Accession Number : ADA325876

Title :   Certification of Composite Aircraft Structures Under Impact, Fatigue and Environmental Conditions. Part 2-Scale Effect in Fatigue of Composite Materials.

Descriptive Note : Final contract rept. 1 Jul 76-31 Dec 77,

Corporate Author : DREXEL UNIV PHILADELPHIA PA

Personal Author(s) : Chou, Pei C. ; Cronmen, Robert

PDF Url : ADA325876

Report Date : JAN 1978

Pagination or Media Count : 75

Abstract : The effect of size on the endurance limit of composite materials has been found to depend on the statistical scatter. For structures that can be considered as composed of a number of basic elements arranged in series, the fatigue life of the structure can be predicted if the distribution of the basic element is known. This prediction technique has been verified for graphite/epoxy structures constructed from three basic elements with central hole arranged in series and subjected to a compression loading.

Descriptors :   *FATIGUE LIFE, *STATIC TESTS, *GRAPHITE EPOXY COMPOSITES, *COMPOSITE AIRCRAFT, COMPOSITE STRUCTURES, STATISTICAL ANALYSIS, COMPRESSIVE STRENGTH.

Subject Categories : Aircraft
      Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE