Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Poisson’s ratio" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-10 z 21
Tytuł:
Modelling of impulse load influence on the stress state of foam materials with positive and negative poisson’s ratio
Autorzy:
Sulym, Heorhiy
Mikulich, Olena
Shvabyuk, Vasyl
Powiązania:
https://bibliotekanauki.pl/articles/387508.pdf
Data publikacji:
2020
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
stress state
foam
poisson’s ratio
cosserat elasticity
Opis:
The influence of impulse load applied for different duration on the distribution of normalised dynamic radial stresses in positive and negative Poisson’s ratio medium was investigated in this study. For solving the non-stationary problem in the case of plane deformation for structurally inhomogeneous materials, the model of Cosserat continuum was applied. This model enables accounting for the influence of shear-rotation deformation of micro-particles of the medium. In the framework of Cosserat elasticity, on applying the Fourier transforms for time variable and developing the boundary integral equation method, solving of the non-stationary problem reduces to the system of singular integral equations, where the components that determine the influence of shear-rotation deformations are selected. The numerical calculations were performed for the foam medium with positive and negative Poisson’s ratio for different values of time duration of impulse. Developed approach can be used to predict the mechanical behaviour of foam auxetic materials obtained at different values of a volumetric compression ratio under the action of time variable load based on analysis of the dis-tribution of radial stresses in foam medium.
Źródło:
Acta Mechanica et Automatica; 2020, 14, 2; 79-83
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pore Fluid and Lithology Discrimination of a Well in the Niger Delta Region using Elastic Parameters
Autorzy:
Agbasi, Okechukwu E.
Chukwu, Godwill U.
Igboekwe, Magnus U.
E. Etuk, E. Etuk
Powiązania:
https://bibliotekanauki.pl/articles/1112773.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Elastic Parameters
Lithology
Poisson’s ratio
Pore Fluids
Velocity ratio
Opis:
With respect to the high uncertainties associated with methods of determining lithology and pore fluid using well logs, quantitative rock physics analyses was used to determine the lithology and pore fluid of a reservoir in the Niger Delta. Inaccurate prediction of lithology and pore fluid results in the inaccurate determination of other petrophysical properties and parameters such as porosity, permeability, net pay, etc. The primary objective of this research is to predict lithology and pore fluid using rock physics analysis. However, reservoir zones were also predicted. Density, compressional wave velocity and shear wave velocity logs were used as input to calculate elastic parameters such as velocity ratio, Poisson’s ratio and Bulk Modulus. The calculated velocity ratio log was used to differentiate between sand and shale. Poisson’s ratio and velocity ratio using the Goodway interpretation template was carried out and used to delineate pore fluid content; gas sand, oil sand and sandstone formation from cross-plot analysis.
Źródło:
World News of Natural Sciences; 2018, 17; 75-88
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration frequencies of a rectangular plate with linear variation in thickness and circular variation in Poisson’s ratio
Autorzy:
Sharma, Amit
Powiązania:
https://bibliotekanauki.pl/articles/280855.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
rectangular plate
circular variation
linear variation
Poisson’s ratio
Opis:
The frequency for the first two modes of vibration of a nonhomogeneous tapered rectangular plate is calculated under a bi linear (i.e., linear along both the axes) temperature field. For consideration of the nonhomogeneous material, the author assumed circular variation in Poisson’s ratio. Tapering in the plate is assumed to be linear in one direction. The results are calculated for different values of plate parameters and presented with the help of graphs. Comparison of the results is also given, to support the results of the present study.
Źródło:
Journal of Theoretical and Applied Mechanics; 2019, 57, 3; 605-615
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties and sound velocity of gold copper (AuCu) II superlattice: 3D molecular dynamic (MD) simulation
Autorzy:
Aish, Mohammed Mahmoud
Powiązania:
https://bibliotekanauki.pl/articles/1839596.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
sound velocity
rigidity
Young’s modulus
Poisson’s ratio
density
Opis:
Young’s modulus, yield stress and Poisson’s ratio are studied for different size and tem- perature. The temperature dependence of simulated Young’s modulus is quite similar to experimental results. Transverse sound velocity is estimated from the simulated elastic con- stants at each temperature. The dislocation speed reaches up to 75% of the transverse sound velocity. The dislocation speed decreases with increasing temperature linearly. The tempera- ture dependence of macroscopic deformation behavior and the possibility of the existence of supersonic dislocations are discussed. The transverse sound velocity and rigidity G is calcu- lated from Young’s modulus, Poisson’s ratio and density ρ which changes with temperature.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 901-909
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shear properties of a honeycomb structure with zero Poisson’s ratio
Autorzy:
Song, L.
Sun, Y.
Han, Z.
Wang, T.
Wang, H.
Yin, C.
Shen, X.
Powiązania:
https://bibliotekanauki.pl/articles/38697109.pdf
Data publikacji:
2023
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
honeycomb structure
zero Poisson’s ratio
shear properties
small deformation
large deformation
Opis:
Honeycomb structures with zero Poisson’s ratio show promising potential for application in variable-sweep wing aircraft. The shear properties of these honeycomb structures serve as a crucial indicator of their morphing capacity. This paper derives the linear and non-linear shear properties of a honeycomb structure with zero Poisson’s ratio. A modified factor is introduced to establish a relationship between the linear and non-linear shear modulus of the honeycomb structure, simplifying the calculation method of the non-linear shear modulus. The validity of theoretical predictions is then confirmed using the finite element method Furthermore, the influences of the geometric parameters on the shear properties of the honeycomb structure with zero Poisson’s ratio are investigated, highlighting the varying contributions of these cell geometric parameters to the shear properties.
Źródło:
Archives of Mechanics; 2023, 75, 5; 521-541
0373-2029
Pojawia się w:
Archives of Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-camera system for measuring paper deformations based on image analysis
Autorzy:
Pełczyński, Paweł
Szewczyk, Włodzimierz
Bieńkowska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1849045.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital image processing
characteristic point tracking
paper physical properties
deformation analysis
Poisson’s ratio
Opis:
The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 509-522
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-camera system for measuring paper deformations based on image analysis
Autorzy:
Pełczyński, Paweł
Szewczyk, Włodzimierz
Bieńkowska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1849002.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital image processing
characteristic point tracking
paper physical properties
deformation analysis
Poisson’s ratio
Opis:
The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 509-522
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-camera system for measuring paper deformations based on image analysis
Autorzy:
Pełczyński, Paweł
Szewczyk, Włodzimierz
Bieńkowska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1849104.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital image processing
characteristic point tracking
paper physical properties
deformation analysis
Poisson’s ratio
Opis:
The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 509-522
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the lower limb prosthesis subjected to various load conditions
Autorzy:
Kowalczyk, Milena
Jopek, Hubert
Powiązania:
https://bibliotekanauki.pl/articles/2146610.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
prosthetic sockets
FEM analysis
auxetic
negative Poisson’s ratio
leje protezowe
analiza MES
auksetyk
ujemny współczynnik Poissona
Opis:
This article presents the simulation of a prosthetic socket with an auxetic structure under typical loading cases. The designed model of prosthetic socket is dedicated to patients who have undergone transfemoral amputation and consists of four elements, among which can be distinguished an inner lining, a shock absorbing element, component with a honeycomb re-entrant structure, which has a negative Poisson's ratio an outer shell. The prosthetic socket was analysed by means of the finite element method. The simulations were used to evaluate the strength of the design and to check whether it is possible to avoid a problem of changing the circumference of the patient's stump, thanks to the use of an auxetic structure in the socket.
Źródło:
Vibrations in Physical Systems; 2020, 31, 3; art. no. 2020309
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Portland cement addition on Young’s modulus of geopolymer concrete cured at ambient conditions
Wpływ dodatku cementu portlandzkiego na moduł Younga betonu geopolimerowego z popiołu lotnego dojrzewającego w warunkach laboratoryjnych
Autorzy:
Anaszewicz, Ł.
Rekucki, R
Stolarski, A.
Powiązania:
https://bibliotekanauki.pl/articles/209853.pdf
Data publikacji:
2018
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
engineering
construction materials
geopolymer concrete
Young’s modulus
Poisson’s ratio
alkali-activated concrete
budownictwo
materiały budowlane
beton geopolimerowy
moduł Younga
współczynnik Poissona
Opis:
This paper presents the results of Young’s modulus and Poisson’s ratio tests conducted on samples made of low-calcium fly ash-based geopolymer concrete samples and on samples with a 10% addition of Portland cement, cured at ambient conditions. Furthermore, the measurement system, as well as sampling and sample preparation methodology, are discussed. Strain was tested concurrently using resistive strain gauges and extensometer on cylinder-shaped samples with a diameter of 150 mm and height of 300 mm.
W artykule przedstawiono wyniki badań modułu Younga oraz współczynnika Poissona przeprowadzonych na próbkach wykonanych z betonu geopolimerowego na bazie popiołu lotnego niskowapiennego oraz próbkach z 10% dodatkiem cementu portlandzkiego dojrzewających w warunkach laboratoryjnych. Ponadto przedstawiono układ pomiarowy oraz metodologię wykonywania i badania próbek. Odkształcenia badano równocześnie przy użyciu tensometrów rezystancyjnych oraz ekstensometrów na próbkach walcowych o średnicy 150 mm i wysokości 300 mm.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2018, 67, 4; 71-81
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 21

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies