Accession Number : ADA322102

Title :   Sensitivity Study of an AMRL Finite Element Model of the F-lll Lower Wing Skin Structural Detail at Forward Auxiliary Spar Station (FASS) 281.28.

Descriptive Note : Technical note,

Corporate Author : DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)

Personal Author(s) : Keeley, D. ; Callinan, R. ; Sanderson, S.

PDF Url : ADA322102

Report Date : SEP 1996

Pagination or Media Count : 29

Abstract : A baseline three-dimensional Finite Element (FE) model has been developed for a structural detail on an F-111 lower wing skin at Forward Auxiliary Spar Station (FASS) 281.28. This location has been the site of cracking in both RAAF and USAF aircraft The FE model was developed using precise thickness measurements appropriate for a specific full-scale test wing available at AMRL (serial number A-10-824). This document is a sensitivity study of the finite element model. The effects of small dimensional changes falling within the range of the manufacturing tolerances are investigated. This will allow a quantitative assessment of the stress variations which could be expected at that location within the F-111 fleet.

Descriptors :   *JET FIGHTERS, *WINGS, *SKIN(STRUCTURAL), *SPARS, TEST AND EVALUATION, MATHEMATICAL MODELS, STATIONS, MEASUREMENT, THICKNESS, AUXILIARY, FORWARD AREAS, MANUFACTURING, SIZES(DIMENSIONS), FINITE ELEMENT ANALYSIS, CRACKS, SITES, SENSITIVITY, THREE DIMENSIONAL, BASE LINES, PRECISION, TOLERANCES(MECHANICS).

Subject Categories : Attack and Fighter Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE