Search results

The significant contribution of the sliding parameter to the reduction in wear of polymer composites has rarely been reported.
Schematic two-dimensional drawing of pultrusion processing. 2.3 Taguchi Design of Experiments and Optimization Design of experiment (DOE) is a controlled and systematic method for the collection and analysis of large amounts of data in order to obtain a comprehensive assessment of the factors under investigation.
All the wear and friction data were obtained from the average of three replicates for each sample. 3.0 Result and discussion 3.1 Taguchi analysis for wear rate and average COF Experiment results and calculated S/N ratio of wear rate and average COF of kenaf fiber/polyester composites are shown in Table 3.

Recycling of natural fibres (NF) by incorporating them into composites to manufacture renewable and biodegradable materials has drawn considerable attention as a biodegradable reinforcing material [6,7] and can help in waste reduction and reduce the cost of the composites developed [8].
These data indicated that all DPF modified composite samples showed significant resistance against both brown and white rot fungi used in this trial when compared to the control solid wood samples (Pinus sylvestris) Figures 3 and 4.
The obtained data revealed an increasing in the mass loss percentages by the addition of DPF.

Meanwhile, according to a great deal of experimental data [7], when the vertical compressive stress is considerably large, the principal tensile stress theory underestimates masonry shear strength because of not considering the physical properties of materials.
The Least Energy Consumption Principle The theory of minimum energy and the minimum rate of energy dissipation have been applied to flow around bluff bodies, stability of falling bodies, statics and dynamics of gas bubbles, generation of ripples and dunes, and drag reduction by suspended load.
From the existing experimental data, Eq. 21 accords basically with experimental results [7,26], and can express three types of failure models (i.e. shear-friction, shear-compression and diagonal compression) by one formula.

Stress concentration factors calculated by finite element model analysis were found to be higher than those interpolated from the experimental data.
Using the experimental data in Table 4 and Minitab software, S/N ratio, response table for S/N ratios, main effect plots for mean and analysis of variance for the tensile strength were obtained as shown in Table 6, Table 7, Fig.5, and Table 8 respectively.
When welding speed became high, deposition of molten electrode, penetration and heat input is too low causing reduction in the rate of increase of the tensile strength.

The monotonic Swift strain hardening law was considered with data from balanced biaxial tension and the anisotropic Yld2000-2d yield function was used to characterize plastic anisotropy, which results from texture.
The micro-scale approaches can be used to fine-tune the macroscopic material description and to conduct virtual experiments to determine input data otherwise difficult to measure experimentally.
Barlat, Parameter reduction for the Yld2004-18p yield criterion, Int.

Full scale heap validation has not been attempted, however, due both to lack of sufficient full scale data in the open literature and the fact that solution flow in heaps is highly non-ideal and no longer sufficiently represented by the pseudo2D model.
Comprehensive exercises of this nature have been done by Petersen and Dixon for heap leaching on chalcocite [16, 10, 12] and sphalerite ores [10, 11], where large sets of test data were available.
Finkelstein in: Leaching and Reduction in Hydrometallurgy, edited by A.R.

Discussion Figure 8 exhibits the kinetic fitting curve of the experimental data of catalysis, fitting the formula , where C0 refers to the initial concentration of the organic solution, and Ct refers to the concentration of the organic solution at reaction time t.
These VO states trap light carriers, suppress the recombination of carriers (as seen in Fig. 9a) and assist in the surface photocatalytic oxidation reduction process (as seen in Fig. 9a), thereby enhancing the photocatalytic activity of the sample[31].
Table 1 XPS data of two kinds of oxygen at the surface of ZnO nanoparticles Samples Binding energy of two kinds of oxygen (eV) The percent of oxygen to total oxygen Binding energy of Zn (eV) Surface adsorbed oxygen Lattice oxygen MEA (550 ℃) 531.379 530.049 47.5 52.5 1021.268 DEA (450 ℃) 531.276 529.956 29.8 70.2 1021.606 TEA (550 ℃) 531.573 530.023 39.8 60.2 1021.212 Figure Captions Figure 1XRD 2θ scans of ZnO synthesized with different stabilizers: (a) DEA.

In another series of tests conducted by the US Defense Threat Reduction Agency, several different types of steel moment resisting connections were first subjected to a blast then loaded in catenary mode to determine their residual strength ([69]).
Early research in this area was quite limited, primarily because of the difficulty of obtaining high quality experimental data and setting up and running meaningful simulations of progressive collapse.
· Perhaps the greatest need at the moment is high quality test data at the component and system level.

Load-ram displacement data were recorded for each extrusion.
Worth noticing is the study by Osawa et al.[24] of forged PP that displayed strong loss of turbidity as a result of strain-induced spherulitic size reduction.
The measured load–displacement data were converted to average stress-strain curves.

Table 3 Relative intensity data of the deconvoluted C1s spectra of untreated, air (40s), N2 (40s) and H2O (40s) plasma treated wool.
The presence of amide peptide bonds is more visible although some of them could be hydrolysed as a result of subsequent enzymatic treatment. 0 10 20 30 40 50 60 Enzyme A Enzyme B LTP/enzyme 4%, 60 min LTP/enzyme 1%, 60 min LTP/enzyme 4%, 15 min LTP/enzyme 1%, 15 min LTP treated Untreated 654 32 1 6 5 4 3 2 1 Area shrinkage, %From relative intensity data of deconvoluted XPS S(2p) spectra we learned that LTP treated wool produced an increase in signal intensity at 168 eV, indicating oxidation of disulfide bonds to the S6+ form as a result of the formation of cysteic acid and probable presence of more than one sulphur oxidation species [38].
LTP treatment of wool could increase the apparent dyeing rate by reduction of the surface barrier effect without any change in diffusion rate within the bulk phase.