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Online since: June 2011
Authors: Wen Zheng Zhang, Zhang Zhi Shi
This consideration is consistent with the well-known results of grain boundaries: The energy cusps only exist for the geometries where the dislocation model is applicable.
Thus, the number of the O-cell walls around each O-point is the same as the number of admissible Burgers vectors in lattice a.
Corresponding to a selected reference lattice a, the number of DgP-I’s is same as that of gP-a’s.
The up limit of the number candidates of singular interfaces is probably the same as the number of singular surfaces, which is often restricted by the number of gP-a’s.
Table 1 shows the number of POPs, the number of DgP-I(’s) normal to a POP, and the set(s) of dislocations in a POP for different O-elements.
Thus, the number of the O-cell walls around each O-point is the same as the number of admissible Burgers vectors in lattice a.
Corresponding to a selected reference lattice a, the number of DgP-I’s is same as that of gP-a’s.
The up limit of the number candidates of singular interfaces is probably the same as the number of singular surfaces, which is often restricted by the number of gP-a’s.
Table 1 shows the number of POPs, the number of DgP-I(’s) normal to a POP, and the set(s) of dislocations in a POP for different O-elements.
Online since: January 2013
Authors: Ivana Atanasovska, Radivoje Mitrovic, Dejan Momcilovic
,n, where n is the number of discrete values for the selected parameters.
These points correspond to the moments when the number of simultaneously meshed teeth pairs change.
The standard basic rack module and number of teeth were also predefined [5].
For this reason upper and lower limits are specified as a function of the number of teeth [10, 11].
Gliha, Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation, International Journal of Fatigue, 33 (2011) 1505–1513.
These points correspond to the moments when the number of simultaneously meshed teeth pairs change.
The standard basic rack module and number of teeth were also predefined [5].
For this reason upper and lower limits are specified as a function of the number of teeth [10, 11].
Gliha, Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation, International Journal of Fatigue, 33 (2011) 1505–1513.
Online since: July 2011
Authors: Ionut Popovici, Cosmina Toader, Maria Duta, Mirabela Gosman, Dana Perniu
The literature mentions vibrations in the region: 1620 cm-1 [9], 1635, 1639, 1639, 1621 cm-1 [10], 1630 cm-1 [2], the different positions being explained by different coordination numbers in the complexes.
The highest roughness corresponds to the sample containing micelles in the precursor solution, where nucleation can start near the film surface and nano-grains can form, as nucleation center, in the nano-reactor represented by the micelle.
Acknowledgements This work was supported by CNCSIS_UEFISCDI project number PNII – IDEI 840/2008, Romania.
The highest roughness corresponds to the sample containing micelles in the precursor solution, where nucleation can start near the film surface and nano-grains can form, as nucleation center, in the nano-reactor represented by the micelle.
Acknowledgements This work was supported by CNCSIS_UEFISCDI project number PNII – IDEI 840/2008, Romania.
Online since: January 2010
Authors: Toshiyuki Takagi, Takanori Takeno, Hiroyuki Miki
Depending on the deposition
condition, the microstructure of an Me-DLC coating is basically nanometer-sized metal grains
dispersed in amorphous hydrogenated carbon host matrix.
As can be seen in the figure, the friction coefficients of both W-DLC coatings increased with increasing cycle number.
Mechanisms for such friction behavior are still not clear but the W-DLC layer plays an important role in the reduction of the number of cycles required for the completion of the running-in process.
As can be seen in the figure, the friction coefficients of both W-DLC coatings increased with increasing cycle number.
Mechanisms for such friction behavior are still not clear but the W-DLC layer plays an important role in the reduction of the number of cycles required for the completion of the running-in process.
Online since: December 2011
Authors: Di Li, Ying Jun Jiang
Satisfying the deviations
Graded broken stone
Aggregate property
Aggregate gradation
particle model converted into round shape
micro-mechanic parameters
Grain flow model
Simulation test
Simulation results
Sample molding
Testing process
Generation of virtual samples
simulated loading process
Laboratory test
Test result
simulated testing conditions
Reliability analysis
the CBR Numerical Value Testing Method for Graded
not satisfying the deviations
Numerical simulation
Laboratory test
Contact constitutive model
Simulated Load Plate
Simulated Pressure Head
Figure 3-1 Construction Principles for CBR Numerical Experiment on Graded Macadam
5cm
5cm
5cm
Simulated Load Plate
12cm
15cm
Figure 3-2 Schematic Drawing for the Loading Process of the CBR Numerical Experiment
The CBR laboratory test and Numerical Value Simulation were carried out according to the grading in Table 3-1.
Table 3-1 Comparison between the CBR Actual Measurement Results and Simulated Results Serial number Mass percentage passing the following sieve pores (mm) Actual measured value (%) Simulated value (%) Deviation (%) Average deviation (%) 31.5 19 9.5 4.75 2.36 0.6 0.075 1 100 64 52 40 34 25 15 495 525 6.06 5.02 2 100 64 52 40 30 17 7 595 627 5.37 3 100 61 48 35 30 22 13 518 552 6.56 4 100 61 48 35 26 15 6 655 676 3.21 5 100 58 44 30 25 18 11 626 642 2.56 6 100 58 44 30 22 13 5 692 736 6.36 According to Table 3-1, deviations between CBR simulated values and actual values of each gradation are all within 7%.
Acknowledgement The project was supported by the Special Fund for Basic Scientific Research of Central Colleges, Chang’an University (item number: CHD2011ZY007), Chang’an University basic research support program and Traffic Paving Materials Ministry of education Engineering Research Center.
Table 3-1 Comparison between the CBR Actual Measurement Results and Simulated Results Serial number Mass percentage passing the following sieve pores (mm) Actual measured value (%) Simulated value (%) Deviation (%) Average deviation (%) 31.5 19 9.5 4.75 2.36 0.6 0.075 1 100 64 52 40 34 25 15 495 525 6.06 5.02 2 100 64 52 40 30 17 7 595 627 5.37 3 100 61 48 35 30 22 13 518 552 6.56 4 100 61 48 35 26 15 6 655 676 3.21 5 100 58 44 30 25 18 11 626 642 2.56 6 100 58 44 30 22 13 5 692 736 6.36 According to Table 3-1, deviations between CBR simulated values and actual values of each gradation are all within 7%.
Acknowledgement The project was supported by the Special Fund for Basic Scientific Research of Central Colleges, Chang’an University (item number: CHD2011ZY007), Chang’an University basic research support program and Traffic Paving Materials Ministry of education Engineering Research Center.
Online since: October 2010
Authors: B. De Filippo, L. Campanella, A. Brotzu, S. Natali, D. Ferro
EDS analysis carried out on pit show spectra similar to those reported in Fig. 2 (zone 2) and in
figure 3 (zone 4).They grow under the specimens surface following the bronze grain structure.
However it has been observed that even if the global patina thickness grow with the number of exposition cycles, it becomes more and more less compact.
The 0 cycle points are those of the original bronze, while the others represent the behavior after different number of cycles.
However it has been observed that even if the global patina thickness grow with the number of exposition cycles, it becomes more and more less compact.
The 0 cycle points are those of the original bronze, while the others represent the behavior after different number of cycles.
Online since: February 2011
Authors: Lian Qi Zhu
Traditional soil erosion research needs a large number of field investigation and work, which takes too much time and can’t calculate accurately in specific region, in addition, it is also difficult to obtain the dynamic change information of soil erosion.
(3) In formula(3), Sn=1-Sd/100; Sd, Si, Cl and C are content of sand grain, silt, clay and organic material.
Technical Bulletin Number 1768[R].
(3) In formula(3), Sn=1-Sd/100; Sd, Si, Cl and C are content of sand grain, silt, clay and organic material.
Technical Bulletin Number 1768[R].
Online since: August 2014
Authors: Ane Martínez-de-Guereñu, Aitor Lasaosa, Kizkitza Gurruchaga, Virginia García Navas
The 180º domain walls are pinned by obstacles such as defects of the microstructure, grain boundaries, dislocations or precipitates, and need energy to move from these pinning sites.
The amplitude and the number of MBN pulses depend on the number and morphology of the obstacles and on the derivative of the magnetic field applied.
The amplitude and the number of MBN pulses depend on the number and morphology of the obstacles and on the derivative of the magnetic field applied.
Online since: September 2016
Authors: Maria Antonietta Aiello, Marianovella Leone, Francesco Micelli, Giuseppe Centonze, Daniele Colonna
The class including the major number of fiber length was 20-25 mm (20.5%), as shown in Fig. 4.
Water, two different grain sizes of limestone aggregates and locally available sand were also used.
A total number of twelve panels have been realized (Fig 9), varying the ordinary steel reinforcement when reinforced concrete is applied.
Water, two different grain sizes of limestone aggregates and locally available sand were also used.
A total number of twelve panels have been realized (Fig 9), varying the ordinary steel reinforcement when reinforced concrete is applied.
Online since: March 2016
Authors: Jie Zhou, Tian Qi Wang, Shu Qi Zheng, Peng Peng Bai
It can be seen that for the steel corroded in pure water of 5 days, there were few corrosion products on the specimens, the surfaces of specimens were still smooth and clean, except for some pitting points, and the number of pittings did not increase with the immersion time.
There have been a number of reports on the relationship between martensite and pits.
At first, S2- ionized from H2S was attached to the surface of specimens, and pits initiated at some chemical or physical heterogeneity at the surface, such as inclusion, second phase particles, solute-segregated grain boundaries, flaws, mechanical damage, or dislocation [17, 18].
There have been a number of reports on the relationship between martensite and pits.
At first, S2- ionized from H2S was attached to the surface of specimens, and pits initiated at some chemical or physical heterogeneity at the surface, such as inclusion, second phase particles, solute-segregated grain boundaries, flaws, mechanical damage, or dislocation [17, 18].