Menue

Publications

Authors Zhandarov, S. ; Mäder, E.
Title Estimation of the local interfacial strength parameters of carbon nanotube fibers in an epoxy matrix from a microbond test data
Date 01.05.2015
Number 45085
Abstract 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 force–displacement curve yielded very similar results. The estimated local IFSS value (about 50 MPa) is much greater than the effective IFSS reported for this fiber–matrix 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 force–displacement 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.
Publisher Carbon
Wikidata
Citation Carbon 86 (2015) 54-57
DOI https://doi.org/10.1016/j.carbon.2015.01.025
Tags

Back to list