Wyniki wyszukiwania - Biblioteka Nauki

Ten serwis zostanie wyłączony 2025-02-11.

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 4

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: flexural modulus

Sortuj według:

Ogranicz wyniki do:

Bending strength of beech laminated wood after load by cyclic bending

100%

Gáborík J. , Langová N.

2018

tom No. 104

571--78

For unique properties is laminated wood particularly suitable for the production of seating and bedding. The main aim of this research is focused on the investigation of the bending properties of laminated beech wood after load by cyclic bending. During the cyclic load were observed properties, strength and elasticity, which changed unevenly. The changes in most cases were not statistically significant.

Tensile and flexural moduli for human orbital wall bones - comparative study

88%

Lemski P. , Żerdzicki K. R. , Klosowski P. , Skorek A. , Zmuda-Trzebiatowski M. A.

Acta of Bioengineering and Biomechanics

2023

tom Vol. 25, no. 3

53--60

The main aims of the current research were: (1) to analyze in detail the tensile modulus and ultimate tensile strength (UTS) of orbital wall bones separately for the left and right orbit of the same cadaver and (2) to compare the obtained results with a flexural modulus of the left and right orbit reported earlier by A. C. van Leeuwen et al. [14]. A set of 54 specimens of orbital superior and/or medial walls harvested from 16 human skulls (4 female, 12 male) were tensioned at 0.01 mm/s till fracture. The samples were taken always from both orbits of the same cadaver. For each sample, cross-section area, apparent density, tensile modulus, and UTS were identified. For pooled female and male group apparent density for right and left orbit was identified to be 1.59 (± 0,52 SD) g/cm3 and 1.51 (± 0.48 SD) g/cm3 , tensile modulus 2028 (± 1729 SD) MPa and 2706 (± 2812 SD) MPa, and UTS 14.17 (± 15.00 SD) MPa and 15.03 (± 11.44 SD) MPa, respectively. For tensile tests, there were no statistical differences between the left and right orbit for pooled male and female groups for (a) apparent density (T-Student test p=0.567), (b) UTS (Mann-Whitney U-test p=0.350) and (c) tensile modulus (Mann-Whitney U-test p=0.716). For bending tests, there were no statistical differences between the left and right orbit for the pooled male and female group for (a) orbital wall thickness (T-Student test p=0.811) and (b) flexural modulus (Mann-Whitney Utest p=0.206). The comparative analysis between tensile and flexural moduli for pooled left and right groups (with no distinction for male and female) revealed no statistically significant difference (Mann-Whitney U-test p=0.074). The maximum tensile modulus was 7279 MPa and 9913 MPa for the right and left orbit, respectively, and was similar to the maximum flexural modulus of 6870 MPa and 9170 MPa reported in an earlier study, for the right and left orbit, respectively.

Three-Point Bending Response of Nylon 12 Obtained by Fused Filament Fabrication (FFF) Versus Selective Laser Sintering (SLS)

63%

Baba M. N. , Voinea G.-D. , Lucaci M.-E.

Archives of Metallurgy and Materials

2023

tom Vol. 68, iss. 4

1439--1446

This study analyses the three-point bending behavior of Nylon 12 (PA12) specimens produced using two additive manufacturing technologies (i.e., fused filament fabrication and selective laser sintering). A Nylon 12 commercially available filament (from Fiberlab S.A.) was selected to employ the fused filament fabrication method (FFF) with a Prusa 3D desktop printer, whereas Nylon 12 sintering powder (from Formlabs Inc.) was chosen for selective laser sintering (SLS) using a benchtop industrial SLS platform, Formlabs Fuse 1, with a powder refresh ratio of 30%. The bending strength and flexural elasticity moduli were determined by following ISO 178:2019 standard specifications to assess the effect of two different technologies on the mechanical behavior of three-point bending specimens produced in three distinct build orientations (i.e., 0°, 45°, and 90°) relative to the printing platform. One-way ANOVA analysis, Tukey’s HSD, and Games-Howell tests are considered to assess the statistical variability of experimental data and compare the mean values of bending strength and flexural moduli. The testing results for the three orientations under question show notable differences and interesting similarities either in terms of strength or elasticity response for a significance p-level of 0.05.

Ocena jakości odnowy przewodów kanalizacyjnych analizą korelacyjną

63%

Raganowicz A. , Dziopak J.

tom z. 63, nr 2/II

383--397

W artykule opisano badania laboratoryjne parametrów fizyko-mechanicznych 25 próbek rękawów systemu RS CityLiner, które zainstalowano w ramach renowacji sieci kanalizacyjnej gminy Unterhaching. Dla dwóch z badanych parametrów – modułu sprężystości (E) i wytrzymałości na zginanie (σ) przeprowadzono statystyczno-stochastyczną analizę korelacyjną. Badania modelowe wykazały liniową zależność według Pearsona między modułem sprężystości i wytrzymałością na zginanie.

The article describes the laboratory testing of physical-mechanical parameters of 25 samples of RS CityLining, which are installed as part of the renovation of the sewerage system municipality Unterhaching. For two parameters - the modulus of elasticity (E) and the flexural modulus (σ) – the statistical-stochastic correlation analysis was performed. The results of modeling showed a linear relationship by Pearson between the modulus of elasticity and the flexural modulus.