Reconstruction of Fiber Orientation Distribution by Observing Interference Fringe Patterns and Elliptical Marks

t h r o u g h SEM and SAM Measurement of the fiber orientation is one of the most important inspection items 2.1 Orientation of the Molding Cross to examine the shape and strength of the Section through SEM products[ll. The 3D fiber orientation has been measured by analyzing the elliptical marks of the cross section of the fiber from the photograph of the FRP. In these methods, i t is not possible to obtain the azimuth and depression angle of the 3D fiber orientation parameters[21. We propose the method measuring 3D fiber orientation from the elliptical marks and the interference fringe patterns by observing the cut section of the FRP with scanning acoustic microscopy (SAM). This proposed method makes i t possible to measure the 3D fiber orientation distribution. We show the effectiveness of this method by reconstructing fibers in the FRP.