Accession Number : ADA184468

Title :   Failure Analysis of Composite Structure Materials.

Descriptive Note : Final rept. 1 Oct 85-31 Aug 86,

Corporate Author : BOEING MILITARY AIRPLANE CO SEATTLE WA

Personal Author(s) : Smith,Brian ; Grove,Ray

PDF Url : ADA184468

Report Date : 27 May 1987

Pagination or Media Count : 191

Abstract : The objectives of the Failure Analysis for Composite Structural Materials program are to develop analytical and diagnostic techniques that can be used for determining the causes of failure in composite materials and to incorporate these results into a compendium of procedures that may be used as a reference manual when conducting a postfailure analysis of a composite structure, given the failed part as the starting point of the investigation. Such techniques include flowcharts describing the logical arrangement of investigative operations along with diagnostic procedures that reveal the cause and mechanism of failure. To achieve these objectives, this program was divided into five tasks: (1) task 1-literature search and diagnostic technique selection, (2) task 2-specimen production and test, (3) task 3-diagnostic technique evaluations, (4) task 4-creation of a failure analysis compendium, and (5) task 5-evaluation and demonstration of techniques. This final report summarizes the progress and findings of activities carried out for tasks 1 through 5 that identified, organized, and examined a variety of postfailure analysis methods for composite materials. Because such failures may arise from a wide variety of causes, analysis techniques examined included four basic disciplines: nondestructive evaluation (NDE), stress analysis, fractography, and materials characterization.

Descriptors :   *COMPOSITE MATERIALS, *COMPOSITE STRUCTURES, *FAILURE(MECHANICS), STRESS ANALYSIS, NONDESTRUCTIVE TESTING, FRACTOGRAPHY, LITERATURE SURVEYS, TEST AND EVALUATION, STANDARDS, VOIDS, CRACKS, FABRICATION, SPECIFICATIONS, LAMINATES, EXPOXY COMPOSITES, GRAPHITED MATERIALS, WINGS

Subject Categories : Laminates and Composite Materials
      Aircraft
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE