Authors
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Zhandarov, S. ; Mäder, E.
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Title
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Estimation of the local interfacial strength parameters of carbon nanotube fibers in an epoxy matrix from a microbond test data
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Date
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01.05.2015
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Number
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45085
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Abstract
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Local interfacial strength parameters (local interfacial shear strength (IFSS), critical energy release rate) and interfacial frictional stress between continuous carbon nanotube fibers and epoxy matrix have been estimated using published experimental data from a microbond test. The indirect method (from the maximum recorded force as a function of the embedded length) and the calculation from an individual forcedisplacement curve yielded very similar results. The estimated local IFSS value (about 50 MPa) is much greater than the effective IFSS reported for this fibermatrix pair (14.4 MPa).<br />Zu et al. [1] determined the effective interfacial shear strength of continuous carbon nanotube (CNT) fibers in DER 353 epoxy resin by means of a microdroplet (microbond) test. They recorded 10 forcedisplacement curves for specimens in which interfacial debonding occurred and plotted the maximum fiber axial force, Fmax, recorded during the test, as a function of the embedment area. (In Fig. 1, we replotted their data as Fmaxversus the embedded length, le). Then these data were fitted to the linear function passing through the origin (curve 1), and the average effective interfacial shear strength (IFSS) was obtained from the slope of the fitting line. The authors found the effective (apparent) IFSS value (tapp = 14.4 MPa) to be comparable to those of glass fiber/epoxy and carbon fiber/epoxy composites.
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Publisher
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Carbon
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Wikidata
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Citation
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Carbon 86 (2015) 54-57
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DOI
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https://doi.org/10.1016/j.carbon.2015.01.025
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Tags
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