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Online since: June 2015
Authors: Jae Hoon Kim, Hoon Seok Choi
Blue line in figure 3 shows the representative stress-strain data for the type II of specimens.
Especially, the results at 900 ℃ shows a 43% reduction of compressive strength.
The relative strength for experimental and reference data were compared in figure 9.
Conversely, non coated specimen heated for 180s and coated specimen heated for 1200s sustain compressive strength at even 900 ℃, which is similar to the reference data provided by UCAR Inc [2].
The results are as follows: 1) At compressive tests of room temperature, the mean strength of ASTM specimens(1:2, standard specimen) shows 66.3 MPa which is similar to the data(67.0 MPa) provided by UCAR 2) The mean compressive strength of the type I specimen (1:1) and type II (1:0.8) show slightly higher strength than that of the standard specimen.
Online since: September 2014
Authors: Viktor Getalo, Sergej Vanyeyev
These systems provide simultaneously gas pressure reduction and control when gas expands in turbine and also generating turbine shaft duty with its conversion into electrical power.
The article is dedicated to gas flow calculation and jet-reactive turbine characteristics design by means of FlowVision software and also comparison of the obtained results with the results of process experimental data.
The comparative analysis of calculation results with the process experimental data was carried out in the work [3] as well as in the FlowVision software.
As when processing the experimental data the turbine final characteristics design was based on the obtained torsion torque values.
The variation range of feed nozzle pin stroke h, within which model turbine efficiency (specific starting torque) is maximum, coincided with the experimental data (relative error is 3% max.) and is in the interval as follows: - for bigger thrust nozzles (d1=13,7 mm) – 10mm÷13mm; - for smaller thrust nozzles (d2=15,6 mm) – 13mm÷19mm.
Online since: April 2014
Authors: Pavlo Maruschak, Igor Konovalenko, Abdellah Menou, Janette Brezinová, Roman Bishchak
Data on 10 indentations was statistically processed to obtain the average value for one experimental point.
As is known, it is the localisation of the degradation processes between rolling fibers (Fig. 2a) that causes a significant reduction in the impact toughness of the service-exposed pipelines [3, 7].
The initial information is the multivariable data, which describes the complex object in the attributive multidimensional space of characteristics.
Thus, one of the most important tasks is the automated integral analysis of the multivariable topological data with a view to their further numerical interpretation.
Maruschak Automated method for studying the deformation behavior of a material damaged by a thermal fatigue crack network, Optoelectronics, Instrumentation and Data Processing, 49 (2013) P. 243-249.
Online since: August 2013
Authors: Xi Long Ren, Xia Li
The meso-level concept of which is not only the reduction of land use of a certain highway construction project, but also the increase of economic return of the currently existing highway.
Units of evaluation indexes in evaluation index system of comprehensive evaluation on highway land intensive saving use effect are different and data of evaluation indexes varied, so a uniformed evaluation model cannot be established on the basis of the original data.
Standardization of the raw data matrix.
Some indexes, Value-added rate of roadside land, Promote resource development rate, Green belt area ratio, Soil erosion index, Arable land fragmentation degree, Ecological damage index and Loss of soil fertility index, for road completion time is not long and basic data is insufficient, did not use[6].
Online since: May 2012
Authors: Shuang Chen, Yan Tao, Sheng Hua Zhao
is the reduction factor for the number of layers.
Table 4 The specimen’s data specimens mid span deflection(mm) design limit load(KN) failure load(KN) the ratio of design limit load to failure load failure mode of bearing capacity C25 7.78 76.9 86.1 1.12 crushing concrete C30 7.50 82.6 95.3 1.15 crushing concrete C40 6.84 90.0 108.0 1.20 crushing concrete C50 6.13 94.0 116.6 1.24 balanced Failure C60 4.92 96.7 127.6 1.32 pulling CFRP apart.
In this article, according to the equations (4) to (7) and the experimental data obtained, the structural reliability of the six test beams was calculated by the use of JC method and programming of FORTRAN language.
The reason is that the sample size is too small and it results in more discrete data.
The test methods and data measurements in future studies could be improved.
Online since: November 2015
Authors: Octavian Bologa, Cristina Maria Biris, Claudia Emilia Girjob
Real-time error-compensation techniques offer a more advanced alternative that does not call for a reduction of machining federates [3].
The input data was gathered taking into consideration the experimental system, a feed drives of a CNC laser cutting machine.
The specific data for the experimental system, are: Motor rated power P - 300 [W], Motor rated armature voltage Ub - 75 [V], Motor rated torque M - 1.18 [Nm], Motor rated rotating speed n – 2500 [min-1], Motor instantaneous maximum armature current i – 40 [A], Motor armature winding resistance R - 1.1 [ Ω], Motor torque constant Kt - 0.273 [Nm/A], Motor velocity constant Kv - 0.273 [Vs/rad], Motor instantaneous maximum angular acceleration ε – 38400 [rad/s2], Motor rotor inertia Jm - 0.270 · 10-3 [ kgm2], Load inertia Jl - 2.583 · 10-3 [ kgm2], Motor viscous braking constant Bm - 3.7242 · 10-4 [Nms/rad], Load viscous braking constant Bl - 82 · 10-4 [Nms/rad], Tachometer gain Kth - 0.00668 [Vs/rad], Lead screw step – 5 [mm], Gear ratio Kg – 1, Incremental encoder gain Ke - 2500/2p [imp/rad], Mass of the slide – 30 [kg], Cutting force – 1000 [N], Sampling period T - 0.01 [s] Another parameters of the systems is continuous RMS current I = 10 A The quality of the transitory regime
ZEISS Contourecord 1600D measuring device used to verify the results of experimental research TiMS software integrated into the machine not only allows a precise acquisition of data measured contour, but a comparison of these data with the original design introduced as IGES or DXF files.
Online since: July 2015
Authors: Simone Aparecida da Silva Lins, Líbia de Sousa Conrado
Due to the wide availability of agroindustrial waste of cashew in the Northeast and the real possibility of adding value to such waste, with a significant reduction of the environmental impact caused by its accumulation, this paper proposes the use of the cashew apple bagasse as substrate semi -solid to obtain cellulase enzymes involved in the degradation of lignocellulosic materials.
The software Statistica TM (version 5.0, from Statsoft, Inc.) was used to calculate the main effects of variables and their interactions, as well as data on the analysis of variance (ANOVA).
The model had a R2 equal to 0.924, indicating that the model explained 92.4% of the variation of the experimental data.
The experimental data fitted to the linear model, explaining 92.4% of the data variation.
Online since: May 2016
Authors: Roland Rupp, Ronny Kern, Tobias Höchbauer, Michael Rüb, Constantin Csato, Florian Krippendorf, Johannes von Borany, Shavkat Akhmadaliev, Werner Schustereder
The two lines represent two different positions on the implanted 4” SiC wafer The analysis of the SIMS data shows, that a doping level of » 2.4E16/cm³ was achieved in the complete drift layer.
In addition doping data derived by CV measurements are given.
(Center line in box: median; size of box: 25%-75% range, error bar: total data range per wafer).
All data are derived at room temperature, values at x-axis are dose in 1E13/cm² (top) and implant energy in MeV (bottom) A) Leakage current at 650V; B) Breakdown voltage at 0.5mA; C) Near-surface doping measured by CV; D) Differential resistance calculated from the voltage drop at 12A and 15A Both VBR and IR_650 show clearly a very narrow (and completely Gaussian) distribution for the EFI wafers, whereas the reference wafers show a tail towards lower breakdown voltages due to doping variations towards the wafer rim (higher doping at the rim) leading to a wider box in Fig. 4 a and b.
They strictly follow the implanted dose as can be seen Fig. 4 (dose variation from 2E13/cm² to 1.5E13/cm² lead to an increase of the VBR median from 738V to 776V and a reduction of the leakage current median by a factor of 3).
Online since: January 2010
Authors: Terry R. McNelley, Srinivasan Swaminathan, E. Sarath Menon, J.Q. Su
Table 1 gives composition data for NiAl bronze and the alloy of this investigation.
The corresponding microtexture and grain boundary data in Fig. 6b and c, respectively, indicate that the multi-pass FSP has produced a random texture and misorientation distribution in the SZ.
FSP has resulted in a reduction in flow stress and increase in strain rate for the maximum value of the strain rate sensitivity coefficient, ln ln m σ ε ≡ ∂ ∂ & .
The ductility versus strain rate data illustrate the enhanced superplastic ductility of the FS'ed material.
attained at a strain rate of 10 -1 s-1, and this corresponds to the maximum m value in the stress versus strain rate data.
Online since: March 2007
Authors: Ming Hwa R. Jen, Yu Chung Tseng, P.Y. Li
The inclusion of inorganic fillers into polymers for commercial applications is primarily aimed at the cost reduction, strength, and stiffness improvements [4].
It was found that only the predicted ultimate strengths of hybrid quasi-isotropic laminates were under 10% in comparison with empirical data.
Others predicted by ROM were not close to the obtained data. 2.6 mm APC-2 thickness 0.55 mm AZ31 Sheet thickness 0.5 mm 1 2 3 4 5 (a) (b) Figure 1.
According to the published data in [12], the theoretical predication by ROM fits well with the empirical data of Mg/APC-2/Mg/APC-2/Mg composite laminates without adding nanoparticles.
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