Safety Assessment of Aircraft Fuel Tank Access Cover under the Impact Load by Tire Fragments

Shile Yao, Zhufeng Yue, Xiaoliang Geng, Peiyan Wang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

According to relevant airworthiness standards, the aircraft fuel tank access cover must withstand the impact by tire fragments, and minimize the penetration and deformation, which is critical for flight safety. To assess the safety of an aircraft fuel tank access cover subjected to tire fragments, a study of dynamic response was presented in this paper using the Finite element (FE) software ANSYS/LS-DYNA. To obtain the reliable mechanical characteristics of tire tread rubber, a series of material tests have been conducted. Then the proposed rubber material model is validated by comparing the numerical simulations with the experimental results of aluminium alloy plate impact. The simulation results indicate that the rubber fragment and alloy plate will undergo the largest deformation when impact angle is equal to 90°. Finally, the proposed FE model and modelling approaches are extended to the numerical simulation of a full-scale aircraft fuel tank access cover impact. The numerical simulations are carried out with impact velocity of 71.1 m/s and impact angle of 40.5°. The simulation results indicate that the aluminium alloy by precision casting is more likely to rupture, and the middle region of the access cover is vulnerable to fragment impact. This research proposes a reliable rubber model applying to various strain rates. Considering the influence of impact regions, the dynamic response and various failure patterns of fuel tank access cover are acquired. The findings of this paper can be used to improve the future aircraft safety design.

Original languageEnglish
Article number14
JournalChinese Journal of Mechanical Engineering (English Edition)
Volume32
Issue number1
DOIs
StatePublished - 1 Dec 2019

Keywords

  • Aircraft fuel tank access cover
  • Dynamic response
  • Impact
  • Safety
  • Tire fragment

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