Experimental Results of A Pull-out Test Performed with Single-and Multi-fiber Samples

摘要

Widely-used methods for characterising the fiber/matrix interface in polymeric composites are the fragmentation test and the droplet test as a special kind of the single-fiber pull-out testlA severe disadvantage of these tests in that non-realistic model samples are investigated which contain only one fiber in the matric.In order to obtain data about the effect of the different residual stress situations for fibers in such samples and in composites.pull-out tests of E-glass fibers in polystyrene and polycarbonate are performed using samples, where the investigated fiber is surrounded by O to 33 other near fibers.Neighbouring fibers can increase the pull-out forces by a factor of three and the interfacial toughnss by a factor of four.This has to be aken into account , if the tests are performed not only for comparison reasons but for measuring interface properties