Development of Nondestructive Test Techniques for Multidirectional Fiber-Reinforced Resin Matrix Composites.

摘要

The first year of effort on a two year duration program was designed to nondestructively evaluate as-woven multidirec-tional quartz yarn reinforcement material processed through impregnation and cure cycles,and make preliminary nondes- tructive assessment of the cured composite materials. Both film and television imaging X-ray techniques were employed on both the as-woven reinforcement and the impregnated and cured composite. Nuetron radiography with doped and undoped cured composite specimens was conducted and conducted and evaluated as compared to conventional X-ray radiography. The cured composite was also evaluated using sound velocity through the thickness,ultrasonic pulse-echo techniques,and ultra-sonic through transmission attentuation C-scan mapping. The results of the first year's effort indicate significant advancement in the application of current state-of-the-art nondestructive techniques. Both X-ray and ultrasonic tech-nuques can be used effectively to assess material variability and discrete irregularities in the material. (Author-PL)