Mechanical Behavior comparison of aircraft joints modeling / Comparação de comportamento mecânico da modelagem de juntas de aeronaves

Authors

  • Marco Tulio dos Santos
  • Rodrigo de Sa Martins
  • Marcelo Greco

DOI:

https://doi.org/10.34117/bjdv7n8-439

Keywords:

Hierarchical Models, Aircraft Joints, Finite Element Methods, Aircraft Fasteners.

Abstract

The procedure of structural design for aircraft parts is widely known and discussed in the academy and in the industry, although it has been improved along the time. It is based on a detailed process of aerodynamics loads study coupled or not with specifications required by regulatory agencies. Further, several interactions of analysis are done to define the critical stress state of the structure submitted to load conditions, because it is a complex structure that needs to be often improved and updated (considering the requirement of assembly/disassembly simplicity). There are several components in an aircraft attached to each other by the use of fasteners, rivets or nuts made of different materials (aluminum, steel, Inconel among others). In fact, it is not to easy to obtain stress state of the aeronautical structure for real loading conditions. Further, it is also difficult to calculate the load acting on each one of the joints. Several studies were already performed in order to obtain the correct understanding of how actual loads is distributed through the joints. The present work aims to compare results in aircraft joints (focusing in spar and skin regions), considering three levels of fidelity to understand the differences in the structural response using different type of modeling approach. Finite Element Analysis modelings made using Nastran software were performed. Preliminary results show good response agreement even for high and intermediate detail levels. Low detail level present promisor response as a tool for predesign.

References

Rutman, A., Viisoreanu, A., & Parady, J. A., 2000. Fasteners modeling for MSC.Nastran finite element analysis. SAE Technical Papers.

Askri, R., Bois, C., Wargnier, H., & Lecomte, J., 2016. A reduced fastener model using Multi-Connected Rigid Surfaces for the prediction of both local stress field and load distribution between fasteners. Finite Elements in Analysis and Design, vol. 110, pp. 32–42.

Bathe, K. J., 2016. The Mechanics of Solids and Structures - Hierarchical Modeling and the Finite Element

Solution.

Martins, R., Dos Santos, M. T., & Palma, E. S., 2018. Fastening analysis using low fidelity finite element models. 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018, , n. September, pp. 0–10.

Bedair, O. K. & Eastaugh, G. F., 2007. A numerical model for analysis of riveted splice joints accounting for secondary bending and plates/rivet interaction. Thin-Walled Structures, vol. 45, n. 3, pp. 251–258.

Chaves, C. E. & Fernandez, F. F., 2016. A review on aircraft joints design. Aircraft Engineering and Aerospace Technology, vol. 88, n. 3, pp. 411–419.

Niu, M. C. Y., 2011. Airframe Stress Analysis and Sizing (Third edition).

https://jet tek.com/, 2018. Jet-tek.

Falsone, G. & Settineri, D., 2011. An Euler-Bernoulli-like finite element method for Timoshenko beams. Mechanics Research Communications, vol. 38, n. 1, pp. 12–16.

Iscold, P. H., 2002. Introduc¸ao˜ as cargas nas aeronaves - UFMG` .

Abbott, I. & Von Doenhoff, A., 1959. Theory of Wing Sections, Including a Summary of Airfoil Data. Dover Books on Aeronautical Engineering Series. Dover Publications.

ASME, 2016. Guide for Verification and Validation in Computational Solid Mechanics.

Zarzalejos, J. M., Fernandez, E., Caixas, J., Bay´ on, A., Polo, J., Guirao, J., Garc´ ´?a Cid, J., & Rodr´?guez, E., 2014. Bolted Ribs Analysis for the ITER Vacuum Vessel using Finite Element Submodelling Techniques. Fusion Engineering and Design, vol. 89, n. 7-8, pp. 1790–1794.

Published

2021-08-18

How to Cite

dos Santos, M. T., Martins, R. de S., & Greco, M. (2021). Mechanical Behavior comparison of aircraft joints modeling / Comparação de comportamento mecânico da modelagem de juntas de aeronaves. Brazilian Journal of Development, 7(8), 82310–82320. https://doi.org/10.34117/bjdv7n8-439

Issue

Section

Original Papers