Autor: Wacławiak, Krzysztof - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A proposal of a novel geometrical measure of material effort
Autorzy:: Wacławiak, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/38884607.pdf
Data publikacji:: 2022
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: stress tensor
geometrical representation
material effort hypotheses
Opis:: A stress tensor may be presented as a surface delimited by a stress vector located at angles α₁, α₂, α₃ in relation to axes x, y, z. Geometrically, it outlines a domain and is linked to the loading. In this study, the area of such a surface and the volume of the domain were determined, along with their cross-sections with reference to areas and circumferences. Different stresses were also compared. This article presents cases of uniaxial, biaxial, triaxial tension and pure shear for an isotropic solid body. The analysis of a stress tensor in this conceptual work does not involve any material features, yet yields interesting results, particularly in the case of pure shear and uniaxial tension.
Źródło:: Engineering Transactions; 2022, 70, 2; 183-199
0867-888X
Pojawia się w:: Engineering Transactions
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Transient heat transfer as a leading factor in fatigue of thick-walled elements at power plants
Autorzy:: Wacławiak, Krzysztof
Okrajni, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/240021.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thick-walled elements
transient heat transfer
thermomechanical fatigue
element grubościenny
zawór wylotowy
zmęczenie cieplno-mechaniczne
Opis:: The authors present a numerical study of a start-up of a boiler with a thick-walled element subjected to thermomechanical loading. The significance of calculations of real heat transfer coefficients has been demonstrated. Fluid dynamics, mechanical transient thermal and static structural calculations have been conducted in both separate and coupled modes. Strain-stress analyses prove that the effect of the heat transfer coefficient changing in time and place in comparison with a constant one as recommended by standards is the key factor of fatigue calculations.
Źródło:: Archives of Thermodynamics; 2019, 40, 3; 43-55
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Statistical Analysis of Properties of Technological Charge and Manufacturing Tolerance of Thin-Walled Sections in Process of Multi-Workstations Roller Bending
Autorzy:: Tracz, P.
Wacławiak, Krzysztof
Chrapoński, Jacek
Popiel, R.
Powiązania:: https://bibliotekanauki.pl/articles/28099633.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: technological charge
cold-rolled forming
statistics
manufacture tolerance
Opis:: The studied collecting electrodes for electrostatic precipitators are cold-rolled formed. Here Sigma 750 open section was manufactured of DC01 steel grade. Length of the electrodes ranged from 8 to 13 meters, all were thin-walled of 1.5 mm. Tolerance of their manufacture is strictly set. A database of material properties, chemical composition, and a set of final tolerance of manufactured profiles has been collected. At first basic statistics for the data has been done. Finally statistical relation between the material composition and profile geometrical tolerance has been studied, next between the material mechanical properties and profile geometrical tolerance has been examined.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 2; 733--740
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

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