Low Temperature Properties of Carbon Fibre Reinforced Epoxide Resins

Author(s):  
W Weiss
Keyword(s):  
2004 ◽  
Vol 31 (2) ◽  
pp. 239-252 ◽  
Author(s):  
Raafat El-Hacha ◽  
Mark F Green ◽  
R Gordon Wight

This paper presents results of an experimental investigation that examined concrete beams post-tensioned with bonded carbon fibre reinforced polymer (CFRP) sheets and then exposed to either room (+22 °C) or low (-28 °C) temperatures. The primary objective of this investigation was to assess the flexural behaviour of the strengthened beams after sustained loadings at both room and low temperatures. The strengthened beams showed significant increases in flexural stiffness and ultimate capacity as compared with the control-unstrengthened beams. Failure of the strengthened beams was by tensile rupture of the prestressed CFRP sheets. Test results showed that the long-term and low temperature effects did not adversely affect the strength of the beams. Long-term loading and low temperature exposure caused prestress losses in the CFRP sheets. The load–deflection behaviour of the long-term beams was predicted accurately by an analytical model. These results suggest that bonded prestressed CFRP sheets could be used to increase the strength of damaged prestressed concrete girders under extreme environmental conditions.Key words: strengthening, anchorage, low temperature, long-term, prestress losses, sustained load, carbon fibre reinforced polymer sheet.


2021 ◽  
Vol 59 ◽  
pp. 492-529
Author(s):  
Yue Wen ◽  
Matt D.R. Kok ◽  
Jorge Pavel Victoria Tafoya ◽  
Ana B. Jorge Sobrido ◽  
Ellsworth Bell ◽  
...  

Carbon ◽  
2005 ◽  
Vol 43 (13) ◽  
pp. 2643-2648 ◽  
Author(s):  
B.O. Boskovic ◽  
V.B. Golovko ◽  
M. Cantoro ◽  
B. Kleinsorge ◽  
A.T.H. Chuang ◽  
...  

2011 ◽  
Vol 301-303 ◽  
pp. 22-25
Author(s):  
Hua Liang Liu ◽  
Xiu Jun Liu ◽  
Zhi Jun Qiao ◽  
Tong Qi Li ◽  
Zi Jun Hu

C/C composites were prepared by low temperature and hot pressure moulding process from T300 carbon fibre and medium temperature pitch(MTP) or MP with nematic liquid crystalline. The effect of the content of carbon fibre and different proportion of MTP to MP on interlaminar bonding strength (ILBS) of C/C composites was investigated. C/C composites were characterized by ILBS test and scanning electron microscope. Results showed that the ILBS increased with the increase of the content of carbon fibre and proportion of MTP. When the content of carbon fibre was 60.5%, the ILBS of composites prepared from MP reached up to 1.498MPa, and to 3.031MPa from MTP.


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