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Online since: February 2012
Authors: Jia Yang
Abstract: The powder of different mixed with crushed the grain size.
Introduction Old tires in the shattered into the rubber powder after the size according to the number of orders into different powder.
The grain size different application of the powder of different fields.
Online since: September 2014
Authors: Ivan Bataev, Anatoly Bataev, Alexey Ruktuev, Mikhail Golkovski, Vitaly Samoylenko, Pavel Komarov
Introduction An increased interest in Ti-Ta alloys has been displayed in recent decades because of their extremely high corrosion resistance in a number of aggressive media.
The aim of the research was to study corrosion resistance and a number of other characteristics of coatings formed by multiple cladding using the proposed method.
The general method of powder composition cladding, in particular Ti alloys, is described in a number of papers [4-8].
While etching, equiaxed grains are revealed against their background.
Microhardness of the sample with four-layer cladding The destruction of coating occurs over the boundaries of prior grains of the β-phase, with a peculiar surface geometry being formed (Fig. 4a).
Online since: December 2024
Authors: Peng Liu, Jie Zhang, Qi Fu Zhang, She Ming Jiang, Yuan Peng Li
For hot-dip Galvalume coating, the coating surface consists of a large number of small dense spangles, resulting in a coating with strong gloss and contrast.
A 100 mm straight line was drawn across the uniform spangle area of the hot-dip Galvalume coatings and the number of spangles crossed by the line was counted by using an Olympus SZX7 optical microscope.
Five lines were drawn for each sample and the number of spangles was averaged.
Consistent with the pattern observed in the micromorphology, the dendrite arm spacing decreases with the increase of the SET, which fully demonstrates that the increase in the SET has the effect of refining the grains of the coating layer and that the effect is weakened with the increase of the SET.
Besides, the number of dendrites in the Galvalune coating increased.
Online since: July 2013
Authors: Gen Yin Cheng, Sheng Chen Yu, Zhi Yong Wei, Shao Jie Chen, You Cheng
Monitored objects and service operations can be dynamically displayed in the interface, commonly used services’ information and data shown in the above list view column; not registered in the system operation of the service information at the following list column view, when we select the host you want to view, list view column in the interface below will show the process’s name which opened by the corresponding host, the information of opened ports, as well as the executable file’s path in the system, and the process’s ID number, for example, if the FTP service is opened and use the default port 21, then the service information display in the corresponding cell which its corresponding host and service in the above interface, if the system comes with the FTP service is not open, it’s not necessarily that the host can’t provide FTP service, then you can to see the port and open process from the list below, if the process of Sery-U is open, its indicating that the the host still provides
The communication of the muffler numerical simulation model has three different forms of communication: 1) communication caused by finite element nodes: in the fine-grained decomposition, each node represents a task, communication between each node and a number of nodes around; 2) communication caused by global calculation; 3) communication caused by physical calculation. ③ Combination: According to the performance requirements and implementation costs to examine the results of the first two stages。
In this paper, when the use of fine-grained domain decomposition, the number of tasks seems to be large, should be combined: a small number of combinations (each task from one node to four nodes) can reduce the communication caused by node calculation.  
Online since: October 2011
Authors: Kai Qu, Xu Dong Zhang, Jie Zhang
The results show that the remains strain increased following the increase of cyclic number.
During the service life of a solid rocket motor, the solid propellant grain as well as other structural components of the motor is subjected to cyclic loading during storage, transportation, and operation.
The cyclic number was recorded when the specimens were pulled to failure.
Dissipative energy vs. cyclic number under cyclic loading.
In order to study conveniently, the natural logarithm of cyclic numbers was taken.
Online since: July 2021
Authors: Viktor Kolokhov
The addiction of the "ultrasound speed - the voltage level in fractions of the destructive " on the surfaces of sample number 1: a - front; b - rear.
Results of the measurement of the propagation time of ultrasonic oscillations when changing the pressing force for samples of the first series on the surface, which during manufacture was in contact with the metal formwork for sample number: a – 1; b – 2; c – 3; d – 4 Some results [8] are given in Fig. 7 and Fig. 8.
Here are the studies that were conducted with different compositions of heavy and fine-grained concrete.
A significant number of results are outside the confidence interval.
Similar studies with fine-grained concrete [9] showed similar results.
Online since: February 2012
Authors: Vedran Glavas, Thomas Böhlke, Dominique Daniel, Christian Leppin
It has been shown in the past that phenomenological material models cannot account for all effects taking place in deep drawing simulations or have an enormous number of parameters, which are not accessible in the usual set of experiments performed.
With the use of the elastic Green strain tensor Ee = (FTe F e − I)/2 (2) the Kirchhoff stress is defined using the elastic stiffness tensor C of the single crystal τ = F e ˜C[Ee]F e . (3) Then the flow rule can be written in the following form: ˙F pF −1 p = ∑ α ˙γ0 sgn(τα) � � � τα τC � � �m ˜Mα (4) with α being the number of active slip systems, τα the resolved shear stress in the α-th slip system.
In the following, a reference volume V containing a finite number of grains with discrete orientations and volume fractions νβ is assumed.
Then the effective Kirchhoff stress can be computed from the grainwise homogeneous Kirchhoff stress tensors τβ via ¯τ = 1 V ∫ V τ dV = ∑ β νβτβ (9) As a consequence of the Taylor assumption, the algorithmic tangent stiffness operator is the algorithmic mean of the algorithmic stiffness tensors C alg β for each grain ¯Calg = 1 V ∫ V Calg dV = ∑ β νβC alg β . (10) Results The first step of the beverage can forming process (cupping) has been computed and compared to the experimental results.
In order min: 0.2 max: 2.4 (100) min: 0.16 max: 3.2 (111) min: 0.17 max: 2.4 (100) min: 0.1 max: 3.9 (111) Fig. 2: (110) and (111) pole figures for the full data set with 3414x4 texture components (left) and for the reduced data set with 72x4 texture components (right) 0 50 100 150 200 250 300 350 0 0.01 0.02 0.03 0.04 0.05 sigma [MPa] epsilon [-] experiment 3414x4 ori 72x4 ori 270 280 290 300 310 320 0 10 20 30 40 50 60 70 80 90 Rp0.2, Rm [MPa] angle [degree] Rp0.2 exp Rp0.2 sim Rm exp Rm sim Fig. 3: Comparison: tension test at 0◦ to RD to the simulation for different number of texture components (left) and experimental data and simulated results of Rp0.2 and Rm over angle to RD (right) to validate the computed material parameters, the experimental stress-strain curve in the RD is shown in Fig. 3 (left).
Online since: October 2014
Authors: Y. Tijjani, I.A. Rafukka, M.U. Suleiman, Bashir Ibrahim
Methods Determination of Grain Size Distribution of Chalawa Sand The stacks of sieves were arranged according to the sieve aperture with the largest aperture on top of the stack and the smallest aperture at the bottom (on top of pan).
The weights were recorded respectively in the column corresponding to the sieve mesh number and each separate sieve weight was multiplied by the preceding sieve mesh number.
Comparing the sum total of the product with the total sample weighed gives the fineness number of the sand.
Results and Discussion From Table 1 below, the grain fineness number can be determined by dividing sum product by cumulative weight of the sand retained, that is GFN = .
Online since: September 2007
Authors: Matthias Bickermann, Albrecht Winnacker, Boris M. Epelbaum, Octavian Filip
Also, the neighboring polycrystalline rim which is dominated by the more stable [0001]-oriented grains, exercises strong tension during growth on the single-crystalline area.
A large number of linear features separate small areas producing a fine structured mosaicity on the whole growth interface.
Investigation of longitudinal cuts revealed that grains from the polycrystalline rim transmit their polytype information along the c-planes into the central single-crystalline region producing large number of polytypic inclusions.
Towards the (01-10) plane, a number of smaller facets are visible on the growth interface.
It has been published that in SiC crystals grown in off-oriented directions (relative to [0001]) a large number of SF can be produced.
Online since: September 2010
Authors: E. Hernández-Sánchez, Ivan Campos-Silva, M. Ortíz-Domínguez, O. Bravo-Bárcenas, Marco Antonio Doñu-Ruíz, J. Martínez-Trinidad, Y. Domínguez-Galicia, D. Bravo-Bárcenas, J.A. Jiménez-Bernal
Since the growth of the saw-toothed boride layer is a controlled diffusion process with a highly anisotropic nature [4], higher temperatures and/or longer times encouraged increasing number of Fe2B crystals to get into contact with adjacent crystals and forced to retain an acicular shape.
The number of indentations at the boride layers was established by three experimental parameters: the boride layer thickness, the indentation impression size, and the applied load.
In brittle polycrystalline materials, the microstructure affects the indentation cracks in a number of ways, such as crack termination at porosity and/or grain boundaries normal to the crack path and crack deflection along grain boundaries.
Also, different models in the Palmqvist regime under Vickers indentation are proposed in the literature [12]: for 2/5 0.0089 0.25 2.5 (4) C v E P a K Hd da        2/5 0.0122 (5) C v EP K H da     where E is the Young modulus and vH is the hardness Vickers number.
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