Fiber/epoxy interfacial shear strength measured by the microdroplet test

Kang, Soo-Keun; Lee, Deok-Bo; Choi, Nak–Sam

doi:10.1016/j.compscitech.2008.10.016

Cited by 93 publications

(61 citation statements)

References 15 publications

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“…1). Other researchers [28][29][30][31][32][33] have also reported similar results. This phenomenon indicates that some as-yet-unexplained experimental factors have not been corrected in the evaluation of IFSS.…”

Section: Introductionsupporting

confidence: 75%

Effects of thermal residual stress on interfacial properties of polyphenylene sulphide/carbon fibre (PPS/CF) composite by microbond test

Wang

Xu²,

Liu

et al. 2015

J Mater Sci

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As a result of manufacturing processes, thermal residual stresses often occur in fibre-reinforced polymer composites and affect the fibre/matrix interface properties, e.g. interfacial shear strength (IFSS), which is commonly evaluated by the microbond test. In thermoplastic matrices, thermal residual stresses can be relieved by annealing. In this study, to examine the effect of thermal residual stress on IFSS, microbond tests on both air-quenched (control) and annealed polyphenylene sulphide/carbon fibre samples are conducted. Comparing the pull-out results of the control to the annealed samples subjected to six different annealing temperatures between 80 and 230°C, it is found that the thermal residual stresses in the fibre axial and radial directions are reduced progressively below and can be neglected above 120°C. Thermal residual stresses in the fibre direction can be calculated to explain the microbond test results and construct a master curve for the IFSS. Postdebond frictional shear stresses can also be analysed in terms of the calculated fibre radial thermal residual stresses and debonded fibre morphologies.

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Section: Introductionsupporting

confidence: 75%

Effects of thermal residual stress on interfacial properties of polyphenylene sulphide/carbon fibre (PPS/CF) composite by microbond test

Wang

Xu²,

Liu

et al. 2015

J Mater Sci

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“…The modern methods, such as nanoindentation (Lee and Wang 2006) and atomic force microscopy (AFM) ), are promising with this regard. Other methods for the determination of IFSS are single fiber pull-out test (So and Young 2001;Hamoush et al 2010;Nakahara et al 2012), fragmentation test (Tripathi and Jones 1998;Zhou et al 2001;Thomsen and Charca 2011), indentation test (Lee et al 2007), microbond test (Miller et al 1987), microdroplet test (Kang et al 2009), and push-out test (Zhou et al 2001). These tests were developed mainly for reinforced composites with fibers from steel, glass, carbon, and ceramic.…”

Section: Introductionmentioning

confidence: 99%

Pull-out method for direct measuring the interfacial shear strength between short plant fibers and thermoplastic polymer composites (TPC)

Wang¹,

Tian²,

Wang³

et al. 2013

Holzforschung

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Thermoplastic polymer composites reinforced with short plant fiber are worldwide in focus of research activities. Interfacial shear strength (IFSS) is an important indicator for evaluating the bonding quality between the fiber and the matrix polymer. However, the direct measurement of IFSS is especially difficult in the case of short fibers. In the present article, a method is proposed to this purpose, which is related to the known "fiber pulling out" methodology. In the case of single bamboo fibers, the IFSS in a polypropylene (PP) matrix was on, an average, of 5 MPa, which can be considered as weak. Scanning electron microscopy images revealed a rough inner surface in PP cavities left after fiber pulling out. This is direct evidence that a mechanical interlocking mechanism is active in the interphase between the hydrophilic fibers and the hydrophobic matrix.

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“…The micro mechanical techniques available for the measurement of single fiber interfacial shear strength include a fragmentation test (Godara et al, 2010), single fiber pull-out (Nova et al, 2013), single fiber push-out test (Sharma et al, 2012), and microdroplet test (Kang et al, 2009). For the microdroplet test, the magnitude of force applied to the microdroplet during the test can be accurately measured.…”

Section: Interfacial Shear Strength Of Cnt Fiber/polymermentioning

confidence: 99%