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Online since: August 2013
Authors: Su Zhao, Ya Qing Li, Qian Wang
Influences of doped phosphors on concrete mechanical properties were studied.
The influences of doped phosphor on concrete mechanical properties.
If increases in the thickness of the concrete coating, then the light refraction, reflection and other factors will become larger, phosphor release light will be much weaker, which greatly shorten the luminescence time.
Dope CaO (xDy3+, yNa+) properties into the raw concrete materials to obtain the luminous concrete.
Influences of doped phosphors on concrete mechanical properties were studied.
The influences of doped phosphor on concrete mechanical properties.
If increases in the thickness of the concrete coating, then the light refraction, reflection and other factors will become larger, phosphor release light will be much weaker, which greatly shorten the luminescence time.
Dope CaO (xDy3+, yNa+) properties into the raw concrete materials to obtain the luminous concrete.
Influences of doped phosphors on concrete mechanical properties were studied.
Online since: February 2012
Authors: Yan Zhao, Yan Zhang, Fu Cheng Zhang
Effect of orientation relationships on the stiffness and the strength of the dual-phase metals: molecular dynamics simulation
Yan Zhang1,2,a, Yan Zhao1,b and Fucheng Zhang2,c
1 School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, P.
Orientation relationship (OR) is a crucial factor affecting the performance of the phase boundaries and the dual-phase metals.
Orientation relationship (OR) is an important factor for the phase boundaries in metals.
In view of the difficulties of experimental observation, atomic-scale simulation is an important tool for the evaluation of the properties of the micro-structures [4].
Orientation relationship (OR) is a crucial factor affecting the performance of the phase boundaries and the dual-phase metals.
Orientation relationship (OR) is an important factor for the phase boundaries in metals.
In view of the difficulties of experimental observation, atomic-scale simulation is an important tool for the evaluation of the properties of the micro-structures [4].
Online since: May 2016
Authors: Wen Hong Tao, Xing Hua Fu, Duo Zhao, Yue Zhao, Li Ping Zhao, Guo Yuan Cheng, Wen Xin Ma
The other properties was measured by aglient pricision impedance tester.
The impurity phase affected the property of ceramics.
Mechanical properties and phase transition of biomedical titanium alloy strips with initial quasi-single phase state under high-energy electropulses.
Effects of high-energy electro-pulsing treatment on microstructure, mechanical properties and corrosion behavior of Ti–6Al–4V alloy.
Influence of Ta5+Doping on the Piezoelectric Properties of KNN Ceramics[J].
The impurity phase affected the property of ceramics.
Mechanical properties and phase transition of biomedical titanium alloy strips with initial quasi-single phase state under high-energy electropulses.
Effects of high-energy electro-pulsing treatment on microstructure, mechanical properties and corrosion behavior of Ti–6Al–4V alloy.
Influence of Ta5+Doping on the Piezoelectric Properties of KNN Ceramics[J].
Online since: October 2010
Authors: Long Fei Liu, Jing Hu, Hui Qiang Li, Guang Ye Zhang
In addition, normal stress is the major factor of inducing multiple shear bands with intersecting, branching and slipping.
Introduction Recently, bulk metallic glasses (BMGs) have attracted large interest due to their unique physical, mechanical, and chemical properties [1-5].
Many macroscopic mechanical properties (e.g. plasticity and ductility) are thus controlled by the individual and collective behaviors of the shear bands.
Mechanical tests In order to conduct shear test with controlled normal stress, A special fixture was machined, which is shown in Fig.1.
In addition, normal stress is the major factor of inducing multiple shear bands with intersecting, branching and slipping.
Introduction Recently, bulk metallic glasses (BMGs) have attracted large interest due to their unique physical, mechanical, and chemical properties [1-5].
Many macroscopic mechanical properties (e.g. plasticity and ductility) are thus controlled by the individual and collective behaviors of the shear bands.
Mechanical tests In order to conduct shear test with controlled normal stress, A special fixture was machined, which is shown in Fig.1.
In addition, normal stress is the major factor of inducing multiple shear bands with intersecting, branching and slipping.
Online since: October 2011
Authors: Li Chen, Yi Zhang, Jian Kui Zhao, Chun Lin Peng
Furthermore, the affecting parameters of the beams such as length-depth ratio, axial compression ratio, boundary constraints and load conditions were discussed based on the analytical solution developed above, which were assumed subjected to the typical triangle impulsive loads.
Introduction Axially-loaded beam-type structural components can be found in almost all aerospace, civil, and mechanical systems.
When the have been known, the forced vibration can be obtained: Illustrative Example A forced vibration example is analyzed using the Spring&Mass&Elastic-Spring&Mass&Elastic beams under a uniform transverse triangle impulsive loading, assuming the following properties: ,,,,,(compressive axial load), , , ,.Analyze the following four cases: (a), ; (b) , ; (c) ,; (d) ,.
It is obvious that case (a) and case (b) have the same impulse and have almost the same curve, which suggest that the impulse is the decided factor when the last time is short.
In case (c), the maximum displacement appears in the first peak value then the amplitude of free vibration is some less, while the amplitude is almost equal the maximum displacement in case (d), which suggest the peak pressure and the last time become the fatal factors.
Introduction Axially-loaded beam-type structural components can be found in almost all aerospace, civil, and mechanical systems.
When the have been known, the forced vibration can be obtained: Illustrative Example A forced vibration example is analyzed using the Spring&Mass&Elastic-Spring&Mass&Elastic beams under a uniform transverse triangle impulsive loading, assuming the following properties: ,,,,,(compressive axial load), , , ,.Analyze the following four cases: (a), ; (b) , ; (c) ,; (d) ,.
It is obvious that case (a) and case (b) have the same impulse and have almost the same curve, which suggest that the impulse is the decided factor when the last time is short.
In case (c), the maximum displacement appears in the first peak value then the amplitude of free vibration is some less, while the amplitude is almost equal the maximum displacement in case (d), which suggest the peak pressure and the last time become the fatal factors.
Online since: December 2024
Authors: Rami Hawileh, Jamal A. Abdallah, Prathibha Gowrishankar
Few studies [22–24] observed concrete compressive strength as a critical factor affecting the FRP-concrete bonding relation, while others were inconclusive due to limited data availability [25].
Material properties Concrete.
Table 1 summarizes the mechanical properties of the CFRP sheet, laminate, and epoxy adhesive according to the manufacturer [27–29].
Hou, Influence of mechanical properties of concrete on the failure behaviour of FRP-to-concrete interface, Constr.
Miller, Analysis of Factors Affecting Effective Bond Length for Fiber Reinforced Polymer Composite Laminate Externally Bonded to Concrete Substrate, Texas Tech University, 2012
Material properties Concrete.
Table 1 summarizes the mechanical properties of the CFRP sheet, laminate, and epoxy adhesive according to the manufacturer [27–29].
Hou, Influence of mechanical properties of concrete on the failure behaviour of FRP-to-concrete interface, Constr.
Miller, Analysis of Factors Affecting Effective Bond Length for Fiber Reinforced Polymer Composite Laminate Externally Bonded to Concrete Substrate, Texas Tech University, 2012
Online since: October 2007
Authors: Hua Ding, Wen Juan Zhao, Hong Liang Hou, H.W. Xiao, X.F. Tian, J.W. Zhao
It is considered that the formation of δ
hydrides, lattice defects and alloying element diffusion are the major factors leading to the
microhardness change.
Thermo Hydrogen Treatment (THT), or the use of hydrogen as a temporary alloying element, can strongly modify the microstructures and enhance the mechanical properties of titanium alloys [2-4].
However, the influences of hydrogenation on mechanical properties especially on microhardness has been less investigated.
(3) It is considered that the formation of δ hydrides, lattice defects and alloying element diffusion are the major factors leading to α and β phases microhardness change.
Collings (Eds.): Materials Properties Handbook: Titanium Alloys, ASM, Materials Park, OH, (1990), p. 483
Thermo Hydrogen Treatment (THT), or the use of hydrogen as a temporary alloying element, can strongly modify the microstructures and enhance the mechanical properties of titanium alloys [2-4].
However, the influences of hydrogenation on mechanical properties especially on microhardness has been less investigated.
(3) It is considered that the formation of δ hydrides, lattice defects and alloying element diffusion are the major factors leading to α and β phases microhardness change.
Collings (Eds.): Materials Properties Handbook: Titanium Alloys, ASM, Materials Park, OH, (1990), p. 483
Online since: September 2011
Authors: Yan Mei Zhang, Yu Chai Sun, Zhong Hao Cheng
The chemical entities were shown in table 1
Table 1 Chemical entities of several stainless steel [2]
Steel
C
Si
Mn
P
S
Ni
Cr
Mo
316L
≤0.030
≤1.00
≤2.00
≤0.045
≤0.03
12.00~15.00
16.00~18.00
2.00~3.00
Mechanical Properties of Pure Stainless Fiber and Yarn
The fiber’s mechanical characteristics play an important role during the processing of fabric production.
Among the mechanical properties, the frictional behavior greatly affects their processing, their properties, and the performance of the final products.
The tensile properties of fiber are accepted as one of the most important parameters for assessment of fiber quality.
The tensile properties decide the performance of knitting and the properties of the final textile structure.
The influence factor of tensile force during knock-over process was shown in figure 2.
Among the mechanical properties, the frictional behavior greatly affects their processing, their properties, and the performance of the final products.
The tensile properties of fiber are accepted as one of the most important parameters for assessment of fiber quality.
The tensile properties decide the performance of knitting and the properties of the final textile structure.
The influence factor of tensile force during knock-over process was shown in figure 2.
Online since: June 2013
Authors: Emmanuelle Vidal-Sallé, Charlotte Florimond, Hossein Ramezani-Dana
In order to be able to properly evaluate the in-use mechanical properties of high performance composite materials, it is useful to identify all the critical operations of the forming process which can degrade the row materials (i.e. the yarns for continuous fibre reinforcements).
Introduction The increasing use of composite materials for structural parts implies an increase of their mechanical properties for a decreasing cost.
The same studies showed that the weaving process itself has a great influence on the final mechanical properties of the textile reinforcement.
That effect is not exactly the same for the warp and weft directions but both are affected.
Reproducing the loom conditions As mentioned in the introduction, friction is one of the most critical phenomena which participate to the degradation of the mechanical properties of textile reinforcements during the weaving process.
Introduction The increasing use of composite materials for structural parts implies an increase of their mechanical properties for a decreasing cost.
The same studies showed that the weaving process itself has a great influence on the final mechanical properties of the textile reinforcement.
That effect is not exactly the same for the warp and weft directions but both are affected.
Reproducing the loom conditions As mentioned in the introduction, friction is one of the most critical phenomena which participate to the degradation of the mechanical properties of textile reinforcements during the weaving process.
Online since: May 2013
Authors: Juan Wang, Jin Zhou, Si Yu Lai
Finite Element Analysis of Chromium Layer for Cold Roller based on Material Properties and Mechanics Properties
Juan Wang1, a, Siyu Lai2, b, Jin Zhou3, c
1College of Computer Science, China West Normal University, NanChong, China
2 Department of Medical Imaging, North Sichuan Medical College, NanChong, China
3 Materials and Metallurgy Engineering Institute, Wu Han, China
awjuan0712@126.com, blsy_791211@126.com, cZZ_JJ013@126.com
Keywords: finite element method, chromium plating, hardness, thickness, stress
Abstract.
Table 1 Parameters for finite element model Ingot size /mm 1200×200×10 Roller size / mm D750×1500 Rolling speed /mm·s-1 3000 Roller diameter /mm 750 Layer Vickers hardness /MPa 9000, 10000, 11000 Roller Rockwell hardness /HRD 74, 78, 84 Layer thickness /μm 5, 10, 15 Number of layers 1, 2, 3 Fig. 1 Finite element model The model took various factors into account, including the gravitational boundary condition and the rolling speed, which is a dynamic rolling model, and is coincide with the actual rolling conditions.
The heat conduction coefficient between ingot and roller affected by such factors as composite of ingot, composite of roller and rolling speed, and the actual value is not easy to detect, which is ranges from 17 to 57kW / (m2·K) and is relevant to the rolling pressure.
Wear is caused by grinding from material and roller which is subject to periodic load, and mechanical fatigue will appear on surface.
Chinese Journal of Mechanical Engineering 2008, 42 (1): 190-194
Table 1 Parameters for finite element model Ingot size /mm 1200×200×10 Roller size / mm D750×1500 Rolling speed /mm·s-1 3000 Roller diameter /mm 750 Layer Vickers hardness /MPa 9000, 10000, 11000 Roller Rockwell hardness /HRD 74, 78, 84 Layer thickness /μm 5, 10, 15 Number of layers 1, 2, 3 Fig. 1 Finite element model The model took various factors into account, including the gravitational boundary condition and the rolling speed, which is a dynamic rolling model, and is coincide with the actual rolling conditions.
The heat conduction coefficient between ingot and roller affected by such factors as composite of ingot, composite of roller and rolling speed, and the actual value is not easy to detect, which is ranges from 17 to 57kW / (m2·K) and is relevant to the rolling pressure.
Wear is caused by grinding from material and roller which is subject to periodic load, and mechanical fatigue will appear on surface.
Chinese Journal of Mechanical Engineering 2008, 42 (1): 190-194