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Online since: February 2011
Authors: Jamal A. Abdallah, Adil K. Al-Tamimi, Rami Hawileh
Extensive research investigation has been carried out for beams subjected to monotonic static loading while limited research data is available for beams subjected to cyclic loadings.
Fig. 3 Load history of the tested specimens (a) CPW1-90 (b) CPW2-90 Fig. 4 Hysteresis loops of the strengthened beams Table 3 Comparison between the tested specimens Specimen Ultimate load [kN] Maximum deflection [mm] % reduction in failure deflection compared to (MC) Failure mode MC 58 34 - Flexural CPW1-90 136 13 -38.2 Plate debonding followed by sheet rupture CPW2-90 130 10.8 -31.8 Plate debonding (a) CPW1-90 (b) CPW2-90 Fig. 5 Failure modes of the specimens tested under cyclic loading Summary In this study, three RC concrete beams were tested under four-point loading subjected to cyclic loading as a part of an extensive experimental research investigation program.
Based on the tested data, it can be concluded that: 1.
Online since: October 2017
Authors: Bambang Sunendar Purwasasmita, La Aba, Seitaro Mitsudo, Inyoman Nyoman Sudiana, Haji Aripin, Muhammad Zamrun Firihu, La Ode Ngkoimani, Komang Gde Suastika, Lina Lestari, Prima Endang Susilowati
The microstructural of sintered samples were characterized on the basis of the experimental data obtained using densification measurement method (Archimedes method), crystallization (X-ray diffraction, XRD), microstructure (Scanning electron microscope, SEM).
It is attributed to the reduction of both the open and the closed pores.
The solid line is an fitting of grain size data.
Online since: July 2011
Authors: Alessandra Buoso, Fabio Corazza, Luigi Coppola
Data indicate that – thanks to the better dispersion of nanotubes promoted by the surfactant - the pressure-sensitivity properties of cement pastes can be achieved even by using a very low percentage of CNTS (0.1% vs. cement mass).
Hence, data seem to indicate that this percentage (1.0%) of CNTs exceeds the percolation threshold value.
Finally, a negligible reduction in the electrical resistance was achieved for the cement paste with 0.1% of CNTs dispersed by method #1.
Data indicate that mortars are less pressure-sensible with respect cement pastes.
Data indicate that mortars are less pressure-sensible with respect cement pastes.
Online since: January 2016
Authors: Xi Peng Xu, Jian Yun Shen, Zheng Cai Li, Jiang Quan Wang
The results show that ultrasonic vibration makes specific sawing energy having a significant reduction during material removal process.
Data was gathered and analyzed through real-time display by the DEWE-2010 dynamic signal analyzer (Its schematic as shown in Figure 3).
Online since: October 2012
Authors: Gui Xiang Wang, Xi Hui Zhang
The copper contamination on Si wafer surface can reduce nearly 50% by adding EDTA while the addition of FA/O or AEEA in the same concentration for alkaline slurries can reach more than 70% reduction of copper contamination level.
For alkaline slurries, the data show that EDTA has no predominance compared with FA/O and AEEA.
Online since: July 2019
Authors: Massimo Durante, Antonio Formisano, Antonio Langella
In order to improve wear properties of thermosetting resins, potential solutions are the reduction of the adhesion between the counterparts and the improvement of their hardness, stiffness and compressive strength.
Finally, by examining only the data summarized in Figs. 3 and 4, that is to say the ones on FR 100 : 30 (the most performing filled resin) and under the highest contact pressure (the worst load condition), the improvement of performance goes up from the 42.3 % (resin filled with the finest particles, working against the coarsest counterface) to 89.6 % (resin filled with the coarsest particles, working against the finest counterface).
Online since: October 2007
Authors: Hai Ou Jin, David J. Lloyd, Pei Dong Wu
Two AA5754 sheets have been processed by cold rolling with 83% thickness reduction, one at room temperature and another with liquid nitrogen as coolant.
The EBSD data acquisition was carried out in a Philips XL30S field emission gun (FEG) SEM, equipped with a Nordlys II detector.
Online since: September 2005
Authors: A.K. Ivanov-Schitz, S.N. Savvin, G.N. Mazo
From this data, the microscopic information about energy and mass transport can be directly extracted and further analyzed by calculating various transport and structural quantities [41].
It is also interesting to note that in case of La1.85Sr0.15CuO3.94, gLaO2(r) and gSrO2(r) reveal two clearly resolved peaks in the "first coordination shell" in fair agreement with experimental data.
In Table 2 the metal-oxygen bond lengths estimated by the RDF peak maxima are compared to the experimental data for LaSrCuO3.61 [48] and La1.85Sr0.15CuO3.94 [49].
As one can see, the literature data taken from various sources do not agree well.
Although the direct comparison Fig. 6: Experimental and calculated oxygen diffusion coefficients in La2-xSrxCuO4-δ of our data with the experimental ones is not straightforward, it is still encouraging that the calculated activation energy (0.86 eV) coincides with the measured datum (0.84 eV) [51].
Online since: January 2017
Authors: Zhi Xue Qu, Ai Bing Du, Xi Ping Su, Xiao Xiao
These calculated results are consistent well with the experimental data of thermal conductivity of the irradiated boron carbide, which may suggest that the variation of the thermal conductivity of boron carbide is predominantly determined by the point defects scattering in the initial stage of irradiation.
Up to now, Many irradiation data have been obtained such as thermal conductivity [1], swelling [1,2], and microcracking [3,4].
It will cause the reduction of the mean free path of the phonon and further the degradation of the thermal conductivity.
Some physical parameter used in the calculation can be obtained from the experimental data of the boron carbide pellets which was fabricated by Dalian Boentan company.
This calculation results are consist with the experimental data of the thermal conductivity of the irradiated boron carbide[1].
Online since: October 2014
Authors: Bei Xiang Liu, Xiao An Long
After analyzing the data,the findings showed that (1) the traditional resistance significantly increased strength of lower extremities on both absolute and relative peak torque and power, (2) the conventional training combined with vibration training can significantly increase the peak torque of extensors in lower extremities, and (3) the authors believed that the vibration training may be a better training method to improve the strength or power in lower extremities.However, the mechanism should be further investigated. 1.
The reduction in mediolateral sway could be associated with the greater use of ankle evertors due to their strength improvement.[5] Chung et al. determined whether performing Tai Chi Chuan on a customized vibration platform could enhance balance control and lower extremity muscle power more efficiently than Tai Chi Chuan alone in an untrained young population.The results showed that the moving area in the TCV group was significantly decreased by 15.3%.
Therefore,in this study the authors have carried out an experiment on the effect of whole body vibration using isometric testing equipment to test the peak torque and power in knee joint and then analyzed the collected data.
(b) 1 min. passive rest between sets and 5 sec. between repetitions. 2.2.2 Assessment indexes After analyzing and comparing the data, the current study adopted the following indexes to assess the effect of vibration on strength of lower extremities: (a) absolute peak torque, (b) Relative peak torque, (c) absolute peak power, and (d) relative peak power. 2.3 Data analysis SPSS16.0 for windows were used in this study, Testing data are presented as x±s,independent samples t-test and paired samples t-test were used in this study.
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