Abstract
The machining of composite materials becomes very difficult due to the differences of properties between the reinforcing materials and matrix materials. Especially the machining an A-FRP (Aramid fiber reinforcing plastics) causes the rough machined surfaces. The surface integrities are much affected by orientation of fibers. To clarify the effect of fiber orientation on the surface appearances, we observed the deformation and fractural phenomena of Aramid fiber during machining A-FRP by microscopically. And we can make an interior deformation and fracture of fiber clear that is situated in the matrix. Further, we simulated the phenomena with a very simple model to evaluate the deformation of Aramid fiber during machining. It is based on Dr. Timoshenko's theory of beams on elastic foundation. In our analysis, the beams are regarded as Aramid fibers and the elastic foundation is regarded as matrix material. Further, the modulus of the foundation is varied to prove the orientation of fiber. The calculated results have some coincides with experimental results.
