Accession Number : ADA305352

Title :   Nondestructive Testing of Graphite Fiber Composite Structures,

Corporate Author : MCDONNELL DOUGLAS CORP LONG BEACH CA

Personal Author(s) : Hagemaier, D. ; McFaul, H. J. ; Moon, D.

PDF Url : ADA305352

Report Date : OCT 1970

Pagination or Media Count : 11

Abstract : This paper discusses nondestructive testing (NDT) methods and techniques for detection of material and manufacturing anomalies in state-of-the-art graphite composites. Introduction of composites into large-scale production depends in large measure on the successful application of NDT for process control and monitoring. Visual, liquid-penetrant, radiographic, ultrasonic, sonic, thermal, and acoustic-emission NDT methods are used to evaluate graphite fiber composite aircraft specimens and structures. Reference standards are fabricated with built-in discontinuities, commensurate with each structural article fabricated. The test specimens and parts were tested by various methods in order to determine optimum discontinuity detection. Tests were conducted on research and development graphite composite aircraft structures consisting of (1) molded graphite flap ribs, (2) graphite composite flap assembly, and (3) graphite composite horizontal stabilizer assembly.

Descriptors :   *NONDESTRUCTIVE TESTING, *COMPOSITE STRUCTURES, *GRAPHITED MATERIALS, *COMPOSITE AIRCRAFT, ANOMALIES, MEASUREMENT, OPTIMIZATION, DETECTION, COMMERCIAL AIRCRAFT, MANUFACTURING, PRODUCTION, STATE OF THE ART, STRUCTURAL PROPERTIES, COMPOSITE MATERIALS, CARBON FIBERS, ULTRASONICS, SELF CONTAINED, STANDARDS, FLAPS(CONTROL SURFACES), ASSEMBLY, DISCONTINUITIES, MOLDINGS, ACOUSTIC EMISSIONS, RADIOGRAPHY, RIBS.

Subject Categories : Commercial and General Aviation
      Laminates and Composite Materials
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE