Structural response of a blast loaded fuselage
Treść / Zawartość
The most important task in tests of resistance of aircraft structures to the terrorist threats is to determine the sensitivity of thin-walled structures to the blast wave load. For obvious reasons, full-scale experimental investigations are carried out exceptionally. In such cases numerical analyses are very important. They allow tuning modelparameters for proper correlation with experimental data. With this preliminary analysis experiment can be planned properly. The paper presents a summary of the results of numerical analysis of model of medium sizefuselage. Various manufacturing techniques are considered - the skin made of aluminum alloy (2024-T3) and the skins made of modern layered materials (GLARE) were compared. Characteristics of the materials used in FE simulations were obtained experimentally. Modelling of C4 detonation was also discussed. Studies have shown very strong sensitivity of the results to chosen numerical models of materials, formulations of elements, assumed parameters etc. Studies confirm also very strong necessity of the correlation of analysis results with experimental data. Without such a correlation it is difficult to talk about the validation of the results obtained from the "explicit" codes.
Bibliogr. 9 poz., rys.
-  Wentzel, C. M., van de Kasteele, R. M., Soetens, F., Investigation of Vulnerability of Aircraft Structure and Materials Towards Cabin Explosions, First International Conference on Damage Tolerance of Aircraft Structures, Delft 2007.
-  Kotzakolios, T., Blast response of flat panels, EU Project VULCAN: AST5-CT-2006-031011, VULCAN Deliverable D2.1, Patras 2007.
-  Moon, Y., Bharatram, G., Schimmels, S., Venkayya, V., Vulnerability and Survivability Analysis of Aircraft Fuselage Subjected to Internal Detonations, MSC World Users' Conference, 1995.
-  Ashley, S., Safety in the sky: Designing bomb-resistant baggage containers, Mechanical Engineering, June 1992, pp. 81-84.
-  Soutis, C., Computational Simulation of blast effects on flat panels, EU Project VULCAN: AST5-CT-2006-031011, VULCAN 24m Meeting, Barcelona 2008.
-  LS-Dyna V971, Livermore Software Technology Corporation, Livermore 2006.
-  Cieśla, P., Krzemień-Ojak, P., Flight pre-stress loading of scaled fuselage, EU Project VULCAN: AST5-CT-2006-031011, VULCAN Deliverable D3.1, Warszawa 2008.
-  Schweizerhof, K., Weimar, K., Münz, Th., Rotter, Th., Crashworthiness Analysis with Enhanced Composite Material Models in LS-DYNA – Merits and Limits, LS-DYNA World Conference, Detroit, Michigan 1998.
-  Włodarczyk, E., Wstęp do mechaniki wybuchu, PWN, Warszawa 1994.