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Online since: March 2021
Authors: Wan Mohd Nazri Wan Abdul Rahman, Nor Yuziah Mohd Yunus, Siti Noorbaini Sarmin, Nur Sakinah Mohamed Tamat
This cleaner and rougher surface would increase the number of possible interaction sites, thereby improving mechanical adhesion of wood composite [28].
Bajwa, Dried distillers’ grains with soluble as a multifunctional filler in low density wood particleboards.
Bajwa, Dried distillers’ grains with soluble as a multifunctional filler in low density wood particleboards.
Online since: August 2023
Authors: Masanobu Sato, Yasutoshi Okuno, Naozumi Fujiwara, Ryuichi Seki, Momoji Kubo
The simulations were carried out in an NVT ensemble, where the number of particles (N), volume (V), and temperature (T) were kept constant throughout the simulation.
Kubo, "Molecular-Level Elucidation of a Fracture Process in Slide-Ring Gels via Coarse-Grained Molecular Dynamics Simulations", Macromolecules, vol. 55, no. 6, pp. 1946-1956, 2022/03/22 2022, doi: 10.1021/acs.macromol.1c01981
Kubo, "Molecular-Level Elucidation of a Fracture Process in Slide-Ring Gels via Coarse-Grained Molecular Dynamics Simulations", Macromolecules, vol. 55, no. 6, pp. 1946-1956, 2022/03/22 2022, doi: 10.1021/acs.macromol.1c01981
Online since: June 2014
Authors: Zhong Han Chen
Whether the number of accidents or fatalities account for 40 percent or more.
Table 1 The physical and mechanical parameters of roadway surrounding rock Lithologies Density /kg•m-3 Modulus /GPa Poisson's ratio Cohesion /MPa Internal friction angle /° Tensile strength /MPa Siltstone 2757 4.870 0.25 1.87 24.35 1.491 Mudstone 2523 1.206 0.38 0.940 18.21 0.883 Fine-grained sandstone 1304 3.876 0.28 2.830 31.25 1.434 Sandy mudstone 2566 3.632 0.35 2.120 26.033 1.796 Coalbed 1392 1.834 0.18 0.818 15.209 0.726 Simulation results and analysis 2.1 The analysis of surrounding rock displacement and stress (a) Displacement Monitoring curve (b)The cloud chart of surrounding rock displacement Fig.1 The deformation of roadway surrounding rock (a) The cloud chart of minimum principal stress (b) Roadway plastic zone Fig.2 The stress contour & state of roadway surrounding rock Figure 1 shows the deformation of surrounding rock.
Table 1 The physical and mechanical parameters of roadway surrounding rock Lithologies Density /kg•m-3 Modulus /GPa Poisson's ratio Cohesion /MPa Internal friction angle /° Tensile strength /MPa Siltstone 2757 4.870 0.25 1.87 24.35 1.491 Mudstone 2523 1.206 0.38 0.940 18.21 0.883 Fine-grained sandstone 1304 3.876 0.28 2.830 31.25 1.434 Sandy mudstone 2566 3.632 0.35 2.120 26.033 1.796 Coalbed 1392 1.834 0.18 0.818 15.209 0.726 Simulation results and analysis 2.1 The analysis of surrounding rock displacement and stress (a) Displacement Monitoring curve (b)The cloud chart of surrounding rock displacement Fig.1 The deformation of roadway surrounding rock (a) The cloud chart of minimum principal stress (b) Roadway plastic zone Fig.2 The stress contour & state of roadway surrounding rock Figure 1 shows the deformation of surrounding rock.
Online since: March 2013
Authors: Bin Tang, Jun Wei Qiao, Heng Peng Wang, Hui Jun Yang
Thereby, graphite slip easily along the grain under the smaller shear stress, and graphite peeled off had strong adsorption ability to the clean surface.
Fig. 7 The EDX analysis on the worn surface of carbon/copper composites impregnated with (a) 25 wt. % sodium silicate; (b) 30 wt. % sodium silicate; (c) 35 wt. % sodium silicate As those shown in Fig. 7 (a), large numbers of Fe, Cr and Ni elements are found on the worn surface of composite at 25 wt. % of sodium silicate, which are transferred to the surface of sample from the steel ring, indicating that severe adhesive wear took place.
Fig. 7 The EDX analysis on the worn surface of carbon/copper composites impregnated with (a) 25 wt. % sodium silicate; (b) 30 wt. % sodium silicate; (c) 35 wt. % sodium silicate As those shown in Fig. 7 (a), large numbers of Fe, Cr and Ni elements are found on the worn surface of composite at 25 wt. % of sodium silicate, which are transferred to the surface of sample from the steel ring, indicating that severe adhesive wear took place.
Online since: March 2013
Authors: Zhi Meng Guo, Tao Shi, Lin Gao
The reaction is 3TiO2 + 4Al +3C = 3TiC + 2Al2O3, the powder is in accordance with the number of stoichiometric ratio [13].
When containing Fe mass fraction of 30%, wear resistance of the coating is the most excellent, and the grains in the coating are relatively small and uniform.
When containing Fe mass fraction of 30%, wear resistance of the coating is the most excellent, and the grains in the coating are relatively small and uniform.
Online since: August 2009
Authors: Qiao Ling Li, Yong Fei Wang, Cun Rui Zhang
The grain size and morphology were determined
using transmission electron microscopy (TEM).
1-α-Fe2O3
2-α-FeOOH
2θ(
o)
Figure 1
XRD spectra of the precursor and of the prepared α-Fe2O3 sample
3.
As shown in the literature [22], in the initial period of crystal growth the higher the reaction velocity, the greater was the number of microcrystal particles obtained, and a finer product was prepared.
As shown in the literature [22], in the initial period of crystal growth the higher the reaction velocity, the greater was the number of microcrystal particles obtained, and a finer product was prepared.
Online since: June 2012
Authors: Pu Zhang, Pei Quan Guo, Yan Ke Cao, Xiao Wei Wang, Li Zhao
The fine grain cemented carbide can withstand high temperature cutting in particular, with high strength and impact toughness, applicable to the production of dry cutting drill bit and milling cutter.
The development of high speed cutting machine tool technology to create favorable conditions for the realization of dry cutting .For precision cutting machine tools, monitoring system should be installed on the machine tools to detect the temperature of the cutting area, the changes of cutting force and tool wear, And with the machine tool compensation device in order to facilitate chip removal, dry cutting machine tools in the structure should use vertical spindle and tilting the bed to facilitate a large number of eager debris discharged as far as possible.
The development of high speed cutting machine tool technology to create favorable conditions for the realization of dry cutting .For precision cutting machine tools, monitoring system should be installed on the machine tools to detect the temperature of the cutting area, the changes of cutting force and tool wear, And with the machine tool compensation device in order to facilitate chip removal, dry cutting machine tools in the structure should use vertical spindle and tilting the bed to facilitate a large number of eager debris discharged as far as possible.
Online since: September 2011
Authors: Qing Biao Wang
Since it can be controlled easily, the number, place, depth, direction and size of applying pre-stressed of the installed pre-stressed anchorage cable can be adjusted according to the actual demand
For example, in the hard fine-grained granite, the measured pre-stressed loss of an anchorage cable (120*Φ5 mm) is 8.8%, with installation load 2400KN and persistent load 2160KN.
For example, in the hard fine-grained granite, the measured pre-stressed loss of an anchorage cable (120*Φ5 mm) is 8.8%, with installation load 2400KN and persistent load 2160KN.
Online since: December 2013
Authors: Hao Kun Song
The grain crops are mainly highland barley, barley and potato, etc.
In the course of actual assessment, sampling investigation was conducted to 32 households in Wenhai Village, accounting for 53.3% of the total number of 60 households in the village, and accounting for 72.7% of the households installed and used solar energy water heaters.
In the course of actual assessment, sampling investigation was conducted to 32 households in Wenhai Village, accounting for 53.3% of the total number of 60 households in the village, and accounting for 72.7% of the households installed and used solar energy water heaters.