Accession Number : ADA260628


Title :   Reliable Stress and Fracture Mechanics Analysis of Complex Aircraft Components Using a H-P Version of FEM


Corporate Author : AERONAUTICAL RESEARCH INST OF SWEDEN STOCKHOLM


Personal Author(s) : Andersson, Borje ; Babuska, Ivo ; Von Petersdorff, Tobias ; Falk, Urban


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260628.pdf


Report Date : Aug 1992


Pagination or Media Count : 52


Abstract : Effective approaches are developed with which complex three- dimensional components may be analyzed with a high and virtually guaranteed accuracy. The main computational tool is a h-p version of FEM practically realized with the p-version program STRIPE having a mesh generator for automatic mesh refinement at edges and vertices Use of advanced extraction methods and new theoretical approaches give exponential convergence rates for accuracies in all engineering data of interest. New methods for reliable calculation of local stresses and stress intensity data at edges and vertices to be used for fatigue dimensioning at fillets, damage tolerance assessment of three-dimensional flaws etc. are given. A complex real-life problem is reliably analyzed in order to demonstrate the practical usefulness of the procedures advocated. The technical details are given in forthcoming papers.


Descriptors :   *AIRCRAFT , *STRESS ANALYSIS , *FRACTURE(MECHANICS) , STRESSES , EDGES , INTENSITY , FUSELAGES , CONVERGENCE , TOLERANCES(MECHANICS) , STRUCTURAL COMPONENTS , SWEDEN , FATIGUE(MECHANICS) , SAFETY , THREE DIMENSIONAL , ACCURACY , FINITE ELEMENT ANALYSIS , TOOLS , DAMAGE


Subject Categories : Aircraft
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE