CALCULATION AND EXPERIMENTAL METHOD OF STUDYING
THE STRESS-STRAIN STATE OF A FAN BLADE WHEN SIMULATING AN IMPACT WITH A BIRD 

Aleksandr R. Lepeshkin, Doctor of technical sciences, associate professor, professor of the sub-department of aviation equipment design and certification, Moscow Aviation Institute (4 Volokolamskoe highway, Moscow, Russia), lepeshkin.ar@gmail.com
Khain Myint Aung, Postgraduate student, Moscow Aviation Institute (4 Volokolamskoe highway, Moscow, Russia), aungkhinemyint22@gmail.com

Background. Damage to aircraft components due to bird strikes significantly reduces the level of flight safety in civil aviation. The most dangerous is when a bird hits an aircraft engine, so the study of bird strikes on engine parts is a pressing issue. Materials and methods. A computational and experimental method for studying the stress-strain state of a fan blade during a simulated impact with a bird is proposed. The developed method allows one to study impact processes and phenomena in engine fan blades during a simulated impact with a bird using a device with a special striker and registration systems on a special installation. Results and conclusions. The developed method allowed us to record the time sequence of events (interferogram patterns, displacements and stresses) at any time after the start of the impact using a bird simulator (special striker) and, accordingly, to obtain the results of the stress-strain state of the blade and the parameters of the impact process. Analysis of the research results using the developed method allows us to obtain a change in stresses and displacements during the impact with the bird simulator and to determine the blade sections in which maximum stresses and displacements are observed. The developed calculation and experimental method and the obtained recommendations can be used to study the non-stationary stress-strain state of fan blades and other engine parts and aircraft elements during the imitation of an impact with a bird.

computational-experimental method, computational modeling, bird simulator, fan blade, stresses, displacements, impact

Lepeshkin A.R., Aung K.M. Calculation and experimental method of studying the stress-strain state of a fan blade when simulating an impact with a bird. Nadezhnost' i kachestvo slozhnykh sistem = Reliability and quality of complex systems. 2025;(3):110–118. (In Russ.). doi: 10.21685/2307-4205-2025-3-11