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Measurement of tensile mechanical properties of fiber reinforced plastic rebars by 3D digital image correlation

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Published/Copyright: February 13, 2021
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Materials Testing
From the journal Materials Testing Volume 62 Issue 4

Abstract

Fiber reinforced plastic (FRP) plays an increasingly important role in many engineering fields due to its advantages of light weight, low cost, simple maintenance, and excellent corrosion resistance. The conventional contact methods for deformation measurement, such as strain gauge and mechanical extensometer, have some shortcomings in measuring the strain of FRP rebar specimens with spiral curved surfaces. Therefore, the non-contact three-dimensional digital image correlation (3D-DIC) technique was employed to determine the tensile mechanical properties of two types of FRP rebar specimens, i. e. glass FRP (GFRP) and carbon FRP (CFRP) specimens. Uniaxial tensile tests with three different loading rates were conducted to obtain the stress-strain curves, elastic modulus, tensile strength and percentage total extension at maximum force of these two FRP specimens. Experimental results indicate that the axial-strain field of all FRP rebar specimens present nonuniform distribution and that the stress of GFRP and CFRP rebars varies linearly with the strain. Moreover, no yielding phenomenon was observed from the stress-strain curves, which indicates that both GFRP and CFRP rebars belong to the group of typical brittle materials. The dispersion of elastic moduli obtained using 3D-DIC is better than that using a clip-on extensometer, which demonstrates the validity of 3D-DIC for the determination of tensile mechanical properties of FRP rebars with spiral curved surfaces.

Keywords: mechanical properties; fiber reinforced plastic; elastic modulus; ultimate strength; threedimensional digital image correlation
Published Online: 2021-02-13
Published in Print: 2020-04-01

© 2020 by Walter de Gruyter Berlin/Boston

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  1. CONTENTS
  2. Materials Testing
  3. FATIGUE TESTING
  4. Influence of specimen diameter size on the deformation behavior and short-term strength range of an aluminum alloy
  5. Influence of nozzle temperature and volumetric filling on the mechanical properties of 3D-printed PEEK
  6. Investigation on endurance evaluation of a portal crane: experimental, theoretical and finite element analysis
  7. Butterfly optimization algorithm for optimum shape design of automobile suspension components
  8. Optimal design of automobile structures using moth-flame optimization algorithm and response surface methodology
  9. Efficient synthesis of porous graphitic carbon nitride nanosheets with different precursors via thermal condensation
  10. The spotted hyena optimization algorithm for weight-reduction of automobile brake components
  11. Mechanical behavior of pressurized composite pipes made of various materials
  12. Mechanical properties and wear-corrosion resistance of a new compound extrusion process for magnesium alloy AZ61
  13. Electrical contact performance of various electro-deposited graphene reinforced silver-based nanocomposites
  14. Effects of boric acid addition and sintering temperature on the thermal conductivity of perlitebased insulation materials
  15. Determination of stress concentration factors for shafts under tension
  16. Measurement of tensile mechanical properties of fiber reinforced plastic rebars by 3D digital image correlation
  17. Influence of various structural micro-defects on the fracture of cyclically stressed components revisited
  18. IMPRESSUM
https://doi.org/10.3139/120.111501
Keywords for this article
mechanical properties; fiber reinforced plastic; elastic modulus; ultimate strength; threedimensional digital image correlation

Articles in the same Issue

  1. CONTENTS
  2. Materials Testing
  3. FATIGUE TESTING
  4. Influence of specimen diameter size on the deformation behavior and short-term strength range of an aluminum alloy
  5. Influence of nozzle temperature and volumetric filling on the mechanical properties of 3D-printed PEEK
  6. Investigation on endurance evaluation of a portal crane: experimental, theoretical and finite element analysis
  7. Butterfly optimization algorithm for optimum shape design of automobile suspension components
  8. Optimal design of automobile structures using moth-flame optimization algorithm and response surface methodology
  9. Efficient synthesis of porous graphitic carbon nitride nanosheets with different precursors via thermal condensation
  10. The spotted hyena optimization algorithm for weight-reduction of automobile brake components
  11. Mechanical behavior of pressurized composite pipes made of various materials
  12. Mechanical properties and wear-corrosion resistance of a new compound extrusion process for magnesium alloy AZ61
  13. Electrical contact performance of various electro-deposited graphene reinforced silver-based nanocomposites
  14. Effects of boric acid addition and sintering temperature on the thermal conductivity of perlitebased insulation materials
  15. Determination of stress concentration factors for shafts under tension
  16. Measurement of tensile mechanical properties of fiber reinforced plastic rebars by 3D digital image correlation
  17. Influence of various structural micro-defects on the fracture of cyclically stressed components revisited
  18. IMPRESSUM
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