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Probabilistic Design of Damage Tolerant Composite Aircraft Structures

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Final rept.

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The present document describes the efforts under Memorandum of Cooperation between the Federal Aviation Administration FAA, USA, and the Central Aero-Hydrodynamic Institute TsAGI, Russian Federation. Under this effort, a methodology for calculating reliability of composite aircraft structures was developed and is contained in software Probabilistic Design of Damage Tolerant Composite Structures ProDeCompoS. In addition, background data culled from Russian usage of composite aircraft structures was compiled to use with ProDeCompoS. This includes statistical data of damage occurrence, effectiveness of repair, and test data and computational methods to determine residual strength for damaged composite laminate. The methodology and use of ProDeCompoS was demonstrated by calculating the reliability of four composite components a highly maneuverable MIG-29 fin, a transport TU-204 aileron, a business jet Lear Fan-2100 wing, and an aerobatic SU-29 wing. To evaluate the robustness of ProDeCompoS, a method to estimate of spread and confidence intervals for failure probability was developed and used in the analysis of the MIG-29 fin. The analysis showed that the reliability estimates are quite stable for the range of expected variations of input data.

Subject Categories:

  • Aircraft
  • Structural Engineering and Building Technology
  • Mechanics

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