Accession Number:

AD0883978

Title:

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

Descriptive Note:

Annual rept. Jun 69-Jun 70,

Corporate Author:

MCDONNELL DOUGLAS ASTRONAUTICS CO-WEST SANTA MONICA CA

Personal Author(s):

• Cook, John L.

Report Date:

1971-02-01

Pagination or Media Count:

146.0

Abstract:

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 years 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

Descriptors:

• *NONDESTRUCTIVE TESTING)
• (*REINFORCED PLASTICS
• COMPOSITE MATERIALS
• RADIOGRAPHY
• ULTRASONIC RADIATION
• REINFORCING MATERIALS
• FIBERS
• QUARTZ

Subject Categories:

• Laminates and Composite Materials
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE