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Journal of Materials Science

, Volume 29, Issue 10, pp 2719–2724 | Cite as

Experimental determination of the stress-crack opening relation in fibre cementitious composites with a crack-tip singularity

  • V. C. Li
  • M. Maalej
  • T. Hashida
Papers

Abstract

A J-based-fracture-testing method is presented for determining the bridging-stress-crackopening-displacement (σ-δ) relationship in fibre-reinforced composites where the crack-tip toughness is not negligible. The J-based technique originally proposed for concrete has been well-established for cementitious composites where the fracture process is primarily dominated by the formation of a fracture-process zone and the contribution of the crack-tip toughness is negligibly small. In this study, the J-based technique is further extended to cover materials for which the crack-tip stress singularity coexists with the fracture-process zone. This extended version of the J-based technique explicitly accounts for the crack-tip singularity while considering the fracture-process zone. This newly derived testing technique has been applied to a high-strength-mortar (HSM) reinforced with carbon and steel fibres where the fibrebridging toughness can be of the same order of magnitude as the crack-tip toughness. The validity of the σ-δ relationships deduced has been examined by comparing with results obtained from direct uniaxial tension tests. It is suggested that the J-based-fracture-testing technique can provide reasonable σ-δ relationships and fracture parameters in a fibrereinforced HSM.

Keywords

Fracture Process Uniaxial Tension Tension Test Steel Fibre Extended Version 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • V. C. Li
    • 1
  • M. Maalej
    • 1
  • T. Hashida
    • 1
  1. 1.Advanced Civil Engineering Materials Research Laboratory, Department of Civil and Environmental EngineeringUniversity of MichiganAnn ArborUSA

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