Temat: frictional materials - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Occupational Exposure to Harmful Chemical Substances While Processing Phenol-Formaldehyde Resins
Autorzy:: Pośniak, M.
Kozieł, E.
Jeżewska, A.
Powiązania:: https://bibliotekanauki.pl/articles/89707.pdf
Data publikacji:: 2001
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: phenol-formaldehyde resins
occupational exposure
workplace air
carcinogenic compounds
abrasive materials
frictional materials
wyroby chemiczne
substancje rakotwórcze
substancje niebezpieczne
substancje szkodliwe
narażenie zawodowe
Opis:: Air pollutants emitted while processing phenol-formaldehyde resins have been investigated. Gas chromatography-mass-selective detection was used to separate and identify chemical compounds. It was determined that workers were exposed to formaldehyde in all workplaces. Besides, phenol, acetaldehyde, acrylaldehyde, 2-furaldehyde, xylene, ethylbenzene, toluene, tetrachlorethene, ethyl acetate, butyl acetate were found during the production of frictional materials; and 2-furaldehyde, phenol, naphthalene, 2- furanmethanol, polycyclic aromatic hydrocarbons (PAHs) during the production of abrasive materials. Quantitative analyses were performed with gas chromatography and high performance liquid chromatography. Assessment of occupational exposure indicated that chemical compounds emitted during the investigated processes might be dangerous for human health, mainly because of suspected carcinogenic compounds: formaldehyde and PAHs.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2001, 7, 3; 263-276
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Frictional heating of sliding semi-spaces with simple thermal nonlinearities
Autorzy:: Och, E.
Powiązania:: https://bibliotekanauki.pl/articles/386462.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: temperatura tarcia
materiały termoczułe
frictional heating
simple thermal nonlinearities
thermosensitive materials
Opis:: In the article the nonstationary thermal problem of friction for two semi-spaces with taking into account their imperfect thermal contact and thermosensitivity of materials (simple nonlinearity), has been considered. The linearization of this problem has been carried out using Kirchhoff transformation, and next using the Laplace integral transform. The analytical solution to the problem in the case of con-stant speed sliding, has been obtained. On the basis of the obtained solutions and using Duhamel's formula, the analytical solution to the problem for sliding with constant deceleration, has been obtained, too. The results of numerical analysis are presented for two friction pairs.
Źródło:: Acta Mechanica et Automatica; 2013, 7, 4; 236-240
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Frictional heating during sliding of two semi-spaces with arbitrary thermal nonlinearity
Autorzy:: Och, E.
Powiązania:: https://bibliotekanauki.pl/articles/386528.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: frictional heating
arbitrary thermal non-linearity
thermosensitive materials
temperatura tarcia
materiały termoczułe
nieliniowość termiczna
Opis:: Analytical and numerical solution for transient thermal problems of friction were presented for semi limited bodies made from thermosensitive materials in which coefficient of thermal conductivity and specific heat arbitrarily depend on the temperature (materials with arbitrary non-linearity). With the constant power of friction assumption and imperfect thermal contact linearization of nonlinear problems formulated initial-boundary thermal conductivity, using Kirchhoff transformation is partial. In order to complete linearization, method of successive approximations was used. On the basis of obtained solutions a numerical analysis of two friction systems in which one element is constant (cermet FMC-845) and another is variable (grey iron ChNMKh or aluminum-based composite alloy AL MMC) was conducted.
Źródło:: Acta Mechanica et Automatica; 2014, 8, 4; 204-208
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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