Irkutsk National Research Technical University (IRNITU), together with PAO Yakovlev, is conducting fatigue tests of parts for the MC-21 passenger aircraft, which can directly affect the weight and service life of the airliner. The research is dedicated to studying the effectiveness of various methods of surface hardening for aluminum and titanium components.
Alexander Filippov, Deputy Head of the Strength Calculation Department at PAO Yakovlev, explained that the goal of the tests is to accurately determine how much surface hardening treatments increase the service life of MC-21 aircraft parts.
Simply put, the samples are milled, then subjected to various types of surface hardening. Then fatigue tests are carried out to determine the number of cycles until failure. After that, the number of cycles until failure of samples with and without surface hardening is compared.
Hardened elements withstand significantly more load cycles compared to conventional parts. The final data will help to more accurately calculate structural strength and improve the weight characteristics of aircraft.
Aviation blogger SkyExpert refuted the point of view that the reason for the MC-21-310's alleged 6-ton overweight was new composite wings.
It is already known that the Aeroflot group will receive the first batch of MC-21-310s. The discussion was about 200 aircraft by 2030.
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