scholarly journals Experimental and Theoretical Research on the Compression Performance of CFRP Sheet Confined GFRP Short Pipe

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Feng Li ◽  
Qilin Zhao ◽  
Li Chen ◽  
Guojian Shao
Keyword(s):  
Compressive Stress ◽  
Theoretical Research ◽  
Geometrical Parameters ◽  
Hollow Section ◽  
Compression Performance ◽  
Iterative Calculation ◽  
Axial Tensile ◽  
Cfrp Sheet ◽  
Combined Structure ◽  
Axial Compressive Stress

The axial compressive strength of unidirectional FRP made by pultrusion is generally quite lower than its axial tensile strength. This fact decreases the advantages of FRP as main load bearing member in engineering structure. A theoretical iterative calculation approach was suggested to predict the ultimate axial compressive stress of the combined structure and analyze the influences of geometrical parameters on the ultimate axial compressive stress of the combined structure. In this paper, the experimental and theoretical research on the CFRP sheet confined GFRP short pole was extended to the CFRP sheet confined GFRP short pipe, namely, a hollow section pole. Experiment shows that the bearing capacity of the GFRP short pipe can also be heightened obviously by confining CFRP sheet. The theoretical iterative calculation approach in the previous paper is amended to predict the ultimate axial compressive stress of the CFRP sheet confined GFRP short pipe, of which the results agree with the experiment. Lastly the influences of geometrical parameters on the new combined structure are analyzed.

Study on the Compression Performance of CFRP Confined GFRP Short Column

2011 ◽  
Vol 295-297 ◽  
pp. 292-300
Author(s):  
Li Chen ◽  
Qi Lin Zhao ◽  
Jian Guo Song ◽  
Yong Ding
Keyword(s):  
Bearing Capacity ◽  
Compressive Stress ◽  
Geometrical Parameters ◽  
Lateral Expansion ◽  
Experiment Research ◽  
Compression Performance ◽  
Iterative Calculation ◽  
Cfrp Sheet ◽  
Combined Structure ◽  
Axial Compressive Stress

In order to restrain the lateral expansion and splitting of GFRP, and accordingly heighten its axial compressive bearing capacity, a project that to confine GFRP column with surrounding CFRP sheet is suggested in the present study. Experiment on the CFRP sheet confined GFRP column shows that a combined structure of high bearing capacity is attained. Basing on the experiment research a theoretical iterative calculation approach is suggested to predict the ultimate axial compressive stress of the combined structure, and the predicted results agree well with the experimental results. Then the influences of geometrical parameters on the ultimate axial compressive stress of the combined structure are also analyzed basing on this approach.

The Prime Importance of Second-Order Effects in Rigid-Rod Polymers

1988 ◽  
Vol 134 ◽  
Author(s):  
Steven J. Deteresa ◽  
Richard J. Farris
Keyword(s):  
Compressive Stress ◽  
High Performance ◽  
Second Order ◽  
Shear Instability ◽  
Polymer Fibers ◽  
Order Effects ◽  
Axial Tensile ◽  
High Performance Polymer ◽  
Rigid Rod ◽  
Axial Compressive Stress

ABSTRACTThe torsion modulus of high performance rigid-rod polymer fibers is shown to be dependent on axial tensile stress. This behavior is one of at least second-order elasticity. Fiber ultimate tensile strengths are of the same magnitude as torsion moduli, and increases in torsion moduli in excess of 200% were observed for fibers under tension. Consideration of the effect of an axial compressive stress on fiber torsion modulus leads to a prediction of an elastic shear instability that initiates at a compressive stress approximately equal in magnitude to the zero-stress torsion modulus. Hence, it is concluded that the compressive strengths of high performance polymer fibers are limited by the onset of an elastic microstructural instability.

Influence Factors of the Compression Performance of CFRP Sheet Confined GFRP Short Pipe

2012 ◽  
Vol 256-259 ◽  
pp. 863-866
Author(s):  
Feng Li ◽  
Qi Lin Zhao ◽  
Jian Ping Wang
Keyword(s):  
Failure Modes ◽  
Influence Factors ◽  
Geometrical Parameters ◽  
Outer Diameter ◽  
Fiber Reinforced ◽  
Longitudinal Splitting ◽  
Compression Performance ◽  
Reinforced Plastics ◽  
Cfrp Sheet ◽  
Fiber Reinforced Plastics

Compression performance of pultruded GFRP (Glass Fiber Reinforced Plastics) can be improved by confined CFRP (Carbon Fiber Reinforced Plastics) sheet, but it was affected by some factors. Two groups GFRP short pipe specimens of different outer diameter (104mm and 76mm) were axial compressed. The failure modes of longitudinal splitting and compressive strength failure for the GFRP pipes and those confined by CFRP sheet respectively were comparatively analyzed. Analysis on the influence to the compressive performance of GFRP short pipes confined by CFRP sheet was made from mechanical and geometrical parameters of the CFRP and GFRP in numerical methods. The laws of improvement of compression performance of CFRP sheet confined GFRP short pipe were recognized.

THE DYNAMIC IMPACT RESPONSE OF PP∕PA BLENDS UNDER MULTI-AXIAL COMPRESSIVE STRESS STATE

2008 ◽  
Author(s):  
Shi Shaoqiu ◽  
Yu Bing ◽  
Yan Linbao ◽  
Alberto D’Amore ◽  
Domenico Acierno ◽  
...  
Keyword(s):  
Stress State ◽  
Compressive Stress ◽  
Impact Response ◽  
Dynamic Impact ◽  
Axial Compressive Stress

scholarly journals Design and analysis of a toroidal tester for the measurement of core losses under axial compressive stress

2017 ◽  
Vol 432 ◽  
pp. 519-526 ◽  
Author(s):  
Natheer Alatawneh ◽  
Tanvir Rahman ◽  
David A. Lowther ◽  
Richard Chromik
Keyword(s):  
Compressive Stress ◽  
Core Losses ◽  
Axial Compressive Stress
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