Issue 43

P. Zampieri et alii, Frattura ed Integrità Strutturale, 43 (2018) 191-204; DOI: 10.3221/IGF-ESIS.43.15 191 Investigation on the static and dynamic structural behaviors of a regional aircraft main landing gear by a new numerical methodology F. Caputo, A. De Luca, A. Greco Department of Industrial and Information Engineering, University of Campania “L. Vanvitelli”, Via Roma 29, 81031 Aversa, Italy. francesco.caputo@unicampania.it , alessandro.deluca@unicampania.it , alessandro.greco@unicampania.it S. Maietta Department of Industrial Engineering, Università degli Studi di Napoli Federico II, Naples, Italy. smaietta@unina.it A. Marro, A. Apicella Magnaghi Aeronautica, Via Galileo Ferraris, 76, 80142, Naples, Italy amarro@magnaghiaeronautica.it , aapicella@magnaghiaeronautica.it A BSTRACT . In this paper, a new methodology supporting the design of landing gears is proposed. Generally, a preliminary step is performed with simplified FE model, usually one-dimensional, to achieve the reaction forces involving each component during all aforementioned aircraft operations. Though this approach gives a valid support to the designer, it is characterized by several problems, such as the related approximations. So, it is important, by a numerical point of view, to develop an isostatic FE model equivalent to the real one. In fact, if the landing gear is modelled as hyperstatic, the static equilibrium equations are insufficient for determining the internal forces and reactions on each sub-component; so, the modelled material properties and geometries assume an increasing importance, which gets the model too approximating. The proposed methodology consists of achieving the reaction forces by means of multibody simulations, by overcoming such problems, since each component is modelled as rigid. In this paper, also a FE model for the investigation of the structural response is proposed. Aimed to Certification by Analysis purposes, the developed multibody and the FE models have been assessed against an experimental landing gear drop test carried out by Magnaghi Aeronautica S.p.A., according to the EASA CS 25 regulations. K EYWORDS . Landing gear; Multibody; FE analysis; Dynamic behaviour; Drop Test. Citation: Caputo, F., De Luca, A., Greco, A., Maietta, S., Marro, A., Apicella, A., Investigation on the static and dynamic structural behaviors of a regional aircraft main landing gear by a new numerical methodology, Frattura ed Integrità Strutturale, 43 (2018) 191-204. Received: 27.11.2017 Accepted: 05.12. 2017 Published: 01.01.2018 Copyright: © 2018 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.