Accession Number : ADA329633

Title :   Mechanics of Widespread Fatigue Damage & Life Enhancement Methodologies for Aging Aerospace Structures.

Descriptive Note : Final technical rept. 15 Apr 93-14 Dec 96,

Corporate Author : GEORGIA INST OF TECH ATLANTA COMPUTATIONAL MECHANICS CENTER

Personal Author(s) : Atluri, Satya N.

PDF Url : ADA329633

Report Date : MAY 1997

Pagination or Media Count : 333

Abstract : The major aircraft structural situation considered in this research is that of a thin skin stiffened by orthogonal frames and stringers, with the possibility of a lap joint. Effects on this situation considered in this research are: (1) impact by foreign objects, (2) fatigue damage due to repetitive loading, and (3) corrosion damage. Various theoretical models, pertaining to the response of the subject aircraft structure to these effects, have been considered: (1) the Finite Element Alternating Method (FEAM) applied to a single crack, (2) FEAM applied to Multiple Site Damage (MSD), and others. An analysis is also presented which pertains to the repair of cracks by application of a composite patch using adhesive.

Descriptors :   *COMMERCIAL AIRCRAFT, *AIRCRAFT MAINTENANCE, *CRACKING(FRACTURING), *SKIN(STRUCTURAL), AGING(MATERIALS), LIFE EXPECTANCY(SERVICE LIFE), FINITE ELEMENT ANALYSIS, DAMAGE ASSESSMENT, CRACK PROPAGATION, REPAIR, FUSELAGES, FATIGUE(MECHANICS), FLIGHT LOADS, AIRCRAFT PANELS, METAL JOINTS, AXIAL LOADS, GALVANIC CORROSION.

Subject Categories : Civilian Aircraft
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE