Interface characterization by experimental and numerical single-fiber push-out test
Fiber reinforced polymers (FRP) due their low specific density and high strength possess a high potential for light weight construction. On the microstructural level FRP consist of fibers, the matrix and an intermediate interface. A better understanding of the fiber-matrix interface is needed to better assess overall component behaviour, to improve simulation methods and to tailor the interface and its properties.
The fiber-matrix interface is investigated experimentally and numerically by a single-fiber push-out test. The investigated material is a glass-fiber reinforced sheet-molding-compound (SMC). The experimentally determined microstructure is re-built in a FEM-simulation model. Interface parameters of a cohesive zone model are adapted to the experimental observation.
The single-fiber push-out test has the advantage that the interface can be investigated directly on the material from a component. Furthermore, the influence of surrounding fibers can be taken into account. This latter aspect is particularly important in the bundle-like microstructure of SMC.