On steady-state fibre pull-outI The stress field

Zhang, Xi; Liu, Hong-Yuan; Mai, Yiu‐Wing; Xu, Dongsheng

doi:10.1016/s0266-3538(99)00110-4

Cited by 44 publications

(27 citation statements)

References 12 publications

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“…Single-fibre strength parameters were determined through Single Fibre Tensile Tests (SFTT) at 10 and 20 mm gauge lengths (Pimenta and Pinho, 2014); the Weibull modulus m was estimated using the average strengths of fibres at both gauge lengths. (Zhang et al, 1999, Zhou et al, 1992. The corresponding in-situ frictional stress at V f = 60% is τ µ = 4.0 MPa (Appendix D).…”

Section: Validation Against Experimental Resultsmentioning

confidence: 99%

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An analytical model for the translaminar fracture toughness of fibre composites with stochastic quasi-fractal fracture surfaces

Pimenta

Pinho

2014

Journal of the Mechanics and Physics of Solids

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The translaminar fracture toughness of fibre-reinforced composites is a size-dependent property which governs the damage tolerance and failure of these materials. This paper presents the development, implementation and validation of an original analytical model to predict the tensile translaminar (fibre-dominated) toughness of composite plies and bundles, as well as the associated size effect. The model considers, as energy dissipation mechanisms, debonding and pull-out of bundles from quasi-fractal fracture surfaces; the corresponding lengths are stochastic variables predicted by the model, based on the respective bundle strength distributions and fracture mechanics. Parametric studies show that composites are toughened by stronger fibres with large strength variability, and intermediate values of interfacial toughness and friction. Predictions are validated against four different composite ply systems tested in the literature, proving the models ability to capture not only size effects, but also the influence of different fibres and resins.

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Section: Validation Against Experimental Resultsmentioning

confidence: 99%

“…Equation D.2 neglects Poisson's effects due to axial loading; while this could be easily incorporated in the SFPO analysis (Gao et al, 1988, Zhang et al, 1999, Zhou et al, 1992, the resulting non-linear stress profiles would impede the calculation of bundle survival probabilities according to Appendix E.…”

Section: Appendix D Frictional Stresses During Pull-outmentioning

confidence: 99%

An analytical model for the translaminar fracture toughness of fibre composites with stochastic quasi-fractal fracture surfaces

Pimenta

Pinho

2014

Journal of the Mechanics and Physics of Solids

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“…It should be mentioned that the theoretical model developed here is based on the following two assumptions: (1) the axial stresses are independent of the radial distance in any cross-section of the composite; and (2) the matrix shear strain is approximately given by γ rz m = ∂u z m ∂r , where u z m is matrix displacement in the axial direction [13].…”

Section: Theoretical Modelmentioning

confidence: 99%

“…In a manner similar to the treatment in [7] for the pull-out test, the single piezoelectric fibre push-out test is here analyzed using the shear-lag model with some modifications [13,14]. This is done by extending the Lamé solution for the elastic axisymmetric problem to the single piezoelectric fibre push-out problem.…”

Section: Introductionmentioning

confidence: 99%

A theoretical model for electroelastic analysis in piezoelectric fibre push-out test

2006

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A theoretical model is presented to study the elastic deformation process and frictional sliding behavior in single piezoelectric fibre push-out tests. Based on the theoretical model and some necessary simplifications, stress and electric fields are obtained for push-out tests of a circular piezoelectric fibre embedded in an elastic matrix. Numerical results of a piezoelectric fibre/expoxy matrix system are presented to verify the proposed formulation. The study shows that there is a significant effect of the piezoelectric parameter and embedded fibre length on stress transfer, electric field distribution and load-displacement curve of the frictional sliding process. This study also indicates that the piezoelectric effect has a distinct influence on the mechanical behavior and properties of the interface in a fibre/matrix system.

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“…The advantages of this criterion were detailedly discussed by Stang et al [29]. Zhang et al [31] presented an improved model to obtain the stress fields in both bonded and debonded regions at the fiber-matrix interface by considering a pull-out rate-dependent frictional coefficient. The whole process of pulling out a single fiber was then modeled numerically [21].…”

Section: Introductionmentioning

confidence: 99%

Analytical solution for the pull-out response of FRP rods embedded in steel tubes filled with cement grout

Yang

Zheng

et al. 2009

Mater Struct

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Fiber-reinforced plastic (FRP) tendons have been widely used for ground anchors in civil engineering. Although various pull-out tests of FRP rods from grout-filled steel tubes have been conducted to simulate ground anchors in rock, there are relatively few theoretical studies reported in the literature for this type of bonded anchorages. The intention of this paper is to present an analytical solution for predicting the maximum pull-out load of FRP rods embedded in steel tubes filled with cement grout. First, the expression of the shear stress along the thickness direction of the grout layer is obtained analytically. The tensile stress in the rod and the interfacial shear stress at the rodgrout interface are formulated at different loading stages. By modeling interfacial debonding as an interfacial shear crack, the pull-out load is then expressed as a function of the interfacial crack length. Finally, based on the Lagrange multiplier method, the maximum pull-out load and the critical crack length are determined. The validity of the proposed analytical solution is verified with the experimental results obtained from literature. It can be concluded that the proposed analytical solution can predict the maximum pull-out load of spiral wound and indented rods embedded in steel tubes filled with cement grout with reasonable accuracy. The proposed solution can be also applied in predicting the pull-out capacity of steel bars from concrete.

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On steady-state fibre pull-outI The stress field

Cited by 44 publications

References 12 publications

An analytical model for the translaminar fracture toughness of fibre composites with stochastic quasi-fractal fracture surfaces

An analytical model for the translaminar fracture toughness of fibre composites with stochastic quasi-fractal fracture surfaces

A theoretical model for electroelastic analysis in piezoelectric fibre push-out test

Analytical solution for the pull-out response of FRP rods embedded in steel tubes filled with cement grout

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