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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 24
ADVANCES IN NON-LINEAR FINITE ELEMENT METHODS
Edited by: B.H.V. Topping and M. Papadrakakis
Paper III.1

Mode-Injection for the Analysis of through Cracks in Pressurized Fuselages

H.A.J. Knops* and E. Riks#

*MARC Analysis Research Corporation - Europe, Zoetermeer
#Faculty of Aerospace Engineering, Technical University of Delft, Delft, The Netherlands

Full Bibliographic Reference for this paper
H.A.J. Knops, E. Riks, "Mode-Injection for the Analysis of through Cracks in Pressurized Fuselages", in B.H.V. Topping, M. Papadrakakis, (Editors), "Advances in Non-Linear Finite Element Methods", Civil-Comp Press, Edinburgh, UK, pp 83-98, 1994. doi:10.4203/ccp.24.3.1
Abstract
The analysis of large through cracks in pressurized fuselages is a geometrically nonlinear problem that plays an important role in the assessment of the residual strength of such structures. The calculation of the stress intensity factors of such cracks can be carried out by several methods. Among these, the mode enrichment method has some distinctive advantages. Not only does it permit to obtain the four independent shell stress intensity factors accurately, it also offers an easy framework to obtain the so called T-stress term, a stress parameter which is believed to be of influence in the mechanism that governs crack propagation. In this paper we will focus on this enrichment method and show how it can be incorporated in a crack growth simulation technique.

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