Textile Fiber Composites: Testing and Mechanical Behavior

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Mechanical properties of textile-reinforced concrete (TRC) materials such as strength, stiffness, and ductility are determined through standard or novel tests conducted under uniaxial or multiaxial conditions. By documenting the nature of cracking and damage evolution, the mechanisms that contribute to enhanced ductility in composites can be studied. This is achieved through closed-loop procedures to detect the incipient failure as the load is being applied and control the test accordingly, such that a constant rate of deformation is applied. Strain-hardening behavior is a characteristic response in TRC materials and is attributed to the gradual decrease of sample stiffness as parallel microcracking takes place. Load-carrying capacity increases with an increase in strain; however, widening of cracks in a tensile stress field results in delamination and fiber pullout modes of damage. The interpretation of the stress-strain curve thus obtained is not straightforward because it is influenced significantly by the specimen size, geometry, control mode of test and loading setup. Moreover, the deformation is not homogenous but is localized within a narrow zone that undergoes progressive damage and cracking. The strain-hardening response demonstrates the behavior of the specimen in terms of its ductility and energy-absorption capacity and parameters that contribute to it. A series of mechanical properties tests developed address tension, flexure, compression, pullout, drop-weight impact, and high-speed tension. Characteristic material responses obtained include elastic properties, stiffness, toughness, stress-strain curves, fracture toughness, ultimate tensile strength, crack width, crack spacing, and moment-curvature relationship.

Original languageEnglish (US)
Title of host publicationTextile Fibre Composites in Civil Engineering
PublisherElsevier Inc.
Pages101-150
Number of pages50
ISBN (Print)9781782424697, 9781782424468
DOIs
StatePublished - 2016

Fingerprint

Textile fibers
Ductility
Stiffness
Stress-strain curves
Cracks
Strain hardening
Reinforced concrete
Textiles
Composite materials
Testing
Mechanical properties
Microcracking
Energy absorption
Load limits
Delamination
Tensile stress
Toughness
Fracture toughness
Tensile strength
Geometry

Keywords

  • Alkali-resistant glass fibers
  • Back-calculation
  • Beams
  • Carbon fiber
  • Cement composites
  • Crack spacing
  • Cracking
  • Curvature
  • Damage mechanics
  • Ductility
  • Fabric-reinforced composites
  • Fabrics
  • Fibers
  • Flexural tests
  • Impact testing
  • Laminated composites
  • Microcracking
  • Moment-curvature response
  • Polypropylene fibers
  • Pultrusion
  • Strength
  • Stress-strain
  • Tension testing
  • Textile-reinforced concrete
  • Toughening
  • Toughness

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Mobasher, B. (2016). Textile Fiber Composites: Testing and Mechanical Behavior. In Textile Fibre Composites in Civil Engineering (pp. 101-150). Elsevier Inc.. https://doi.org/10.1016/B978-1-78242-446-8.00006-9

Textile Fiber Composites : Testing and Mechanical Behavior. / Mobasher, Barzin.

Textile Fibre Composites in Civil Engineering. Elsevier Inc., 2016. p. 101-150.

Research output: Chapter in Book/Report/Conference proceedingChapter

Mobasher, B 2016, Textile Fiber Composites: Testing and Mechanical Behavior. in Textile Fibre Composites in Civil Engineering. Elsevier Inc., pp. 101-150. https://doi.org/10.1016/B978-1-78242-446-8.00006-9
Mobasher B. Textile Fiber Composites: Testing and Mechanical Behavior. In Textile Fibre Composites in Civil Engineering. Elsevier Inc. 2016. p. 101-150 https://doi.org/10.1016/B978-1-78242-446-8.00006-9
Mobasher, Barzin. / Textile Fiber Composites : Testing and Mechanical Behavior. Textile Fibre Composites in Civil Engineering. Elsevier Inc., 2016. pp. 101-150
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AB - Mechanical properties of textile-reinforced concrete (TRC) materials such as strength, stiffness, and ductility are determined through standard or novel tests conducted under uniaxial or multiaxial conditions. By documenting the nature of cracking and damage evolution, the mechanisms that contribute to enhanced ductility in composites can be studied. This is achieved through closed-loop procedures to detect the incipient failure as the load is being applied and control the test accordingly, such that a constant rate of deformation is applied. Strain-hardening behavior is a characteristic response in TRC materials and is attributed to the gradual decrease of sample stiffness as parallel microcracking takes place. Load-carrying capacity increases with an increase in strain; however, widening of cracks in a tensile stress field results in delamination and fiber pullout modes of damage. The interpretation of the stress-strain curve thus obtained is not straightforward because it is influenced significantly by the specimen size, geometry, control mode of test and loading setup. Moreover, the deformation is not homogenous but is localized within a narrow zone that undergoes progressive damage and cracking. The strain-hardening response demonstrates the behavior of the specimen in terms of its ductility and energy-absorption capacity and parameters that contribute to it. A series of mechanical properties tests developed address tension, flexure, compression, pullout, drop-weight impact, and high-speed tension. Characteristic material responses obtained include elastic properties, stiffness, toughness, stress-strain curves, fracture toughness, ultimate tensile strength, crack width, crack spacing, and moment-curvature relationship.

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KW - Carbon fiber

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KW - Crack spacing

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KW - Curvature

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KW - Toughness

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