Wszystkie pola: heating temperature - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The temperature of a brake disc during frictional heating with linear distribution of the contact pressure
Autorzy:: Topczewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/134821.pdf
Data publikacji:: 2016
Wydawca:: ADVSEO
Tematy:: contact pressure
frictional heating
heat conduction equation
temperature
friction
brake disc
Opis:: In this paper the analytical solution of the boundary–value heat conduction problem for a brake rotor was developed. A solid brake disc is heated by frictional heat flux during braking with constant deceleration. Intensity of the heat flux affecting friction surface of the disc is proportional to the specific power of friction. It was assumed that contact pressure between the pad and the disc increases linearly, from zero in the initial moment of the braking process to the maximum value in standstill. Calculations were carried out on variables and parameters in the dimensionless form. The obtained results were compared with adequate resultsduring braking with constant deceleration, with an assumption of pressure constant in time.
Źródło:: Technical Issues; 2016, 3; 113-119
2392-3954
Pojawia się w:: Technical Issues
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Temperature distribution in a brake disc with variable contact pressure
Autorzy:: Topczewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/134744.pdf
Data publikacji:: 2016
Wydawca:: ADVSEO
Tematy:: braking
frictional heating
temperature
brake disc
Opis:: The aim of this study was to investigate the influence of the time of pressure increase during single braking on the temperature in a brake disc. The case of linear pressure increase from zero to nominal value in the initial stage of braking and maintaining this value to standstill was considered. The time distribution of the sliding velocity of frictional elements was determined from the differential equation of motion with the initial condition. Based on the time distributions of pressure and sliding velocity, the intensity of the frictional heat flux, which affects on the disc surface, was determined. Spatio-temporal distribution of the temperature in a brake disc was found from analytical solution of the heat conduction boundary–value problem for semi–space heated on the outer surface heat flux with known a priori intensity. The numerical analysis conducted allowed to determine engineering equation, which describes relation between maximum temperature and the time of pressure increase.
Źródło:: Technical Issues; 2016, 1; 90-95
2392-3954
Pojawia się w:: Technical Issues
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Frictional heating with time-dependent specific power of friction
Autorzy:: Topczewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/386356.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: brake disc
frictional heating
temperature
time-dependent power of friction
Opis:: In this paper analytical solutions of the thermal problems of friction were received. The appropriate boundary-value problems of heat conduction were formulated and solved for a homogeneous semi–space (a brake disc) heated on its free surface by frictional heat fluxes with different and time-dependent intensities. Solutions were obtained in dimensionless form using Duhamel's theorem. Based on received solutions, evolution and spatial distribution of the dimensionless temperature were analyzed using numerical methods. The numerical results allowed to determine influence of the time distribution of friction power on the spatio-temporal temperature distribution in brake disc.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 2; 111-115
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Thermal stresses due to frictional heating with time-dependent specific power of friction
Autorzy:: Topczewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/386412.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: frictional heating
temperature
thermal stresses
time-dependent power of friction
Opis:: In this paper influence of temporal profile of the specific friction power (i.e. the product of the coefficient of friction, sliding velocity and contact pressure) on thermal stresses in a friction element during braking was investigated. Spatio-temporal distributions of thermal stresses were analytically determined for a subsurface layer of the friction element, based on the model of thermal bending of a thick plate with unfixed edges (Timoshenko and Goodier, 1970). To conduct calculations, the fields of dimensionless temperature were used. These fields were received in the article (Topczewska, 2017) as solutions to a one-dimensional boundary-value problem of heat conduction for a semi-space heated on its outer surface by fictional heat flux with three, different time profiles of the friction power.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 4; 280-284
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Axi-symmetrical contact problem during breaking with frictional heating and wear
Osiowosymetryczne kontaktowe zagadnienie podczas hamowania z uwzględnieniem generacji ciepła
Autorzy:: Yevtushenko, A.
Chapovska, R.
Powiązania:: https://bibliotekanauki.pl/articles/281236.pdf
Data publikacji:: 1998
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: frictional heating
wear
contact pressure
temperature
breaking system
Opis:: The problem of transient contact with frictional heating and wear for two non-uniform sliding half-spaces is considered. One of the two halfspaces is assumed to be slightly curved to give a Hertzian initial pressure distribution; the other is a rigid non-conductor. On the assumption that the contact pressure distribution could be described by the Hertz formulas during whole the process of interaction, the problem is formulated in terms of one integral equation of the Volterra type an unknown radius of the contact area. A numerical solution of this equation is obtained using a piecewise-constant representation of unknown function. The influence of operating parameters on the contact temperature and the radius of the contact area is studied.
W pracy rozpatrzono zagadnienie kontaktowe z uwzględnieniem generacji ciepła dla dwóch ślizgających się półprzestrzeni. O jednej z półprzestrzeni założono, że jest gładko zakrzywiona co powoduje Hertzowski początkowy rozkład ciśnienia. Druga z półprzestrzeni jest izolatoerm. Wykorzystując założenie, że ciśnienie kontaktowe może być założone w postaci rozkładu otrzymanego przez Hertza podczas trwania oddziaływania, zagadnienie zostało zredukowane do równania całkowego typu Voltera na nieznany promień obszaru kontaktu. Rozwiązanie numeryczne zostało przedstawione wykorzystując kawałkami stałą reprezentację nieznanej funkcji. Zbadano wpływ parametrów charakteryzujących ciała na temperaturę w obszarze kontaktu oraz promień obszaru kontaktu.
Źródło:: Journal of Theoretical and Applied Mechanics; 1998, 2; 331-346
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of the temporal profile of the friction power on temperature of a pad-disc brake system
Autorzy:: Yevtushenko, Aleksander
Kuciej, Michał
Topczewska, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/281040.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: braking
friction power
frictional heating
temperature
heat flux
Opis:: A mathematical model to analyse the influence of change of the friction power over time on temperature of a pad-disc tribosystem has been proposed. For this purpose, a boundary- -value problem of heat conduction for two semi-infinite bodies with taking into account heat generation due to friction on the contact surface has been formulated. Exact solutions of this problem were obtained for seven temporal profiles of the specific heat generation power, which were established experimentally. For selected friction materials, numerical analysis of the spatiotemporal temperature distributions and heat fluxes intensities were executed. The obtained results were compared with a corresponding data which were found by means of the known approximate solution.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 2; 461-473
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The comparable analysis of temperature distributions assessment in disc brake obtained using analytical method and FE model
Autorzy:: Kuciej, M.
Powiązania:: https://bibliotekanauki.pl/articles/242279.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: frictional heating
FEM
heat conductivity
disc brake
Opis:: In this paper the one-dimensional analytical formulation as well as the two-dimensional FE model to study the temperature distributions in the pad/disc brake system during an emergency braking process was proposed. Both the time-dependent pressure variation and the convective cooling conditions on the free surfaces of a pad have been incorporated in the contact analytical model. The one-dimensional thermal problem of friction of the strip-foundation system during braking was formulated. An exact solution of the problem using the mathematical device of the integral Laplace transform related to Duhamel theorem was obtained. In the FE formulation to discretize the heat conduction equation for the two-dimensional problem, the Galerkin method was employed. The temperature distributions were calculated exclusively for the disc employing the heat partition ratio. Furthermore, due to the symmetry of the problem the computations were restricted to the half of the entire disc. The finite element analysis of the transient heat transfer problem for the pad/disc system was carried out using the MSC Patran/Nastran program package. On order to confront and compare the resulting temperatures distributions, equal operation parameters, the thermophysical properties of materials as well as the dimensions of the brake components were used within the numerical and analytical calculation. The obtained results from the finite element analysis reveal that both the contact temperature evolution and its values in depth of the brake rotor agree well with the analytical solution and experimental data.
Źródło:: Journal of KONES; 2011, 18, 2; 235-259
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Finite element analysis of the 3D thermal stress state in a brake disk
Autorzy:: Adamowicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/281459.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: frictional heating
temperature
thermal stresses
pad-disk brake system
finite element method
Opis:: The quasi-static thermal stress state within the linear uncoupled elasticity is studied. The calculations were performed using the finite element method (MSC.Patran/MSC.Nastran). In order to examine smooth stress changes in a brake disk during braking, based on the temperature fields at particular time steps, additionally the script using Python programming language was developed. The numerical three-dimensional FE model of the brake disk for calculation of the transient temperature field was adopted from the previous author’s study. A single braking process at linear deceleration and constant contact pressure was simulated. The evolutions and the contours of the components of the stress tensor as well as the equivalent Huber-Mises stress were examined. The most important aspects of the stress state during braking were discussed.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 1; 205-218
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Analytical model for investigation of the effect of friction power on thermal stresses in friction elements of brakes
Autorzy:: Topczewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/281308.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: frictional heating
temperature
specific power of friction
braking
thermal stresses
Opis:: The influence of the change with time of friction power on thermal stresses in a friction element of a brake system is investigated. For this purpose, a list of ten different temporal profiles of specific friction power is used, which has been experimentally established for a single braking process. The corresponding profiles of transient temperature fields in the considered element are applied as input parameters to find quasi-static thermal stresses. Numerical analysis concerned with spatio-temporal distributions of the stresses and their evolutions on the heated surface is presented.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 4; 1017-1027
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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