Determining the interfacial shear strength in the presence of transcrystallinity in composites by the ‘single-fibre microcomposite compressive fragmentation test’

1997 ◽  
Vol 4 (4) ◽  
pp. 197-207 ◽  
Author(s):  
Jonathan R. Wood ◽  
Gad Marom
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Single Fibre ◽  
Interfacial Shear ◽  
Fragmentation Test

scholarly journals Interfacial Shear Strength of Kenaf Single Fibre Reinforced Polyester Matrix: Observation of Fibre Fracture and Matrix Debonding

2019 ◽  
Vol 7 (4.14) ◽  
pp. 444
Author(s):  
M. N. Zakaria ◽  
A. Crosky ◽  
A. Beehag
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Single Fibre ◽  
Interfacial Shear ◽  
Fibre Bundles ◽  
Fibre Fracture ◽  
Fragmentation Test ◽  
Kenaf Fibre ◽  
Polyester Matrix ◽  
Single Fibres

This paper describes an analysis of the parameters that affect the interfacial properties of kenaf fibre reinforced with polyester matrix. Kenaf fibre bundles were subjected to water treatment through soaking and ultrasonication technique. The specimens of dumbbell shape were fabricated containing kenaf single fibres embedded in polyester matrix. The interfacial shear strength was determined through single fibre fragmentation test. This test was used as a means of investigation, and the observation of fibre fracture and matrix debonding was done using ligt microscope equipped with polarizer light.  

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.

The Reliability of Fragmentation Test

2006 ◽  
Vol 312 ◽  
pp. 155-160
Author(s):  
Ying Dai ◽  
Xing Ji ◽  
Lin Ye ◽  
Yiu Wing Mai
Keyword(s):  
Shear Strength ◽  
Failure Modes ◽  
Interfacial Shear Strength ◽  
Stress Singularity ◽  
Singularity Analysis ◽  
Interfacial Shear ◽  
Matrix Cracking ◽  
Fragmentation Test ◽  
Matrix Cracks ◽  
Fiber Breaks

The single fiber fragmentation test has been continuously used to determine the interfacial shear strength. However, the results of the tests were still suspected by some researchers. To evaluate the reliability of the fragmentation test, the stress singularity near the interface end of fragmentation is investigated. According to the local failure modes near the interface end of a fiber fragment, there are three cases of the interface end conditions to be considered for the fragmentation tests: (A) fiber breaks only, without matrix cracking and de-bonding, (B) fiber breaks and matrix cracks, without interface de-bonding, (C) fiber breaks and interface de-bonds, with or without matrix cracking. After the singularity analysis of stress field near the interface end was depicted, it is obvious, that the interfacial shear strength given by the fragmentation test is not proper, because of that a stress singularity exists near the interface end.

scholarly journals A novel approach to functionalise pristine unsized carbon fibre using in situ generated diazonium species to enhance interfacial shear strength

2015 ◽  
Vol 3 (7) ◽  
pp. 3360-3371 ◽  
Author(s):  
L. Servinis ◽  
L. C. Henderson ◽  
L. M. Andrighetto ◽  
M. G. Huson ◽  
T. R. Gengenbach ◽  
...  
Keyword(s):  
Shear Strength ◽  
Carbon Fibre ◽  
Interfacial Shear Strength ◽  
Single Fibre ◽  
Interfacial Shear ◽  
Carbon Fibres ◽  
Novel Approach ◽  
Fibre Composites

An in situ diazonium grafting methodology was used to decorate the surface of carbon fibres with pendant amines. This methodology was shown to greatly affect IFSS in single fibre composites.

scholarly journals Micromechanical Tests on Natural Fibre Composites with Enzymatically Enhanced Fibre–Matrix Adhesion

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Hanna M. Brodowsky ◽  
Anne Hennig
Keyword(s):  
Shear Strength ◽  
Single Fibre ◽  
Natural Fibre ◽  
Interfacial Shear ◽  
Frictional Stress ◽  
Reinforced Composites ◽  
Fragmentation Test ◽  
Fibre Pullout ◽  
Fibre Matrix ◽  
Fibre Reinforced Composites

Abstract Natural fibre–reinforced composites are more sustainable than other composites with respect to the raw materials. Their properties are attractive due to high specific properties, and especially so wherever high damping is valued. As the interphase between fibre and matrix is the region of highest stresses, a strong bond between fibre and matrix is essential for any composites’ properties. The present study compares two methods of determining the interfacial shear stress in natural fibre–reinforced composites: the single fibre fragmentation test and the single fibre pullout test. The studied composites are flax fibre reinforced epoxy. For a variety of fibre–matrix interaction, the fibres are treated with a laccase enzyme and dopamine, which is known to improve the fibre–matrix shear strength. In the observed samples, single fibre fragmentation test data, i.e. of fracture mode and fragment length, scatter when compared to pullout data. In single fibre pullout tests, the local interfacial shear strength showed a 30% increase in the laccase-treated samples, compared to the control samples. The method also permitted an evaluation of the frictional stress occurring after surface failure.

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