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Online since: August 2007
Authors: Paulo N.B. Reis, Marcelo F.S.F. de Moura, Ana M. Amaro, A.G. Magalhães
Introduction Impact damage is considered the primary cause of in-service delamination in composites giving reductions of the compressive residual strength up to 60% [1-2].
On the other hand, Amaro et al [3] studied the residual flexural strength in carbon-fibre-reinforced epoxy laminates after low velocity impact and observed also a significant reduction on the flexural strength.
The method requires the local strengths (σu,i, i=I, II, III) and the critical strain energies release rates (Gic) as inputted data parameters.
Online since: June 2010
Authors: Kateryna Bazaka, Mohan V. Jacob, Elena P. Ivanova
., Chicago, Illinois, USA) was used for the statistical analysis of the data.
Comparative FTIR and Raman studies demonstrated a notable reduction of oxygen containing moieties, and loss of some monomer structures, such as unsaturation, in polymer thin film samples.
The reduction in chemical functionality was more profound in the case of films deposited at increased RF power levels, due to the increased ionisation and consequent enhanced fragmentation of the terpinen-4-ol molecule.
Online since: March 2004
Authors: Yoichi Nishino
The ln � versus 1/T plots (�, resistivity; T, temperature) for the data on Fe2VAl become almost linear in the temperature interval 400 – 800 K, and an energy gap of approximately 0.1 eV is deduced from its slope.
A substantial reduction in the resistivity at around room temperature certainly acts in favor of the development of thermoelectric materials.
We conclude that a substantial shift of EF from the center of the pseudogap due to doping is responsible for a large enhancement in the Seebeck coefficient and for a significant reduction in the low-temperature resistivity.
Online since: January 2013
Authors: Hao Pang, Xue Ping Li, Su Jing Jin, Peng Wei, Hui Ping Li
It can be seen from the data that DrGmq<0 in all reactions, so these reactions can occur spontaneously.
However, when V(SO2) gets larger than 0.35m/s, η will be affected by the reduction of flue gas residence time seriously, and its value will reduce.
Fig. 8 shows that η decreases along of the reduction of red mud slurry’s pH value.
Online since: September 2013
Authors: Abdul Waris, M. Nurul Subkhi, Zaki Su'ud
Cell and burn up calculations were run on SRAC code system with nuclear data library JENDL.3.2.
However, mixed nitride fuel which has high fuel density and good thermal conductivity give the most significantly reduction of excess reactivity during burn up time.
The strategy of thorium fuel cycle, fuel lattice utilization and additional protactinium give good long-life core with the reduction of excess reactivity during 10 years or more operation time.
Online since: October 2011
Authors: Chang Qing Dong, Han Fei Zhang, Guo Qin Du, Qiao Hong Dong, Cai Xia Lv, Si Mo Shi
Waste treatment aims at reduction, harmless, and resource.
Combustion can realize hence reduction, harmless, and resource[1].
Simultaneous analysis about the data in Table 2 shows that sample D has the highest volatile content and the lowest ash content.
Online since: December 2005
Authors: H. Assaf, O. Kaïtasov, E. Ntsoenzok, M.O. Ruault
A more important reduction of polarisibility can be achieved by using nonpolar bonds, such as C-C or C-H, for example, in materials like organic polymers[4].
In addition, while formation and growth mechanisms of cavities are well established in metals [14] and semiconductors [15], no data are available in the case of silicon oxide.
Both porosity and polarisability might then be responsible of the k reduction in our work.
Online since: May 2015
Authors: Octavian Bologa, Sever Gabriel Racz, Cristina Biris, Claudia Girjob
In order to determine the forming limit curves, the authors used an experimental setup, consisting of a modular drawing device, a system for the acquisition and processing of the experimental data and the strains measurement system ARAMIS.
Thus, there were evaluated: the values and distributions of the principal strains ε1 and ε2 (Fig. 2), the values and distributions of the material thickness (for the theoretical results) and the thickness reduction (for the experimental results), respectively.
The experimental determination of the principal strains and of the thickness reduction of the test samples was carried out using the optical strains measurement system Aramis, while the loads on the test samples were measured using the force sensor of the Instron testing machine.
Online since: June 2014
Authors: Claudinei Rezende Calado, Patricia Ferreira Santos, Sidney Nicodemos da Silva, I.P. Pinheiro
The objective of the present work is to characterise the waste from the porcelanato polishing process, reduce the associated disposal problems and use the waste within a company’s own ceramic industrial processes, resulting in the reduction of raw material costs.
These results agree with those observed for the density; the reduction in the density values is associated with the increased porosity of the samples.
The linear retraction data obtained for the diameter and height dimensions of the samples in relation to the residue content of the sintered samples are shown in Fig. 6.
Online since: October 2006
Authors: S.I. Kwun, Kae Myung Kang, Jai Won Byeon
The data scatter seems to be rather large from the line regressed using exponential decay function, although AGBC was tended to increase initially and then saturated with thermal degradation time.
M6C carbides x100 Number of grain boundary carbides analyzed Fraction of M6C Carbides at Grain Boundary [%] Kinetic Energy [eV] Intensity [arbitrary] (a) (b) Fe Fe C Cr Mo C Mo Kinetic Energy [eV] Intensity [arbitrary] (a) (b) Fe Fe C Cr Mo C Mo Fig. 8 Correlation of total area of grain boundary carbides and fraction of grain boundary M6C carbides with tensile strength.� Fig. 5 Typical Auger electron spectrum for quantitative composition analysis of grain boundary carbide: (a) virgin and (b) 3700 hours.� � Fig. 6 Variation in fraction of M6C carbides at grain boundary as a function of thermal degradation time.� Fig. 7 Linear correlations of Rockwell hardness with mean size of globular and all types of carbides.� Fig. 7 shows linear correlations of HRB with both mean size of globular carbides (Sglobular) and mean size of all types of carbides (Stotal), suggesting that both empirical parameters can be utilized for monitoring hardness reduction
(1) In actual plants, the mean size of globular carbide can be measured by nondestructive replication technique, and then it can be empirically correlated with the hardness reduction through the Eq. (1).
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