Temat: loading distribution - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The influence of hydraulic loading on biofilm properties in a subsurface wastewater infiltration system
Autorzy:: Zhang, L.
Yang, J.
Powiązania:: https://bibliotekanauki.pl/articles/205392.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: subsurface wastewater infiltration system
biofilms
hydraulic loading
spatial distribution
biofilm properties
Opis:: In this study, a pilot-scale subsurface wastewater infiltration system (SWIS) was deployed to study landscape water treatment. The goal of the study was to investigate the effects of hydraulic loading on pollutant removal and the spatial distribution of biofilm properties in SWIS. Results showed that the efficiencies of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) removal degraded as hydraulic loading increased. Furthermore, quantities of the biofilm properties parameter s increased with the hydraulic loading. Polysaccharide and protein levels ranged from 560 to 1110 μg/g filler and 60 to 190 μg/g filler, respectively, at a hydraulic loading of 0.2 m/d. At a hydraulic loading of 0.4 m/d, the quantities of polysaccharide and protein ranged from 1200 to 3300 μg/g filler and 80 to 290 μg/g filler, respectively. Biofilm intensity and biofilm activity per unit weight decreased with the increase in hydraulic loading.
Źródło:: Archives of Environmental Protection; 2016, 42, 4; 70-79
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of fracture toughness of structural timber. Part I. Theory and experimental tests
Autorzy:: Kyzioł, L.
Powiązania:: https://bibliotekanauki.pl/articles/258732.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: anisotropic material
anisotropic material cracking
CAD specimens
test stand
complex loading
stress distribution
Opis:: This paper presents fundamentals of fracture mechanics of anisotropic materials. Fracture toughness of anisotropic materials, e.g. structural timber, depends a. o. on state of stress, environment, temperature and changes due to ageing, therefore in such materials cracking process runs in various ways. Timber is characterized by eighteen coefficients which determine its fracture toughness in contrast to metals for which this number is as low as three. In this part of considerations a way of conducting the tests of specimens subjected to cracking as well results of the tests of natural and modified timber, are presented.
Źródło:: Polish Maritime Research; 2010, 3; 53-58
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Strength statistical characteristics of the isotropic materials with disc-shaped defects
Autorzy:: Kvit, R.
Powiązania:: https://bibliotekanauki.pl/articles/122597.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: isotropic material
disc-shaped crack
distribution law
failure loading
strength statistical characteristics
axisymmetric loading
materiał izotropowy
wytrzymałość materiałów
charakterystyka statystyczna
pęknięcie
Opis:: The expressions of the probabilities density distribution of failure loading for an elastic isotropic body under the action of a homogeneous axisymmetric loading are written. The disc-shaped cracks that do not interact with each other are uniformly distributed. The correlation for finding the most probable, mean value, dispersion and variation coefficient of failure loading are obtained. The dependence of the mentioned statistical strength characteristics on the type of applied loading, number of defects (body sizes) and structure material heterogeneity are investigated.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 4; 25-34
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Investigation of probabilistic aspects reliability of isotropic bodies with internal defects
Autorzy:: Kvit, Roman
Powiązania:: https://bibliotekanauki.pl/articles/2202039.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: fracture
reliability
distribution law
axisymmetric loading
disc-shaped crack
isotropic material
pękanie
niezawodność
obciążenie osiowosymetryczne
materiał izotropowy
Opis:: A study of the stress state and reliability of an isotropic body with the same material crack resistance and evenly distributed internal defects-cracks under the conditions of homogeneous axisymmetric loading is carried out. Defects are characterized by two independent random variables – a radius and orientation angle. The probability density distribution of the defect radius is chosen in the form of an exponential law. The probability density distribution of the defect orientation angle is chosen in the form of a law that corresponds to the material isotropy. The influence of the loading level, type of stress state and body size (number of defects) on the most probable value, the mean value and the dispersion of failure loading (strength) are investigated.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 3; 73--84
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Diagrams of statistical strength criterion for reinforced composite materials
Autorzy:: Kvit, Roman
Salo, Tetyana
Powiązania:: https://bibliotekanauki.pl/articles/1839842.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: composite material
rigid inclusion
distribution function
strength criterion
failure loading
materiał kompozytowy
kryterium wytrzymałości
efekt skali
stan naprężenia
Opis:: The model of a plate brittle material reinforced with randomly sized and placed rigid rectilinear inclusions that do not interact with each other is considered. The geometric parameters of inclusions (length and orientation) are statistically independent random variables, with certain given laws of probability distribution. Diagrams of statistical strength criterion for such plates are constructed under conditions of comprehensive tension-compression. The diagrams are constructed for plates using a material of a different structural inhomogeneity and Poisson’s ratio of an elastic homogeneous matrix. The statistical nature of the scale effect is studied, the intensity of which depends on the type of stress state.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 1; 43-51
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Development of the statistical model failure of orthotropic composite materials
Autorzy:: Kvit, Roman
Powiązania:: https://bibliotekanauki.pl/articles/24201506.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: stochasticity
probability of failure
orthotropic composite material
failure loading
integral probability distribution function
stochastyczność
prawdopodobieństwo uszkodzenia
ortotropowy materiał kompozytowy
całkowa funkcja rozkładu prawdopodobieństwa
Opis:: A composite plate (matrix and reinforcing elements) under conditions of plane deformation is considered. According to the elastic properties, the material of the plate is considered orthotropic with uniformly distributed defects-cracks that do not interact with each other. The geometric characteristics of defects are statistically independent random variables – the half-length and the orientation angle between the defect line and the axis of orthotropy with a larger Young’s modulus. The ratio for the failure loading integral probability distribution function of the composite was obtained. The dependencies of the researched composite probability of failure (reliability) for the different number of cracks (plate sizes), different types of loading and various values of the exponential distribution parameter are calculated and investigated graphically.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2023, 22, 2; 26--35
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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