Investigation of interface characteristics of single fiber model composites
In the last decade several micromechanical measuring stations have been developed and set up to investigate the interface characteristics between fiber and matrix in composite materials. The experiments include quasistatic and high-speed pull-out tests, hysteresis and long-term loading tests as well as subcritical dynamic loading tests. In most cases, glass, carbon or aramid fibers embedded in a polymeric or cementitious matrix are used. The sample preparation equipment has also been developed at the IPF and is described in Fiber embedding. The principle setup of the experiments is shown in the adjacent picture. The vessel with matrix and embedded fiber is clamped on an actuator that generates the displacement. The fiber end protruding out of the matrix is glued on a mandrel that is fixed at a load cell. The equipment is specified by the experimental demands. A survey of the different methods is given in the table below.