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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2019031636
pages 443-452

ANALYSIS OF THE BEHAVIOR OF COMPRESSED LATTICE COMPOSITE RIBS WITH INITIAL DELAMINATION

Evgenyi Arkadyevich Dubovikov
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Viktor Pavlovich Fomin
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation

ABSTRACT

A method of analyzing the nonlinear behavior of composite ribs with initial delamination based on the energy approach to solving the problem of determining the state of the rib under compression is presented. The results of the investigation of the influence of the delamination parameters on the effective stiffness of the rib, including analysis of the delamination propagation and post-buckling failure of the delaminated part of the rib, are given. The analysis of the influence of the initial delamination in ribs on the durability parameters of lattice composite fuselage sections has been performed. The computational technique for determining the critical length of the initial delamination when the airframe is designed according to the principle of fail-safe damage with retention of the required safety level is shown.

REFERENCES

  1. Shanygin, A., Basic Features of Designing Pro-Composite Structures of Aircraft, Trudy TsAGI, 2698:63-69, 2012.

  2. Fomin, V., Kondakov, I., and Shanygin, A., Designing Pro-Composite Aircraft Concepts and Layouts to Maximize Potential Benefits of High Specific Strength of CFRP, in Proc. of 28th International Congress of the Aeronautical Sciences (ICAS), CD, Brisbane, Australia, 2012.

  3. Vasiliev, V.V., Barynin, V.A., Razin, A.F., Khalimanovich, B.I., and Petrokovskii, S.A., Anisogride Composite Lattice Structures for Space Applications, in Proc. of 11th European Conference on Space Structures Materials and Mechanical Testing, CD, Toulouse, France, 2009.

  4. Advanced Lattice Structures for Composite Airframes (ALaSCA), Project Proposal FP7-AAT-2010-RTD, https://trimis.ec.europa.eu/project/production-and-analysis-evolution-lattice-related-barrel-elements-under-operations-advanced, 2010.

  5. Production and Analysis Evolution for Lattice Related Barrel Elements under Operations with Advanced Robustness (PoLaRBEAR), Project Proposal FP7-AAT-2013-RTD, https://trimis.ec.europa.eu/ project/advanced-lattice-structures-composite-airframes, 2013.


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