Results 1 to 10 of about 121 (103)
Multiaxial fatigue of in-service aluminium longerons for helicopter rotor-blades [PDF]
Frattura Ed Integrita Strutturale, 2016 Fatigue cracking of longerons manufactured from Al-alloy AVT-1 for helicopter in-service rotorblades was considered and crack growth period and equivalent of tensile stress for different blade sections were estimated.
A. Shanyavskiy, A. Toushentsov
exaly +12 more sources
Investigation of cracks found in helicopter longerons [PDF]
Engineering Failure Analysis, 2010 Four cracked longerons, containing a total of eight cracks, were provided for study. Cracked regions were cut from the longerons. Load was applied to open the cracks, enabling crack surface examination. Examination revealed that crack propagation was driven by fatigue loading in all eight cases.
John A. Newman +2 more
exaly +2 more sources
Manufacturing of ultra-thin thermoplastic TRAC longerons [PDF]
Composites Part B: EngineeringDeployable composite structures such as TRAC (Triangular Rollable and Collapsible) longerons are highly attractive for large-scale space applications due to their compact stowage and passive deployment capabilities. Conventional TRAC longeron manufacturing relies on autoclave-cured thermoset composites, which limits scalability.
J Koord +2 more
exaly +3 more sources
Folding simulation of TRAC longerons via unified one-dimensional finite elements
Materials Research Proceedings, 2023 Abstract. This paper proposes a simulation of the folding phase of TRAC deployable booms using refined one-dimensional finite elements in the framework of the Carrera Unified Formulation. The mathematical model involves standard beam finite elements placed along the length of the longeron, and Lagrange polynomials as expansion functions for the cross ...
Augello R. +3 more
exaly +2 more sources
DYNAMIC MODEL OF THE TEST BENCH FOR HELICOPTER VANES LONGERONS
Advanced Engineering Research, 2007 The dynamic model of the test bench for helicopter vanes longerons are described and studied in the paper. Model was developed to determining a vibration level, which pass to ambient space.
I.V. BOGDANOVA +2 more
doaj +2 more sources
MATHEMATICAL MODEL OF FORMATION OF NOISE OF VIBROSHOCK HARDENING OF LONGERONS OF HELICOPTERS
Advanced Engineering Research, 2009 In article the mathematical model of formation of noise of the stand of vibroshock hardening of longerons of helicopters is resulted. Power methods speeds of fluctuations of separate subsystems and bearing system as a whole pay off.
S.A. SHAMSHURA +2 more
doaj +2 more sources
Advanced Engineering Research, 2009 In article the combined method of vibrating isolation and vibrating clearing on an example of the stand of vibrratsionno-shock hardening of longerons of helicopters is considered.
S.A. Shamshura
doaj +2 more sources
The crash energy absorption of the vehicles front structures [PDF]
Transport, 2003 During the frontal crash the longerons absorb most energy of all vehicles construction elements. In order to analyse the energy absorbing capabilities of longerons under axial compression loading and to evaluate the influence of longerons geometrical ...
P. Griškevičius, A. Žiliukas
doaj +3 more sources
Imrovement of the cold forming technology of the parts such as longeron [PDF]
IOP Conference Series: Materials Science and Engineering, 2014 © Published under licence by IOP Publishing Ltd. As a result of modeling in LS-PREPOST preprocessor of the program LS-DYNA a range of radii of curvature edge transition matrix (27,5 °≤ R ≤ 48 °) is obtained, which allows to produce defect-free stamping slots for longeron shock absorbers of tractors KAMAZ-5460.
Kashapova L., Pankratov D., Bilyalova A.
openaire +3 more sources
NOISE PROTECTION EQUIPMENT SYSTEM FOR CENTRIFUGING HELICOPTER SPAR TUBES
Advanced Engineering Research, 2013 The experimental results of noise and vibration in the section of the centrifugal treatment of the helicopter longeron tubes are given. Noise sources determining very high level increase over limitary spectra are identified.
Yulia Anatolyevna Proskoryakova +1 more
doaj +1 more source