Abstract
A series of 2-dimentionally randomaramid short fiber (AsF) FRP laminates have been prepared with a range of fiber fraction volume by reinforcing unsaturated polyester (UP) resin with aramid short fiber (3mm) sheets . Tensile, compressive and three-point bending test of aramid short fiber FRP laminates have been performed to study the mechanical behaviour on the fracture energy of the materials. It is expected that mechanical properties of the laminate may be much improved than directly reinforced FRP composite. On the other hand, its compressive strength is still unsolved. And the compressive destructed behavior is still not made clear even now. Originally, the difference between tensile strength and compressive strength is caused by the difference between their destructive mechanisms. The destruction will be completed in only a moment. It is difficult to get a detailed observation on the process of destruction because of the influence of test jig. And up to now, the reliable value of fracture energy of aramid short fiber FRP laminates has not been gotten. Therefore, we served our purpose of the research as the effect of fracture behaviour on the energy absorption properties of aramid short fiber sheet FRP laminate. Reasonable agreement has been achieved between the predictions and available experimental data.
