EXPERIMENTAL RESEARCH ON TENSILE PROPERTIES OF CFRP SHEETS IN SULFATE ENVIRONMENT

LIU Shengwei; ZHAO Jianchang; ZHANG Jiawei

doi:10.13204/j.gyjzG201908060007

Volume 50 Issue 8

Oct. 2020

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LIU Shengwei, ZHAO Jianchang, ZHANG Jiawei. EXPERIMENTAL RESEARCH ON TENSILE PROPERTIES OF CFRP SHEETS IN SULFATE ENVIRONMENT[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(8): 172-176. doi: 10.13204/j.gyjzG201908060007

Citation:

LIU Shengwei, ZHAO Jianchang, ZHANG Jiawei. EXPERIMENTAL RESEARCH ON TENSILE PROPERTIES OF CFRP SHEETS IN SULFATE ENVIRONMENT[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(8): 172-176. doi: 10.13204/j.gyjzG201908060007

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EXPERIMENTAL RESEARCH ON TENSILE PROPERTIES OF CFRP SHEETS IN SULFATE ENVIRONMENT

doi: 10.13204/j.gyjzG201908060007

Research Institute, Lanzhou Jiaotong University, Lanzhou 730070, China

Received Date: 2019-08-06

Abstract

Abstract

In order to study the effect of sulfate corrosion on the mechanical properties of CFRP (carbon fiber reinforced polymer) sheets, unidirectional tensile tests were carried out on 11 groups of 77 CFRP specimens. The effects of sulfate concentration and corrosion time on tensile failure characteristics, tensile strength, modulus of elasticity and elongation of CFRP sheets were considered. The results showed that: 1) Sulfate dry-wet circulation has little effect on the failure process and failure characteristics of CFRP sheet; 2) The stress-strain relationship of CFRP sheets before and after corrosion was linear elasticity; 3) The tensile strength and elongation of CFRP sheets decreased with the increase of corrosion time, and the more significant the sulfate concentration was higher; 4) Sulfate dry and wet cycle has little effect on the elastic modulus of CFRP sheet. Based on the analysis of the test data, the calculation method of tensile strength considering corrosion time was proposed. The calculated method could reflect the degradation law of tensile strength of CFRP sheet under the action of sulfate dry and wet cycle by comparing the calculated value with the experimental value.
- sulfate,
- dry-wet circulation,
- carbon fiber reinforced polymer,
- tensile properties

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References

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