30.12.2011

Composite wing tests confirm strength characteristics

TsAGI has completed strength testing on the prototype of a wing caisson. The research was carried out on behalf of ZAO AeroComposit as part of work on the future MS-21 medium- and long-haul plane.

The static tests completed a range of strength testing and determined the load limit for this prototype of the wing caisson. In one of the most important tests, extreme stress was applied to the prototype model, and destruction occurred in the expected range.

At previous stages, frequency and stiffness tests were also successfully carried out on the caisson prototype, during which defects and damage that might possibly arise during production and operation were artificially applied to the prototype.

The studies confirmed the compliance of the design models and parameters of the caisson, incorporated during the design phase. The data obtained will be used for the further design of the MS-21. The measurements received will expand the database for subsequent certification and operation of composite constructions, taking into account controlled impact damages.

According to TsAGI Aircraft Strength Complex Director Mikhail Zichenkov, the tests produced important information to improve testing procedures for large composite power structures. “The unique features of the TsAGI aircraft strength testing complex made it possible to carry out this difficult and labor-intensive research to the highest modern standards,” Zichenkov said.

TsAGI has currently begun work on preparing for resource testing of the next prototype of the composite wing caisson. The entire theoretical and experimental research complex aims to ensure the safety of composite wing aircraft in terms of strength, aero-elasticity and service life.