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http://dx.doi.org/10.11112/jksmi.2019.23.4.137

Study on Strain Response Converted from Deformation in Tensile Test of Carbon Fiber Reinforced Polymers (CFRP)  

Kim, Yun-Gon (Daegu University)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.23, no.4, 2019 , pp. 137-144 More about this Journal
Abstract
In coupon test of carbon fiber reinforced polymers (CFRP) as brittle materials, the converted strain derived from total deformation and effective length was introduced and its advantages were described. In general, measured value from strain gauge is used for determining the tensile properties of material, but it is not quite effective in CFRP because brittle material can not redistribute its stress and it only represents local behavior. For this reason, the converted strain response can be utilized effectively as a supplementary indicator, which evaluated the average value of tensile properties in brittle material and confirmed the strain measured by strain gauge. In addition, the converted strain clearly visualized 1) the effect of initial internal strain caused by fabrication errors and setup misalignment when applying gripping force and 2) post-response of partial rupture of CFRP caused by non-uniform strain distribution. non-uniform strain distribution.
Keywords
carbon fiber reinforced polymers; brittle material; coupon test; converted strain;
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  • Reference
1 ACI Committee 440 (2004), Guide Test Methods for Fiber- Reinforced Polymers (FRPs) for Reinforcing or Strengthening Concrete Structures (ACI 440.3R-04), American Concrete Institute, 40.
2 ACI Committee 440 (2017), Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-17), American Concrete Institute, 110.
3 ASTM D638 (2002), Standard Test Method for Tensile Properties of Plastics, American Society for Testing Materials (ASTM International), 13.
4 ASTM D3039 (2007), Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials, American Society for Testing Materials (ASTM International), 13.
5 ASTM D4762 (2011), Standard Guide for Testing Polymer Matrix Composite Materials, American Society for Testing Materials, 21.
6 ASTM D7290-06 (2011), Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications, American Society for Testing Materials, 4.
7 Bank, L. (2006), Composites for Construction: Structural Design with FRP Materials, Wiley, 560.
8 Fyfe Co. LLC (2010), Quality Control Manual for the Tyfo Fibrwrap System, Fyfe Co., 100.
9 Hughes Brothers (2011), Aslan 100 Glass Fiber Reinforced Polymer(GFRP) Rebar Product Data Sheet, Hughes Brothers, 2.
10 Kim, Y. (2011), Shear Behavior of Reinforced Concrete T-Beams Strengthened with Carbon Fiber Reinforced Polymer Sheets and CFRP anchors, Ph.D Dissertation. The University of Texas at Austin, 405.
11 KS F ISO 10406-2: 2015 (2015), Fibre-reinforced polymer(FRP) reinforcement of concrete - Test methods - Part 2: FRP sheets, 32.
12 NCHRP Report 655 (2010), Recommended Guide Specification for the Design of Externally Bonded FRP Systems for Repair and Strengthening of Concrete Bridge Elements, Transportation Research Board, 118.
13 You, Y. et al. (2006), Establishment of test items, methods and criteria for certification of FRP strengthening technology, Korea Institute of Civil Engineering and Building Technology, 1014.