A new theoretical model of the quasistatic single-fiber pull-out problem: A rate-dependent interfacial bond strength

2016 ◽  
Vol 94 ◽  
pp. 132-141 ◽  
Author(s):  
Wen-Xue Chang ◽  
Hai Qing ◽  
Cun-Fa Gao
Keyword(s):  
Theoretical Model ◽  
Bond Strength ◽  
Single Fiber ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Rate Dependent ◽  
Pull Out

Influence of Fiber Embedded Length on Properties of Single Fiber Pull-Out Test

2014 ◽  
Vol 919-921 ◽  
pp. 2061-2070
Author(s):  
Ya Fang Zhang ◽  
Pei Ran Chen ◽  
Hao Liu ◽  
Qing Hua Wu
Keyword(s):  
Bond Strength ◽  
Numerical Models ◽  
Polypropylene Fiber ◽  
Fiber Reinforced Concrete ◽  
Single Fiber ◽  
Test Results ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Pull Out ◽  
Damage Process

The reinforcing and toughening effect of fiber reinforced concrete (FRC) are mainly under control of the interfacial bond strength in between of fiber and concrete, and the embedded length of fiber is one of the significant factors for interfacial bond strength. In this paper, pull-out numerical models based on single steel or polypropylene fiber have been studied with the fiber embedded length set as a variable and the influence of fiber embedded length on properties of single fiber pullout has, therefore, been analyzed. The results indicate that the longer the fiber embedded length, the larger the peak index and pull-out toughness of single fiber pull-out specimen could be reached, while the interfacial bond strength would decrease. The variation of fiber embedded length has only a little impact upon the damage process of pullout. Finally, the test results for specimen with the polypropylene fiber is more sensitive to the changes of embedded length compared those with steel fiber

Experimental Research on Interfacial Bond Performance in Rock Anchor with High-Performance Grouting Medium

2012 ◽  
Vol 517 ◽  
pp. 932-938 ◽  
Author(s):  
Zhi Fang ◽  
Hong Qiao Zhang
Keyword(s):  
Rock Mass ◽  
Bond Strength ◽  
High Performance ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Bond Performance ◽  
Pull Out ◽  
Steel Bar ◽  
Reactive Powder ◽  
Ground Anchor

There exist the problems such as low bond strength and bad durability in the ordinary grouting slurry of the ground anchor system at present. The high-performance grouting mediums RPC (Reactive Powder Concrete) and DSP (Densified Systems containing homogeneously arranged ultrafine Particles) would become the potential replacement of grouting medium in ground anchor resulting from their high compressive strength, durability and toughness. Based on a series of pull-out tests on ground anchors with different high-performance grouting medium of RPC and DSP , different bond length in the construction field, the bond performance on the interfaces between anchor bolt (deformed steel bar) and grouted medium as well as between grouted medium and rock mass was studied. The results indicate that the interfacial bond strength between RPC or DSP and deformed steel bolt ranges within 23-31Mpa, far greater than that (about 2-3MPa) between the ordinary cementitious grout and deformed steel bar. Even though the interfacial bond strength between the grouted medium and rock mass of limestone was not obtained in the test since the failure mode was pull-out of those steel bar rather than the interface shear failure between grouted medium and rock mass, the bond stress on the interface reached 6.2-8.38 MPa, also far greater than the bond strength (about 0.1-3MPa) between the ordinary cementitious slurry and rocks.

scholarly journals A Special Single-Fibre Pull-Out Technique for Determining the Fiber/Cement Interfacial Bond Strength

2002 ◽  
Vol 11 (1) ◽  
pp. 096369350201100 ◽  
Author(s):  
J. M. Caceres ◽  
A. N. Netravali
Keyword(s):  
Shear Strength ◽  
Bond Strength ◽  
Interfacial Shear Strength ◽  
Single Fibre ◽  
Interfacial Shear ◽  
Specimen Geometry ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Pull Out ◽  
Fibre Cement

The paper discusses a simple specimen geometry to obtain the fibre/cement interfacial shear strength (IFSS). The specimens are easy to prepare and easy to test. The technique gives reliable and reproducible results. IFSS results for five different fibres with cement were measured. Most IFSS values obtained are in the range of 0.15 to 1.5 MPa. Despite the simplicity of the technique presented in this study, the results are in agreement with those obtained by several other researchers using different techniques and specimen geometry.

Bond-Slip Mechanisms in Steel Micro-Fiber Reinforced Cement Composites

1994 ◽  
Vol 370 ◽  
Author(s):  
N. Banthia ◽  
N. Yan ◽  
C. Chan ◽  
C. Yan ◽  
A. Bentur
Keyword(s):  
Bond Strength ◽  
Silica Fume ◽  
Cement Composites ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Bond Slip ◽  
Pull Out ◽  
Fiber Size ◽  
The Matrix ◽  
Reinforced Cement

AbstractBond-slip characteristics for steel micro-fibers bonded in cement-based matrices were investigated by conducting single fiber pull-out tests. The influence of the following factors was investigated: fiber inclination, fiber size, fiber embedded length and matrix refinement using silica fume. It was found that the bond-slip characteristics of fibers aligned with respect to the loading direction were necessarily superior than those inclined at an angle. Inclined fibers supported smaller peak pull-out loads and absorbed lesser pull-out energies than the aligned fibers. The use of silica fume in the matrix was found to improve both the average interfacial bond strength and the maximum interfacial bond strength between the fiber and the matrix.

Interfacial Bond Strength in SiC/C/SiC Composite Materials, As Studied by Single-Fiber Push-Out Tests

2005 ◽  
Vol 81 (4) ◽  
pp. 965-978 ◽  
Author(s):  
Francis Rebillat ◽  
Jacques Lamon ◽  
Roger Naslain ◽  
Edgar Lara-Curzio ◽  
Mattison K. Ferber ◽  
...  
Keyword(s):  
Composite Materials ◽  
Bond Strength ◽  
Single Fiber ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Push Out

scholarly journals Characterisation of the Interfacial bond Strength between Glass Fibre and Epoxy Resin using the Pull-Out and Push-Out Techniques

2000 ◽  
Vol 9 (3) ◽  
pp. 096369350000900 ◽  
Author(s):  
E. Mδder ◽  
X.-F. Zhou ◽  
E. Pisanova ◽  
S. Zhandarov ◽  
S. R. Nutt
Keyword(s):  
Bond Strength ◽  
Epoxy Resin ◽  
Glass Fibre ◽  
Critical Energy ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Critical Energy Release Rate ◽  
Pull Out ◽  
Loading Patterns ◽  
Push Out

Interfacial bond strength between epoxy resin and glass fibre was studied using the pull-out and push-out techniques. For untreated fibres, these micromechanical tests gave similar values of the local interfacial shear strength and critical energy release rate. In the case of fibres treated by γ-APS, both tests showed considerable increase in the bond strength. However, for the modified fibres, the pull-out test gave greater values of both interfacial parameters than the push-out test, a result attributed to the different modes of interfacial loading. The different loading patterns also cause different failure mechanisms in these two tests.

Effect of sand grain size and sand-to-cement ratio on the interfacial bond strength of steel fibers embedded in mortars

2013 ◽  
Vol 47 ◽  
pp. 1421-1430 ◽  
Author(s):  
Seok Hee Kang ◽  
Jung Jin Kim ◽  
Dong Joo Kim ◽  
Young-Soo Chung
Keyword(s):  
Grain Size ◽  
Bond Strength ◽  
Steel Fibers ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Cement Ratio ◽  
Sand Grain Size
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