A New Approach to Modelling and Testing the Fatigue Strength of Helicopter Rotor Blades during Repair Process

• Autorzy: Sałaciński Michał , Kowalski Rafał , Szmidt Michał , Augustyn Sławomir

Identyfikatory

DOI

10.2478/fas-2019-0006

• Języki publikacji: EN

Abstrakty

EN

The fatigue test was carried out on an element of a rotor blade removed from the Mi-2 helicopter. The purpose of the test was to check the fatigue strength of the repaired rotor blade. Metal composite rotor blades have a metal spar in the form of a box and the trailing sections in the form of metallic honeycomb sandwich panels. The trailing sections are bonded to the spar. The repair had been carried out at the point where the trailing section became debonded from the spar at the Air Force Institute of Technology in Warsaw using a methodology developed for carrying out repairs of rotor blades’ damage. All types of the Mi family helicopters are equipped with metal composite rotors blades. Depending on MTOW (Maximum Take-Off Weight) and destination of helicopters, blades differ in dimensions, but their design solutions are practically the same. For this reason, the developed repair methodology can be used for all characteristic rotor blades structures for Mi helicopters. The fatigue test was performed at the Łukasiewicz - Institute of Aviation in Warsaw, using a hydraulically driven fatigue machine. The fatigue test was carried out by performing over 1.1 million load cycles. In repair places, upon completion of fatigue testing, no damage was found.

Słowa kluczowe

EN

rotor blade; helicopter; fatigue test; repairs; bonding; composites

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2019
• Tom: Iss. 11
• Strony: 56--67
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Sałaciński Michał

• Air Force Institute of Technology, Księcia Bolesława 6, 01-494, Warsaw, Poland

autor

Kowalski Rafał

• 41st Training Air Base, Brygady Pościgowej, 08-530, Dęblin, Poland

autor

Szmidt Michał

• Łukasiewicz Research Network - Institute of Aviation, Al. Krakowska 110/114, 02-256, Warsaw, Poland

autor

Augustyn Sławomir

• Military University of Technology, gen. Sylwestra Kaliskiego 2, 00-908, Warsaw, Poland

Bibliografia

• [1] WSK -,,DELTA”: Smigłowiec MI-2 Instrukcja Eksploatacji i Obslugi Technicznej PLATOWIEC, Warsaw, 1972.
• [2] Armored Weapons Museum in Poznan: https://muzeumbronipancernej.pl/realizacja-dokumentu-o-wspolpracy-pomiedzy-slowenskim-muzeumwojskowym-pivka-a-muzeum-wojska-polskiego/ [date 05.03.2020].
• [3] Sałacinski, M., Broda, P. and Samoraj, P., (2017). The Repair Design and Technology of Metal Rotor Blades for Mi Family Helicopter – The Approach with the Usage of Reverse Engineering, SAE International.
• [4] Salacinski, M., Broda, P., Orzechowski, P. and Synaszko, P. (2016). Nowoczesne technologie napraw metalowych łopat wirników nosnych smiglowcow rodziny Mi, Final report, Warsaw.
• [5] Emetal: http://www.emetal.eu/aluminium/aluminium-EN-AW-2024-ISO_-AlCu4Mg1-EN_-AW-AlCu4Mg1-PN_-PA-7-DIN_-AlCuMg2-wnr_-3.1355/ [date 01.02.2020].
• [6] Klysz, S. (2015) Podstawy wytrzymalosci materialow, Publishing House of the Air Force Institute of Technology, Warsaw.
• [7] Sałaciński, M. and Broda, P. (2017) Nowoczesne technologie napraw metalowych lopat wirnikow nosnych smiglowcow z wykorzystaniem wloknistych kompozytow polimerowych, Final Report, Warsaw.
• [8] Edwards, P. R. and Darts, J. (1984) Standardised Fatigue Loading Sequences For Helicopter Rotors (HELIX AND FELIX) Part 1: Background and Fatigue Evaluation, Royal Aircraft Establishment, London.
• [9] Kaczmaszewski, J. (2006) Fundamentals of metal-metal adhesive joint design, Lublin University of Technology.
• [10] Rodzewicz, M. (2011) Investigation Into Fatigue Behaviour of Metal-COmposite Gleu Connection, Fatigue of Aircraft Structures, Tome 3, Warsaw, pp. 86-102.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).