Autor: Reymer, Piotr - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Sensitivity Analysis of the Nasgro Equation Based on the PZL-130 TC-II Orlik Trainer Aircraft Full Scale Fatigue Test
Autorzy:: Reymer, Piotr
Leski, Andrzej
Kurdelski, Marcin
Tematy:: sensitivity analysis
crack propagation
full scale fatigue test; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Powiązania:: https://bibliotekanauki.pl/articles/24201173.pdf Link otwiera się w nowym oknie
Opis:: The study investigates the sensitivity of numerical crack propagation estimations based on the Nasgro equation. The equation is widely used for crack propagation calculations since it considers the whole range of crack propagation speed from threshold to critical values of stress intensity factor range (∆K). The presented investigation is based on the actual results of the full scale fatigue test (FSFT) of the PZL-130 ‘Orlik’ TC-II aircraft. We provide a brief description of the test and the general approach followed in crack propagation estimations originally carried out after the test. The obtained results are verified in terms of variation of the input data. Overall results are compared and discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Crack Propagation Tests for Load Sequences Developed Using Different Flight Parameters of a Trainer Aircraft
Autorzy:: Reymer, Piotr
Kowalczyk, Kamil
Baran, Marta
Nowakowski, Dominik
Dziendzikowski, Michał
Leski, Andrzej
Tematy:: fatigue crack propagation
flight parameters
load sequence; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Powiązania:: https://bibliotekanauki.pl/articles/55789516.pdf Link otwiera się w nowym oknie
Opis:: Military aircraft are subjected to highly variable and unpredictable loads due to diverse mission profiles, armament configurations, and individual piloting styles. This variability complicates the definition of precise load spectra, particularly in cases where data loss occurs due to Flight Data Recorder (FDR) malfunctions or data mishandling. This paper investigates the use of different flight parameters, such as load factor (nz), barometric height (Hb), and horizontal velocity (Vp), to define load sequences for the PZL-130 “Orlik” TC-II military trainer aircraft. These sequences were then used to evaluate crack propagation using Compact Tension (CT) specimens. The results show that the incorporation of additional flight parameters improves the accuracy of crack propagation predictions when compared to direct strain measurements. This study highlights the potential of using available flight data to develop reliable load spectra for fatigue life estimation in military aircraft, even when direct load measurements are not financially feasible.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Mi-24 Helicopter Full Scale Fatigue Test Concept
Autorzy:: Reymer, Piotr
Zieliński, Wojciech
Piątkowski, Łukasz
Dziendzikowski, Michał
Kurnyta, Artur
Wrąbel, Rafał
Cichocki, Tomasz
Leśniczak, Andrzej
Kurdelski, Marcin
Dragan, Krzysztof
Tematy:: Full Scale Fatigue Test
Mi-24 helicopter; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Powiązania:: https://bibliotekanauki.pl/articles/97821.pdf Link otwiera się w nowym oknie
Opis:: This paper presents a general concept of the Full Scale Fatigue Test of the Mi-24 helicopter including the test layout and load distribution, as well as describes the milestones to be achieved. Additionally, some initial work conducted in order to determine both the mass and load distribution in the structure is described. The main goal of the test is to verify the low cycle fatigue life of the helicopter structure (fuselage, tail boom, wings and landing gear). The test will be divided into two main stages at which flight and landing loads will be applied. The authors demonstrate the general test concept, the helicopter’s structure fixture and the arrangement of the hydraulic actuators at both stages in order to achieve representative loads during the test. The proposed concept is based on AFIT’s previous experience in full scale structural testing, available literature and the experience of the test staff.
Dostawca treści:: Biblioteka Nauki

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