Autor: Ligaj, B. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of a simplified method for determining fatigue charts ΔS-N on the example of welded and soldered connectors
Autorzy:: Szala, G.
Ligaj, B.
Powiązania:: https://bibliotekanauki.pl/articles/258969.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: fatigue durability
S-N diagram
FITNET
bonded joints
Opis:: The paper describes the method of determining fatigue charts ΔS-N, which is particularly useful in the description of fatigue properties of welded and soldered joints. This method is based on IIW (International Institute of Welding) guidelines and FITNET procedures. This method makes it possible to design ΔS-N charts in a probabilistic approach, which is important in the reliability analysis of structural elements. The work also contains examples of charts resulting from the development of test results for selected welded and soldered joints.
Źródło:: Polish Maritime Research; 2018, 2; 92-99
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Experimental verification of two-parametic models of fatigue characteristics by using the tests of S55J0 steel as an example
Autorzy:: Ligaj, B.
Szala, G.
Powiązania:: https://bibliotekanauki.pl/articles/259441.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: two-parametic models
fatigue characteristics
tests of S55J0 steel
computations
fatigue life tests
high-cycle fatigue range
Opis:: This paper presents experimental verification of models of two-parametric fatigue characteristics N(óa , óm ) on the basis of results of fatigue tests of specimens made of S355J0 steel. On the basis of comparative analysis of results of computations and fatigue life tests of the specimens, performed under constant amplitude sinusoidal loads of different cycle asymmetry ratios, the most versatile models were distinguished. The tests in question were carried out in the high-cycle fatigue range.
Źródło:: Polish Maritime Research; 2010, 1; 39-50
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Comparative analysis of fatigue life calculation methods of C45 steel in conditions of variable amplitude loads in the low- and high-cycle fatigue ranges
Autorzy:: Ligaj, B.
Szala, G.
Powiązania:: https://bibliotekanauki.pl/articles/259880.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: fatigue life calculations
C45 steel
Opis:: In the paper [1] assumptions for fatigue life calculations in the low- and high- cycle fatigue ranges of metal alloys, have been formulated. Three calculation methods: that expressed in stresses, strains and a mixed (stress-strain) one, have been there presented. In this paper results of fatigue life calculations of C45 steel performed in line with the above mentioned methods have been described, and their comparative analysis has been made. The calculations have been carried out for two-level and multi-level load programs of the varying parameters: maximum load within a load program and different values of spectrum filling factor. The comparative analysis of the results of fatigue life calculations in compliance with the above mentioned methods makes it possible to assess differences in the results and depenendence of the differences on values of load program parameters.
Źródło:: Polish Maritime Research; 2012, 4; 23-30
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Calculations of cylindrical tooth wheels in view of iso 6336 standard and recommendations of classification society CN 41.2-DNV-GL
Autorzy:: Grączewski, A.
Ligaj, B.
Powiązania:: https://bibliotekanauki.pl/articles/2073648.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: fatigue life
calculations of toothed gears
ISO 6336 standard
Opis:: In this study there are presented ISO 6336 standard and recommendations of classification society CN 41.2-DNVGL regarding calculations of cylindrical toothed gears used in all oceanic ships and oil rigs. The calculation method presented in this study allows to perform calculations of the safety coefficient for stress at the tooth base SF and for contact stress SH. The calculations have been performed for gears with different geometric parameters and for three load spectra. The obtained results enable to determine the values of relative differences in δF and δH, which are: δF = 16,7% to 42,8% and δH = 10,4% to 22,6%.
Źródło:: Journal of Polish CIMEEAC; 2015, 10, 1; 75--83
1231-3998
Pojawia się w:: Journal of Polish CIMEEAC
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Structural solutions to be used in exoskeletons of hand fingers
Autorzy:: Maćkowiak, P.
Ligaj, B.
Powiązania:: https://bibliotekanauki.pl/articles/2073659.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: exoskeleton
hand
fingers
Opis:: This study is a presentation of state of the art in the field exoskeletons of hand fingers. Exoskeletons of hand fingers have been characterized on the basis of an analysis of currently existing structural solutions. The goal of this research is to present a new concept of the device being a modification of Shield’s exoskeleton. Despite a large demand for hand exoskeletons the currently available solutions often fail to meet requirements of doctors and patients. Due to many freedom degrees characteristic of a human hand a compromise is necessary between simplicity of the device and the possibility of performing basis grasps.
Źródło:: Journal of Polish CIMEEAC; 2015, 10, 1; 91--99
1231-3998
Pojawia się w:: Journal of Polish CIMEEAC
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Problems of equivalent load amplitude in fatigue life calculations
Autorzy:: Ligaj, B.
Sołtysiak, R.
Powiązania:: https://bibliotekanauki.pl/articles/258812.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: operational load
equivalent load amplitude
two-parameter fatigue characteristics
fatigue life
Opis:: This paper presents issues of fatigue life calculations in operational load conditions. The assumed runs were so processed as to get a set of sinusoidal cycles by using the following methods: full cycles counting method and rainflow counting method. On the basis of such sets of cycles of the varying parameters Sm i and Sa i were prepared block load spectra of equivalent amplitudes Saz , obtained with the use of an original method of these authors, in which two-parameter fatigue characteristics were applied. The work resulted in comparison of fatigue life results for load spectra determined by using the assumed cycles counting methods and the assumed two-parameter fatigue characteristics: the model IM, model II, model III and model IV, respectively.
Źródło:: Polish Maritime Research; 2016, 1; 85-92
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

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