A method for the compensation of the effects of surface cloth impressions on polar backscatter applied to porous epoxy and biaxial graphite/epoxy compositesThe anisotropy of polar backscatter from graphite/epoxy composites is a potentially useful parameter for the characterization of porosity levels. However, the effects of release-cloth impressions on measured integrated polar backscatter levels are sufficient to inhibit the detection of porosity with this method. Recently, we developed a theoretical model to predict the frequency distribution of the backscattered power along the high-symmetry directions of release-cloth impressions. This study investigates experimentally the usefulness of limiting the bandwidth to regions not dominated by the scattering from the surface impressions, hence increasing the probability of detecting flaws such as porosity.
Document ID
19930068188
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Madaras, Eric I. (NASA Langley Research Center Hampton, VA, United States)
Bridal, S. L. (NASA Langley Research Center Hampton, VA, United States)
Holland, Mark R. (NASA Langley Research Center Hampton, VA, United States)
Handley, Scott M. (NASA Langley Research Center Hampton, VA, United States)
Miller, James G. (Washington Univ. Saint Louis, MO, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Subject Category
Quality Assurance And Reliability
Meeting Information
Meeting: Ultrasonics International ''93 Conference and Exhibition