Evaluation of the Influence of the Diameter and Shape of Lightening Holes on Effort of Webs and Values of Critical Forces of Thin-Walled Girders

Abstract:

This article is dedicated to analysis of the impact of lightening holes (performed in the webs of girders, ribs, etc. elements of thin-walled structures) on the value of the critical forces and local effort of the material webs girders. Paper presents the results of typical analysis of two flanges thin-walled girders. Calculations was performed for one of the three most common ways of making lightening holes which differ in the way the edge of the hole shaping. Analysis includes the most common case of work of this construction type - that is the case in which the load acts in the plane of web girder. The article presents a comparison of the results of girders with holes with the results for the full girders (without holes). Particular attention was paid to the significant increase the stress concentration caused by the occurrence of holes.

• Periodical: Advanced Materials Research (Volume 1036)
• Pages: 637-641
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1036.637
• Online since: October 2014
• Authors: Jarosław Mańkowski*, Rafał Szymański
• Keywords: Finite Element Method (FEM), Lightening Holes, Tension Field, Thin Walled Girder

References

[1] Lewitowicz J., Podstawy eksploatacji statków powietrznych, Tom 1. Statek powietrzny i elementy teorii, Warszawa, Wydawnictwo Instytutu Technicznego Wojsk Lotniczych, 2001. ISBN: 83-900817-4-1.

[2] Błażewicz W., Budowa samolotów, obciążenia. Warszawa: Wydawnictwa Politechniki Warszawskiej, (1976).

[3] Mańkowski J., Wpływ pola ciągnień na obciążenia połączeń nitowych występujących w konstrukcjach cienkościennych, Warszawa, Politechnika Warszawska, 2009, rozprawa doktorska.

[4] Burdzik R., Identification of structure and directional distribution of vibration transferred to car-body from road roughness, submitted to Journal of Vibroengineering 16(1) (2014).

[5] Burdzik R., Konieczny Ł., Research on structure, propagation and exposure to general vibration in passenger car for different damping parameters, Journal of Vibroengineering 15 (4) (2013), pp.1680-1688.

[6] Kuhn P., Stresses in aircraft and shell structures. New York / Toronto / Londyn: McGraw-Hill Book Company Inc., (1956).

[7] Teisseyre J., Budowa nadwozi. Część I - obliczenia. Warszawa: Wydawnictwa Komunikacji i Łączności, (1965).

[8] Hertel H., Leichtbau flugzeuge und andere leichtbauwerke, Springer-Verlag, (1960).

[9] Dassault Systemes Simulia Corp., Abaqus Analysis User's Manual, Dassault Systemes, United States of America, (2008).