ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A special specimen was created cutting a rectangular notched area from the surroundingof the upper left corner of a wide body aircraft door. Then a fatigue traction load was applied inorder to induce an MSD crack initiation and propagation. An innovative DBEM (Dual BoundaryElement Method) modelling approach was devised, capable of explicitly modelling the different testarticle layers with their rivet connections even in a 2d approach. The rivets that are close to thepropagating crack are coupled with the corresponding holes by non linear contact conditions, andthe accuracy improvements are assessed in comparison with a previous linear analysis, in whichtraction and displacements continuity conditions on the hole-rivet interface had been imposed.The importance of such influence on the simulation precision need to be assessed due to the strongimpact that a non linear analysis produces on computational times.For such a complex problem (three different panels, made of different materials, each one with avariable thickness and connected by numerous rivets), experimental crack propagation data wereavailable for the numerical-experimental comparison. With such non linear approach, a significantimprovement on the growth rate correlation is obtained, that justify the increased computationaleffort
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.593.pdf
Permalink
