-fiber-reinforced plastics on base epoxy matrix

2019 ◽  
pp. 157-169 ◽  
Author(s):  
I. S. Deev ◽  
E. V. Kurshev ◽  
S. L. Lonsky
Keyword(s):  
Climatic Factors ◽  
Temperate Climate ◽  
Fiber Reinforced ◽  
Humid Climate ◽  
Climatic Zones ◽  
Reinforced Plastics ◽  
Carbon Plastics ◽  
Fiber Reinforced Plastics ◽  
Determining Factor

Studies and experimental data on the microstructure of the surface of samples of epoxy сarbon-fiber-reinforced plastics that have undergone long-term (up to 5 years) climatic aging in different climatic zones of Russia have been conducted: under conditions of the industrial zone of temperate climate (Moscow, MTsKI); temperate warm climate (Gelendzhik, GTsKI); a warm humid climate (Sochi, GNIP RAS). It is established that the determining factor for aging of carbon plastics is the duration of the complex effect of climatic factors: the longer the period of climatic aging, the more significant changes occur in the microstructure of the surface of the materials. The intensity of the aging process and the degree of microstructural changes in the surface of carbon plastics are affected by the features of the climatic zone. general regularities and features of the destruction of the surface of carbon plastics after a long-term exposure to climatic factors have been established on the basis of the analysis and systematization of the results of microstructural studies.

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