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Online since: January 2019
Authors: Hong Wei Li, Peng Fei Zhang, Dong Xu Li, Jian Ming Li, Hai Yang, Nai Guang Wei
In the chemical vapor deposited zinc sulfide, it often appears obvious light and dark growth bands along the growth direction, which will affect the homogeneity of optical properties of CVD ZnS and the efficiency of subsequent heat treatment.
Its unique set of properties extends its usefulness to long-wave infrared window material and all-wave photoelectric window material.
Scattering is the main factor affecting the visible-light transmittance of CVD ZnS.
(4) According to the formula, the degree of super cooling and the diffusion abilities of reactants are the main factors affecting the nucleation rate.
Physical Properties of Materials. 1ed.Beihang University Press. (2004)
Its unique set of properties extends its usefulness to long-wave infrared window material and all-wave photoelectric window material.
Scattering is the main factor affecting the visible-light transmittance of CVD ZnS.
(4) According to the formula, the degree of super cooling and the diffusion abilities of reactants are the main factors affecting the nucleation rate.
Physical Properties of Materials. 1ed.Beihang University Press. (2004)
Online since: December 2016
Authors: Patrik Bayer, Martin Vyšvařil, Tomáš Žižlavský
The applied limestone aggregate is convenient to lime-based mortars and the addition of limestone fines contributes to better mechanical properties of lime mortars.
Alvarez, Masonry repair lime based mortars: factors affecting the mechanical behaviour, Cem.
Pozo-Antonio, Evolution of mechanical properties and drying shrinkage in lime-based and lime cement-based mortars with pure limestone aggregate, Constr.
Alvarez, Mechanical properties of naturally hydraulic lime based mortars, Cem.
Papayiannai, The role of aggregate on the structure and properties of lime mortars, Cem.
Alvarez, Masonry repair lime based mortars: factors affecting the mechanical behaviour, Cem.
Pozo-Antonio, Evolution of mechanical properties and drying shrinkage in lime-based and lime cement-based mortars with pure limestone aggregate, Constr.
Alvarez, Mechanical properties of naturally hydraulic lime based mortars, Cem.
Papayiannai, The role of aggregate on the structure and properties of lime mortars, Cem.
Analysis of Mechanics Characteristics of Prestressed Steel Beam in High Temperature (Fire) Condition
Online since: August 2013
Authors: Qiang Sun, Ding Tang Wang, Wei Tian
Therefore, the great energy inside the unprotected prestressed steel cables and steel’s inability to resist high temperature may, once caught in fire, probably lead to the collapse of the whole structure as a result of several factors such as inner force redistribution and the deterioration of structural steel property.
(2) Prestressed loss of steel cables considering high temperature (fire) Prestressed structure and prestressed loss of structure elements are key to affecting its bearing capacity[9].
The mechanical property of structural steel in high temperature can be calculated by using experiment fitting fomula of Tongji University[1].
Therefore, prestressed loss in high temperature is also one of the key factors that affect the stability bearing capacity of structural elements.
Based on analysis above, the effect that the above factors have on structural elements stability bearing capacity should be considered in practical project and some corresponding measures should be taken such as controlling the tension control force, choosing low relaxation cables and setting up fire isolation layer and protection coatings to ensure normal use of the structure.
(2) Prestressed loss of steel cables considering high temperature (fire) Prestressed structure and prestressed loss of structure elements are key to affecting its bearing capacity[9].
The mechanical property of structural steel in high temperature can be calculated by using experiment fitting fomula of Tongji University[1].
Therefore, prestressed loss in high temperature is also one of the key factors that affect the stability bearing capacity of structural elements.
Based on analysis above, the effect that the above factors have on structural elements stability bearing capacity should be considered in practical project and some corresponding measures should be taken such as controlling the tension control force, choosing low relaxation cables and setting up fire isolation layer and protection coatings to ensure normal use of the structure.
Online since: October 2010
Authors: Ruben Bartali, V. Micheli, G. Gottardi, I. Luciu, N. Laidani
Hydrogen effect on structure and mechanical properties of ZnO films deposited in Ar/H2 plasma
R.
In the present work the mechanical properties of ZnO thin films, deposited on Si (100) substrates, were studied using the nanoindentation technique.
Aim of the work was the evaluation of the effect of H2 introduction in the plasma phase on the film structure and on its mechanical properties.
The previous results we showed that the presence of hydrogen in the plasma phase represents a key factor for the ZnO synthesis affecting the structural properties.
On the other hand, the coatings deposited in Ar/H2 atmosphere showed similar grain size, while the mechanical properties strongly change.
In the present work the mechanical properties of ZnO thin films, deposited on Si (100) substrates, were studied using the nanoindentation technique.
Aim of the work was the evaluation of the effect of H2 introduction in the plasma phase on the film structure and on its mechanical properties.
The previous results we showed that the presence of hydrogen in the plasma phase represents a key factor for the ZnO synthesis affecting the structural properties.
On the other hand, the coatings deposited in Ar/H2 atmosphere showed similar grain size, while the mechanical properties strongly change.
Online since: October 2010
Authors: Xiao Ling Wu, Fei Ren
The Construction of the RBF Neural Network Prediction Model on the Cylinder Liner
The determination of the input factors.
Although there are more factors affecting laser surface hardening index in the establishment of the RBF network model, the main impact factors should be used as the parameters of the input layer of RBF network.
Through the analysis, the output factors of the prediction model are the surface hardness (HV) and the hardened depth H (mm) after laser surface hardening of HT150 cylinder liner, and the input factors of the artificial neural network prediction model of laser surface hardening index on the cylinder liner are laser power P, scanning speed V and diameter D.
The neuronal number in the hidden layer is an important factor affecting the performance of RBF network.
Convergence Properties of Radial basis Function.
Although there are more factors affecting laser surface hardening index in the establishment of the RBF network model, the main impact factors should be used as the parameters of the input layer of RBF network.
Through the analysis, the output factors of the prediction model are the surface hardness (HV) and the hardened depth H (mm) after laser surface hardening of HT150 cylinder liner, and the input factors of the artificial neural network prediction model of laser surface hardening index on the cylinder liner are laser power P, scanning speed V and diameter D.
The neuronal number in the hidden layer is an important factor affecting the performance of RBF network.
Convergence Properties of Radial basis Function.
Online since: August 2021
Authors: Hendri Widiyandari, Oki Ade Putra, Berlian Muhammad Ilham
Optimizing the physicochemical properties of nanofibers membranes as a batteries separator through microstructure, morphological analysis, porosity, mechanical properties and thermal shrinkage ratio.
Mechanical properties of nanofiber membrane.
The separator is a component that functions as a safety on the battery; thus, the battery needs to have good mechanical properties.
The mechanical properties of the separator are known by performing the tensile strength test and the membrane separator elongation test.
Mechanical properties were consisting of tensile strength and elongation in Table 3.
Mechanical properties of nanofiber membrane.
The separator is a component that functions as a safety on the battery; thus, the battery needs to have good mechanical properties.
The mechanical properties of the separator are known by performing the tensile strength test and the membrane separator elongation test.
Mechanical properties were consisting of tensile strength and elongation in Table 3.
Online since: September 2013
Authors: Zhi Yuan Pan, Xiang Liu
The key of affecting the application of embedded fiber optic sensor is the interface strength of fiber layers and bonding strength between the fiber and composite materials.
The main factors affecting the interface performance during the uniaxial tensile process is studied by the experiments, and the effect of strain rate on interface bonding strength is analyzed.
Therefore, when the strain rate is large than 1.0-1.5, the dynamic fatigue properties of fibers mainly show the coating rate effect.
Mechanical properties of composite materials with integrated embedded sensor networks[J].
Characterization of the aramid/epoxy interfacial properties by means of pull-out test and influence of water absorption[J].
The main factors affecting the interface performance during the uniaxial tensile process is studied by the experiments, and the effect of strain rate on interface bonding strength is analyzed.
Therefore, when the strain rate is large than 1.0-1.5, the dynamic fatigue properties of fibers mainly show the coating rate effect.
Mechanical properties of composite materials with integrated embedded sensor networks[J].
Characterization of the aramid/epoxy interfacial properties by means of pull-out test and influence of water absorption[J].
Online since: March 2012
Authors: Xin Hua Ji, Xiao Chuan Zhang, Ri Cao Wang
Their mechanical properties attract attentions from professional visitors and researchers.
It is a difficult work to test the mechanical properties as the paper pulps are thin, anisotropic and sometimes wet.
From the displacement field strain distributions were obtained and the mechanical properties of the paper pulp compression molding material were evaluated.
Though many experiments have been carried out, none of them came down to the mechanical property [3,4].
Mechanical properties analysis for the paper pulp compression molding material by DIFC method Experiment.
It is a difficult work to test the mechanical properties as the paper pulps are thin, anisotropic and sometimes wet.
From the displacement field strain distributions were obtained and the mechanical properties of the paper pulp compression molding material were evaluated.
Though many experiments have been carried out, none of them came down to the mechanical property [3,4].
Mechanical properties analysis for the paper pulp compression molding material by DIFC method Experiment.
Online since: June 2014
Authors: Jaromír Drápala, Michaela Štamborská, Miroslav Kvíčala
Human bones mechanical properties depend on gender, age and health status [10].
Many papers related to the porous biocompatible materials mechanical properties were published in the past.
Kurtz, Laser surface treatment to improve mechanical properties of cast titanium.
Hanada, Microstructures and Mechanical Properties of Porosity-Graded Pure Titanium Compacts.
Lee, Space-holder effect on designing pore structure and determining mechanical properties in porous titanium.
Many papers related to the porous biocompatible materials mechanical properties were published in the past.
Kurtz, Laser surface treatment to improve mechanical properties of cast titanium.
Hanada, Microstructures and Mechanical Properties of Porosity-Graded Pure Titanium Compacts.
Lee, Space-holder effect on designing pore structure and determining mechanical properties in porous titanium.
Online since: January 2014
Authors: Lucjan Śnieżek, Tomasz Ślęzak
Fatigue Properties and Cracking of High Strength Steel S1100QL Welded Joints
SLEZAK Tomasz1, a, SNIEZEK Lucjan1,b
1Military University of Technology, Faculty of Mechanical Engineering,
Department of Machine Building, 2 gen.
The place of crack initiation in laser welds depends rather on the structural factors than stress concentration.
Mechanical properties and chemical composition are showed in Table 1.
Mechanical properties and chemical composition of S1100QL steel Mechanical properties Chemical composition Wt [%] sY [MPa] sU [MPa] A [%] C Si Mn Cr Mo Ni V 1197 1363 11,8 0,17 0,40 1,06 0,70 0,69 2,02 0,07 There were examined the elements with full penetration V-butt welds (Fig. 1) made by two techniques: GSAW (welding consumable: Ø1,2mm Union X-96IG filler; shielding gas: Ar + 18% CO2) and laser beam (CO2 laser: Pmax = 5 kW, E ≈ 35 kW/mm2).
This phenomenon may indicate that the influence of welded joint shape ratio and connected with them stress concentration was less important, and the importance of local mechanical properties in the HAZ regions increased.
The place of crack initiation in laser welds depends rather on the structural factors than stress concentration.
Mechanical properties and chemical composition are showed in Table 1.
Mechanical properties and chemical composition of S1100QL steel Mechanical properties Chemical composition Wt [%] sY [MPa] sU [MPa] A [%] C Si Mn Cr Mo Ni V 1197 1363 11,8 0,17 0,40 1,06 0,70 0,69 2,02 0,07 There were examined the elements with full penetration V-butt welds (Fig. 1) made by two techniques: GSAW (welding consumable: Ø1,2mm Union X-96IG filler; shielding gas: Ar + 18% CO2) and laser beam (CO2 laser: Pmax = 5 kW, E ≈ 35 kW/mm2).
This phenomenon may indicate that the influence of welded joint shape ratio and connected with them stress concentration was less important, and the importance of local mechanical properties in the HAZ regions increased.