Investigation of fiber/matrix adhesion: test speed and specimen shape effects in the cylinder test

Abstract

Abstract:The cylinder test, developed from the microdroplet test, was adapted to assess the interfacial adhesion strength between fiber and matrix. The sensitivity of cylinder test to pullout speed and specimen geometry was measured. It was established that the effect of test speed can be described as a superposition of two opposite, simultaneous effects which have been modeled mathematically by fitting two parameter Weibull curves on the measured datas.Effects of the cylinder size and its geometrical relation on the measured strength values have been analyzed by finite element method. It was concluded that the geometry has a direct influence on the stress formation. Based on the results achieved, recommendations were given on how to perform the novel single fiber cylinder test.

Measuring of Fiber/Matrix Adhesion in Thermoplastic Polymer Composites: A Preliminary Study

“…the uncertainty of the test is highdue to the relatively ill-defined droplet shape and to the widely varying geometrical parameters. In our earlier works [9,10] cylinder test developed form the microbond test has been introduced ( Fig. 2.…”