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Tytuł:
A FCG Model and the Graphical User Interface Under Matlab for Predicting Fatigue Life: Parametric Studies
Autorzy:
Kebir, Tayeb
Correia, José A.F.O.
Benguediab, Mohamed
Imad, Abdellatif
Powiązania:
https://bibliotekanauki.pl/articles/2105193.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
fatigue life prediction
Graphical User Interface
fatigue crack growth
cyclic hardening
Paris
Walker
Forman
Opis:
The focus of this research work was predicting the fatigue life of mechanical components used for industrial and transport systems. To understand how the phenomenon of fatigue occurs in a material, the fatigue crack growth is studied. The purpose of this work was to create a graphical user interface (GUI) under Matlab to allow researchers to conduct the parametric studies of fatigue crack propagation to predict fatigue life. In this work, three models for fatigue crack propagation were used: those of Paris, Walker and Forman in order to study the three parameters: the Paris exponent m, load ratio R and hardness KIC, respectively. In addition, a novel model FCG was developed to study the influence of the hardening parameters (K′, n′) on fatigue crack propagation. The comparison of the simulation results with those in the literature shows good agreement.
Źródło:
Fatigue of Aircraft Structures; 2021, 13; 116--139
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Model for Fatigue Crack Growth in the Paris Regime under the Variability of Cyclic Hardening and Elastic Properties
Autorzy:
Kebir, T.
Benguediab, M.
Imad, A.
Powiązania:
https://bibliotekanauki.pl/articles/97819.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
cyclic plastic strain
elastic properties
cyclic hardening parameters
Young's modulus
variability
crack tip
fatigue crack growth
constants of the Paris law
Al-alloys
Opis:
Over the last 60 years, several models have been developed governing different zones of fatigue crack growth from the threshold zone to final failure. The best known model is the Paris law and a number of its based on mechanical, metallurgical and loading parameters governing the propagation of cracks. This paper presents an analytical model developed to predict the fatigue crack propagation rate in the Paris regime, for different material properties, yield strength (σy), Young’s modulus (E) and cyclic hardening parameters (K’, n’) and their influence by variability. The cyclic plastic deformation at a crack tip or any other cyclic hardening rule may be used to reach this objective, for to investigate this influence, these properties of the model are calibrated using available experimental data in the literature. This FCGR model was validated on Al-alloys specimens under constant amplitude load and shows good agreement with the experimental results.
Źródło:
Fatigue of Aircraft Structures; 2017, 9; 117-135
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A non-local fatigue crack growth model and its experimental verification
Nieokalny model wzrostu szczeliny zmęczeniowej i jego doświadczalna weryfikacja
Autorzy:
Seweryn, A.
Tomczyk, A.
Mróz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/280668.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
fatigue
damage accumulation
crack propagation
Opis:
The present paper is concerned with the modelling of fatigue crack initiation and propagation by applying the non-local critical plane model, proposed by Seweryn and Mróz (1996, 1998). Using the linear elastic stress field at the front of a crack or sharp notch, the damage growth on a physical plane is specified in terms of mean values of the stress and strength function. The model is applied to study crack propagation under cyclically varying tension-compression conditions. The predictions are compared with experimental data.
Praca dotyczy modelowania inicjacji i propagacji szczeliny zmęczeniowej przy wykorzystaniu nielokalnego podejścia związanego z płaszczyzną krytyczną (Seweryn i Mróz, 1996, 1998). Wykorzystując liniowo sprężyste pola naprężeń przed wierzchołkiem szczeliny opisano kumulację uszkodzeń i wzrost szczeliny na płaszczyźnie fizycznej. Do rozważań przyjęto uśrednioną w strefie kumulacji uszkodzeń miarę uszkodzeń oraz uśrednione naprężenia. Wyniki obliczeń numerycznych porównano z wynikami badań doświadczalnych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2004, 42, 1; 69-82
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A risk assessment method of aircraft structure damage maintenance interval considering fatigue crack growth and detection rate
Autorzy:
Zhang, Zhuzhu
Mao, Haitao
Liu, Yulin
Jiao, Peng
Hu, Wenlin
Shen, Pei
Powiązania:
https://bibliotekanauki.pl/articles/24200796.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
Monte Carlo
risk assessment
maintenance interval
crack propagation
detection rate
condition based maintenance
Opis:
The accurate assessment of aircraft structure damage risk is the premise of establishing reasonable, economic and reliable maintenance intervals. While many studies have proposed damage risk assessment methods for aircraft structures, these methods lack the quantification of risk. This paper proposed a risk assessment method of aircraft structure damage maintenance interval considering fatigue crack growth rate and crack detection rate. The damage process of aircraft structure was simulated by Monte Carlo simulation to realize the quantitative assessment of aircraft structure damage risk and maintenance interval. Taking an aircraft fleet as an example, the damage risk of its wing structure was simulated and analyzed. The results show that if the risk is controlled within a reasonable range, the maintenance interval should be shortened to 16 flight hours. At the same time, through the analysis of the risk classification standard and the crack detection rate, the quantitative evaluation of the risk classification standard was realized.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 1; art. no. 3
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza rozwoju małych pęknięć zmęczeniowych od otworu oraz mikromechanizm pękania platerowanej blachy stopu aluminium 2024-T3
Analysis of fatigue small crack growth from a hole and micromechanism of fracture for 2024-T3 Alclad aluminium alloy sheet
Autorzy:
Kocańda, D.
Hutsaylyuk, V.
Hlado, V.
Powiązania:
https://bibliotekanauki.pl/articles/211064.pdf
Data publikacji:
2007
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
stop aluminium
małe pęknięcia zmęczeniowe
prędkość zmęczeniowego pękania
mechanizm pękania
aluminium alloy sheet
fatigue small crack
crack growth rate
mechanism of cracking
Opis:
Zbadano powstawanie i rozwój małych pęknięć zmęczeniowych propagujących od otworu w obustronnie platerowanej blasze lotniczego stopu aluminium 2024-T3 przy stałoamplitudowym jednostronnym zginaniu (R=0,1). Badania początkowego okresu rozwoju pęknięć przeprowadzone za pomocą mikroskopu SEM pozwoliły ustalić miejsce inicjacji pęknięcia i mikromechanizm pękania blachy aluminiowej. Rozwój pęknięć na powierzchni próbek wyciętych z blachy rejestrowano metodą replik. Wykazano duży rozrzut prędkości pękania w przedziale rozwoju małych powierzchniowych pęknięć, który w blachach o grubości 3 mm sięga do 0,5 mm.
The paper deals with mechanism of small crack initiation and growth from a central hole for 2024-T3 Alclad aluminium alloy sheet under cyclic constant amplitude bending (R=0,1). It was established for 3-mm-thick sheet that surface short cracks do not exceed the length of 0,5 mm. Fatigue lifetime that corresponds to this crack length covers 20-25% of total lives of the specimens. The range of crack length was estimated for mechanistically small crack too. The microfacture analysis, made by using SEM microscope, revelated that in cladded sheet the crack source is located beneath a thin Alclad layer at the border with the matrix material. The quasi-cleavage mechanism of cracking was found in the spot of crack initiation as well as in the vicinity of the crack source and in the Alclad layer. This microfracture analysis revealed a complex shape of a crack head in a thin sheet as well.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2007, 56, 4; 37-53
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of fatigue crack growth in ship structural details
Autorzy:
Leheta, H. W.
Elhewy, A. M. H.
Younes, H. A.
Powiązania:
https://bibliotekanauki.pl/articles/259607.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
fatigue crack
linear elastic fracture mechanics (LEFM)
finite element method (FEM)
Opis:
Fatigue failure avoidance is a goal that can be achieved only if the fatigue design is an integral part of the original design program. The purpose of fatigue design is to ensure that the structure has adequate fatigue life. Calculated fatigue life can form the basis for meaningful and efficient inspection programs during fabrication and throughout the life of the ship. The main objective of this paper is to develop an add-on program for the analysis of fatigue crack growth in ship structural details. The developed program will be an add-on script in a pre-existing package. A crack propagation in a tanker side connection is analyzed by using the developed program based on linear elastic fracture mechanics (LEFM) and finite element method (FEM). The basic idea of the developed application is that a finite element model of this side connection will be first analyzed by using ABAQUS and from the results of this analysis the location of the highest stresses will be revealed. At this location, an initial crack will be introduced to the finite element model and from the results of the new crack model the direction of the crack propagation and the values of the stress intensity factors, will be known. By using the calculated direction of propagation a new segment will be added to the crack and then the model is analyzed again. The last step will be repeated until the calculated stress intensity factors reach the critical value.
Źródło:
Polish Maritime Research; 2016, 2; 71-82
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the strip yield model to crack growth predictions for structural steel
Zastosowanie modelu pasmowego płynięcia do prognozowania wzrostu pęknięć zmęczeniowych z stali konstrukcyjnej
Autorzy:
Skorupa, M.
Machniewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/140310.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wzrost pęknięć zmęczeniowych
model prognostyczny
obciążenia zmiennoamplitudowe
stal konstrukcyjna
fatigue crack growth
prediction model
variable amplitude loading
structural steel
Opis:
A strip yield model implementation by the present authors is applied to predict fatigue crack growth observed in structural steel specimens under various constant and variable amplitude loading conditions. Attention is paid to the model calibration using the constraint factors in view of the dependence of both the crack closure mechanism and the material stress-strain response on the load history. Prediction capabilities of the model are considered in the context of the incompatibility between the crack growth resistance for constant and variable amplitude loading.
Opracowany przez Autorów model pasmowego płynięcia został zastosowany do prognozowania rozwoju pęknięć zmęczeniowych obserwowanych w badaniach zmęczeniowych próbek ze stali konstrukcyjnych w warunkach obciążeń stało- i zmiennoamplitudowych. Skoncentrowano się głównie na kalibracji modelu przy użyciu odpowiednio dobranych współczynników skrępowania uwzględniających zarówno mechanizm zamykania się pęknięcia jak i naprężeniowo-odkształceniową charakterystykę materiału właściwą dla danej historii obciążenia. Wyniki prognoz przy użyciu tak skalibrowanego modelu zostały poddane gruntownej ocenie z uwzględnieniem różnic w rozwoju pęknięć obserwowanych w przypadku obciążeń stało- i zmiennoamplitudowych.
Źródło:
Archive of Mechanical Engineering; 2010, LVII, 1; 5-20
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing surface fatigue crack growth in railway wheelset axle
Autorzy:
Rudavskyi, D. V.
Kaniuk, Yu. I.
Duriagina, Z. A.
Kulyk, V. V.
Shefer, M. S.
Dolinska, I. Ya.
Powiązania:
https://bibliotekanauki.pl/articles/1818483.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
fatigue crack growth
mixed mode
railway axles
stress intensity factor
estimation model
wzrost pęknięć zmęczeniowych
tryb mieszany
osie kolejowe
współczynnik intensywności naprężeń
model szacowania
Opis:
Purpose: The aim of the proposed research is to create a calculation model of surface fatigue crack growth at the axle of railway wheelset working under operational loads. Design/methodology/approach: The energy approach of the fracture mechanics was used to formulate the calculation model of fatigue crack propagation at the wheelset axle surface. The method of least squares was used to determine the investigated material mechanical constants that the kinetic equations of the calculation model contain. The system of differential equations of crack growth kinetics was solved numerically using the Runge-Kutta method. Findings: On the basis of the energy approach of the fracture mechanics the calculation model of fatigue macrocrack growth in three-dimensional elastic-plastic body in case of a mixed-mode I+II+III macromechanism of fracture has been built. On the basis of the created calculation model, the kinetics of the growth of fatigue cracks was investigated both in the middle part of the wheelset axle and in the axle journal. Research limitations/implications: The results obtained on laboratory specimens should be tested during a real railway wheelset axle investigation. Practical implications: The created calculation model can be used in practice to formulate method of residual lifetime estimation of railway wheelset axle. Originality/value: It was shown, that surface crack kinetics depends not only on the crack initial area but also significantly depends on the crack edge geometry and comparatively small crack-like defects at the wheelset axle surface can reach critical sizes in comparatively short run. It has been found that mechanical shear stresses caused by the weight of the loaded railway wagon in the cross section of the wheelset axle journal can significantly accelerate the growth of the transverse fatigue crack at the axle surface, reducing the period of crack subcritical growth by about 20%.
Źródło:
Archives of Materials Science and Engineering; 2020, 106, 2; 59--67
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wzrostu pęknięć zmęczeniowych w spawanych próbkach poddanych zginaniu
Test of fatigue crack growth in welded specimens subjected to bending
Autorzy:
Lewandowski, J.
Rozumek, D.
Hepner, M.
Powiązania:
https://bibliotekanauki.pl/articles/211286.pdf
Data publikacji:
2018
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
złącza spawane
długości pęknięć zmęczeniowych
liczba cykli
zginanie
mikrostruktura
welded joints
fatigue cracks length
number of cycles
bending
microstructure
Opis:
W pracy przedstawiono wyniki badań wzrostu pęknięć zmęczeniowych próbek poddanych cyklicznemu zginaniu przy stałej amplitudzie momentu, wykonanych ze stali S355 z pachwinowymi spoinami. Badane próbki posiadały koncentratory naprężenia w postaci zewnętrznych, dwustronnych łagodnych karbów. Badania przeprowadzono przy stałej wartości współczynnika asymetrii cyklu R = -1 bez obróbki cieplnej i po takiej obróbce. W artykule zaprezentowano również wyniki badań mikrostruktury złączy spawanych z uwzględnieniem zmian zachodzących w materiale po obróbce cieplnej oraz wpływ tych zmian na trwałości zmęczeniowe próbek.
The paper presents the test results on the fatigue crack growth under cyclic bending specimens at constant moment amplitude made of S355 steel with fillet welds. Plane specimens with stress concentrators in form of the external two-sided blunt notches were tested. The tests were performed under constant value of the stress ratio R = -1 without and after heat treatment. The article also presents the test results of the microstructure of welded joints taking into account changes in the material after heat treatment and the impact of these changes on the fatigue life of specimens.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2018, 67, 1; 185-195
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Capacity of Fractographic Analysis for Load-Time History Reconstruction and Fatigue Crack Growth Rate Estimation for the 2024-T3 Aluminium Alloy
Autorzy:
Bogdanowicz, Z.
Kocańda, D.
Torzewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/97833.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Opis:
The subject of the paper is the considerations for the feasibility of load time history reconstruction on the basis of microfracture analysis for a failed component made of 2024-T3 aluminium alloy that operates under variable amplitude loading. For this goal three different variable amplitude load sequences with single and multiple overloads and underloads were applied to investigate crack growth rate and to examine the images of fatigue striations on the fracture surface of a component. These loads are employed when simulating the fatigue crack behaviour in aeronautical alloys. Microfracture analysis was also used either for learning the interaction of variable amplitude loading for crack growth rate in 2024-T3 alloy or for establishing the relation between surface crack and crack depth growth.
Źródło:
Fatigue of Aircraft Structures; 2009, 1; 20-36
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of bayesian and other approaches to the estimation of fatigue crack growth rate from 2D textural features
Autorzy:
Mojzeš, M.
Kukal, J.
Lauschmann, H.
Powiązania:
https://bibliotekanauki.pl/articles/279255.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
quantitative fractography
optimization
heuristic
linear regression
sub-model selection
Opis:
The fatigue crack growth rate can be explained using features of the surface of a structure. Among other methods, linear regression can be used to explain crack growth velocity. Nonlinear transformations of fracture surface texture features may be useful as explanatory variables. Nonetheless, the number of derived explanatory variables increases very quickly, and it is very important to select only few of the best performing ones and prevent overfitting at the same time. To perform selection of the explanatory variables, it is necessary to assess quality of the given sub-model. We use fractographic data to study performance of different information criteria and statistical tests as means of the sub-model quality measurement. Furthermore, to address overfitting, we provide recommendations based on a cross-validation analysis. Among other conclusions, we suggest the Bayesian Information Criterion, which favours sub-models fitting the data considerably well and does not lose the capability to generalize at the same time.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1269-1278
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion Fatigue Crack Growth Studies on Pressure Vessel and Piping Steels in Water Environment
Autorzy:
Mathew, N. M.
Vishnuvardhan, S.
Raghava, G.
Santhi, A. S.
Powiązania:
https://bibliotekanauki.pl/articles/356301.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fatigue crack growth
corrosion fatigue
ESE(T) Specimen
SA 333 Gr.6 steel
SA 516 Gr.70 steel
Opis:
Corrosion fatigue crack growth studies were conducted on eccentrically-loaded single edge notch tension specimens made of SA 333 Gr. 6 and SA 516 Gr. 70 carbon steels in water environment. The experiments were conducted using a ±250 kN capacity Universal Testing Machine under constant amplitude sinusoidal loading at a test frequency of 0.50 Hz and stress ratio of 0.1. The fabrication of test specimens and the experiments were carried out based on ASTM E 647 and ASTM E 1820. The crack initiation and growth were monitored and images were captured by using a digital camera at regular intervals of fatigue cycles. By using these images, the length of crack was measured. The tests were terminated when the uncracked portion of the specimens was insufficient to take further load. Crack growth rate and stress intensity factor range values were evaluated at incremental values of loading cycles and crack length. Using the crack growth rate vs. stress intensity factor range plots, best fit curves following power law in the form of Paris’ equation were obtained.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1857-1862
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion fatigue crack propagation rate characteristics for weldable ship and offshore steels with regard to the influence of loading frequency and saltwater temperature
Autorzy:
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/259716.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
corrosion fatigue
crack growth rate
crack length
saltwater temperature
frequency effect
ship and offshore steels
Opis:
After Vosikovsky (1975), the corrosion fatigue crack growth rate (CFCGR) characteristics have been divided into three regions. The region-III rates are very close to mechanical fatigue crack growth rates. CFCGR formulae, including the long-crack length effect (in region I only), the loading frequency effect (in region II only), and the saltwater temperature effect, have been proposed. It has been assumed that CFCGR is proportional to f –k, where f is the loading frequency and k is a constant. The averaged k-value for all steels of yield stress (YS) below 500 MPa, usually with ferrite-pearlite microstructures, is higher than that for YS > 500 MPa, usually with quenched and tempered microstructures. The temperature effect does not appear in region I below room temperature. In the remaining cases, that is, in region I for elevated temperatures and in region II for both low and elevated temperatures, the CFCGR increases with increasing temperature. Under a potential of –0.8 V, a long-crack-length effect, qualitatively similar to analogous effect for free corrosion conditions, appears.
Źródło:
Polish Maritime Research; 2017, 1; 88-99
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crack Growth Analysis of the Landing Gear Pull Rod of the Fighter Jet Aircraft
Autorzy:
Kurdelski, M.
Leski, A.
Powiązania:
https://bibliotekanauki.pl/articles/97773.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
crack growth
fatigue
flight tests
landing gear
Opis:
This paper describes the problem of searching for the causes of damage in the form of rupture of a strength member of the main landing gear. There have been two incidents noted which both occurred during hangar storage. It should be pointed out that the two occurrences mentioned concern a particular aircraft currently in operation, and that these incidents occurred a few days after the last flight. This article presents part of the investigation process needed to determine the causes of cracks in the test item. The crack growth analysis of the pull rod was performed using the NASGRO software. In order to perform the calculations, the information was gathered during previously conducted material studies and flight tests.
Źródło:
Fatigue of Aircraft Structures; 2011, 3; 64-73
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crack growth diagnostic of ball bearing using vibration analysis
Autorzy:
Belaidi, S.
Lecheb, S.
Chellil, A.
Mechakra, H.
Safi, B.
Kebir, H.
Powiązania:
https://bibliotekanauki.pl/articles/2174182.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
łożysko kulkowe
drgania
pękanie
zmęczenie
ball bearing
vibration analysis
frequency
cracking
diagnosis
fatigue life
Opis:
It is known that supported ball bearings have great effects on the vibrations of the gear transmission system, above in all the presence of local faults as well as the crack growths. For this purpose, this paper focuses on shock and vibration crack growth diagnostic of ball bearing using vibration analysis. Our work is devoted first to a study the static behaviour of the ball bearing by determining the stress, strain and displacement, then its dynamic behaviour by determining the first four natural frequencies. Secondly, a dynamic analysis study of the bearing was carried with defects as a function of crack size and location. The obtained results clearly show that the natural frequencies decrease in a non-linear way with the growth of the length of the crack, on the other hand the stress increases with the presence of the singular points of the crack. Finally, this residual decrease in natural frequencies can be used as an indicator of the state of failure, as well as a parameter used for the diagnosis and screening, and to highlight the fatigue life of the bearing.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 35--45
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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