EXPERIMENTAL STUDY ON THE SIZE EFFECT OF TENSILE PERFORMANCE OF GFRP BARS WITH DIFFERENT DIAMETERS

Abstract

Abstract: In order to study the law of size effect on the tensile performance indexes of GFRP bars, the tensile performance experiments of GFRP bars with 5 kinds of different diameters were conducted by the electro-hydraulic servo universal testing machine. The experimental results show that the influence of size effect on ultimate strength and ultimate tensile strain are significant. With the diameter increases, the ultimate strength and ultimate tensile strain increase as well, while the influence on elastic modulus is not obvious. The failure mode of specimens belongs to splitting failure and the stress-strain curves show a linear relationship; The average value of elastic modulus is 48.06GPa. The influence of different slenderness ratio on the ultimate strength of specimens with the same diameter should conduct a further study.

Key words: GFRP bar, tensile performance, size effect, stress-strain curve, elastic modulus

CLC Number:

TB332
TU502

WU Jun, CHEN Wen-xue, JIAO Yu-zhao. EXPERIMENTAL STUDY ON THE SIZE EFFECT OF TENSILE PERFORMANCE OF GFRP BARS WITH DIFFERENT DIAMETERS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(4): 35-40.

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