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Online since: October 2010
Authors: Kai Feng Zhang, Hui Gai Wang, Fei Wang, Yan Pei Song
Through ΔH and ΔD, the friction factors (m) were obtained.
Many factors may affect the m value in practical tests such as the surface roughness, the test temperature, the strain rate, the geometry of the specimen, etc..
So the friction factor is not affected by the increase of temperature.
The friction factors at higher strain rate are obviously higher than those at lower strain rate.
The strain hardening begins to affect the flow of ring material.
Many factors may affect the m value in practical tests such as the surface roughness, the test temperature, the strain rate, the geometry of the specimen, etc..
So the friction factor is not affected by the increase of temperature.
The friction factors at higher strain rate are obviously higher than those at lower strain rate.
The strain hardening begins to affect the flow of ring material.
Online since: July 2015
Authors: Ming Hsiung Ho, Pin Ning Wang, Jung Peng Yeh
The stress and deformation of designed model with material properties were analyzed by Solidwork COSMOS module.
The analysis models and materials properties are shown in Table 2.
Material Properties DESIGNATION PROPERTIES GRADE Young Modulus (GPa) Yield Stress (MPa) Tensile Strength (MPa) Poisson Ratio AISI 1035 205 283 585 0.29 Brass 110 276 552 0.33 Boundary conditions.
It would be affected by the supporter block at clip end, and the deformation was constrained in clip tip.
Excluding the effect of stress concentration, the overall safety factor is of about at least two times.
The analysis models and materials properties are shown in Table 2.
Material Properties DESIGNATION PROPERTIES GRADE Young Modulus (GPa) Yield Stress (MPa) Tensile Strength (MPa) Poisson Ratio AISI 1035 205 283 585 0.29 Brass 110 276 552 0.33 Boundary conditions.
It would be affected by the supporter block at clip end, and the deformation was constrained in clip tip.
Excluding the effect of stress concentration, the overall safety factor is of about at least two times.
Online since: July 2011
Authors: Yan Ling Tian, Huan Ying Zheng, Zhi Ren, Ming Yue Zhou, Shuai Zhang
Simulation of temperature and stress field of titanium alloys under laser cladding
Zhi Ren, Yanling Tian*, Mingyue Zhou, Huanying Zheng and Shuai Zhang
School of Mechanical Engineering
Tianjin University
Tianjin, China
*e-mail: meytian@tju.edu.cn
Keywords:Laser cladding; Finite element method; TC4; Temperature and Stress Field
Abstract.Titanium alloys which exhibit excellent material properties like a high strength to weight ratio and good corrosion resistance have become the important structural materials in the applications of the aerospace.
In the laser cladding process, the transient and highly concentrated heat input will generate large thermal stress and deformation, which directly affect the working performance of the fixed parts.
Thermal conductivity of the powder bed The thermal properties of the powder bed, however, are a strong function of the porosity of the powder bed.
Greater von mises distributed in the powder/substrate interface for the difference of the material properties between the powder and substrate.
Thermal and mechanical finite element modeling of laser forming from metal and ceramic powders.
In the laser cladding process, the transient and highly concentrated heat input will generate large thermal stress and deformation, which directly affect the working performance of the fixed parts.
Thermal conductivity of the powder bed The thermal properties of the powder bed, however, are a strong function of the porosity of the powder bed.
Greater von mises distributed in the powder/substrate interface for the difference of the material properties between the powder and substrate.
Thermal and mechanical finite element modeling of laser forming from metal and ceramic powders.
Online since: November 2012
Authors: Qiang Song Wang, Guo Liang Xie, Xiang Peng Xiao, Lijun Peng, Bai Qing Xiong
In this study, the effect of microstructure and mechanical properties of Cu-2.1Ni-0.5Si-0.2Zr-0.05Cr leadframe alloy after cold deformation was investigated.
The relationship between mechanical and electrical properties and the microstructural parameters was characterized to optimize the thermomechanical process condition of Cu-Ni-Si-Zr -Cr alloy.
Results and discussions Mechanical properties.
It was because secondary phase precipitating process was more easily to be activated at high temperature than at low temperature during the primary stage of artificial aging and the precipitates at this period was coherent with the base lattice and then led lattice distortion, which is a key factor to get peak hardness of the alloy[14].
The key factors of effects on conductivity of solid solutions are total volume and size of the solute particle, but elements and grain boundary also substantially affect the conductivity [15].
The relationship between mechanical and electrical properties and the microstructural parameters was characterized to optimize the thermomechanical process condition of Cu-Ni-Si-Zr -Cr alloy.
Results and discussions Mechanical properties.
It was because secondary phase precipitating process was more easily to be activated at high temperature than at low temperature during the primary stage of artificial aging and the precipitates at this period was coherent with the base lattice and then led lattice distortion, which is a key factor to get peak hardness of the alloy[14].
The key factors of effects on conductivity of solid solutions are total volume and size of the solute particle, but elements and grain boundary also substantially affect the conductivity [15].
Online since: May 2020
Authors: K.S. Mitrofanova
It is known that the ultra-fine-grained structure in the material has increased physical and mechanical properties, which, in turn, favorably affects the quality of surface layer [4-12].
As a study of the roughness parameters of the machined surface was taken into account the following factors: arithmetical mean deviation of profile Ra µm; root mean square roughness – Rq, µm; the maximum height of the profile Rmax, µm; measured the height of irregularities Rz, µm; average step of roughness – Sm, µm.
R. 2018 Improving the performance properties of titanium alloy on the basis of grinding grain microstructure and surface modification. : dis. ...
Z. 2016 UFG structure and mechanical properties of magnesium alloy MG-1% CA.
Reception, structure and properties M. : Akademkniga.
As a study of the roughness parameters of the machined surface was taken into account the following factors: arithmetical mean deviation of profile Ra µm; root mean square roughness – Rq, µm; the maximum height of the profile Rmax, µm; measured the height of irregularities Rz, µm; average step of roughness – Sm, µm.
R. 2018 Improving the performance properties of titanium alloy on the basis of grinding grain microstructure and surface modification. : dis. ...
Z. 2016 UFG structure and mechanical properties of magnesium alloy MG-1% CA.
Reception, structure and properties M. : Akademkniga.
Online since: April 2010
Authors: Tomoaki Hatayama, Takashi Fuyuki, Takeshi Okamoto, Junji Murata, Kazuto Yamauchi, Hidekazu Mimura, Kenta Arima, Keita Yagi, Hideyuki Hara, Yasuhisa Sano, Shun Sadakuni, K. Tachibana, Y. Shirasawa
Degradation of device properties induced
by surface roughening is of great concern.
The surface roughening induces degradation of device properties is of great concern.
SBDs were fabricated on unprocessed and processed surfaces to evaluate their electrical properties.
The electric properties of the SBDs were evaluated by the current-voltage (I-V) curves.
The ideality factors of CARE processed samples was closed to ideal value (n=1).
The surface roughening induces degradation of device properties is of great concern.
SBDs were fabricated on unprocessed and processed surfaces to evaluate their electrical properties.
The electric properties of the SBDs were evaluated by the current-voltage (I-V) curves.
The ideality factors of CARE processed samples was closed to ideal value (n=1).
Online since: November 2016
Authors: Koji Hagihara, Haruka Araki, Takaaki Ikenishi, Takayoshi Nakano
This determination is made since only the {013} slip which exhibits significant yield-stress anomaly [20,21] can be operative in the C11b-V1 grains and the Schmid factors associated with other slip systems are negligible at the [001] loading axis [17].
Umakoshi, Mechanical properties of C40-based ternary Mo(Si,Al)2 and quaternary (Mo,Zr)(Si,Al)2 silicides, Scripta Mater. 38 (1998) 471-476
Mishima, Microstructure and mechanical properties of MoSi2/TaSi2 two-phase alloys, Intermetallics 14 (2006) 1358-1363
Nakano, Misfit strain affecting the lamellar microstructure in NbSi2/MoSi2 duplex crystals, Acta Mater. 61 (2013) 3432-3444
Yamaguchi, Microstructure and mechanical properties of MoSi2 single crystals and directionally solidified MoSi2-based alloys, Prog.
Umakoshi, Mechanical properties of C40-based ternary Mo(Si,Al)2 and quaternary (Mo,Zr)(Si,Al)2 silicides, Scripta Mater. 38 (1998) 471-476
Mishima, Microstructure and mechanical properties of MoSi2/TaSi2 two-phase alloys, Intermetallics 14 (2006) 1358-1363
Nakano, Misfit strain affecting the lamellar microstructure in NbSi2/MoSi2 duplex crystals, Acta Mater. 61 (2013) 3432-3444
Yamaguchi, Microstructure and mechanical properties of MoSi2 single crystals and directionally solidified MoSi2-based alloys, Prog.
Online since: September 2011
Authors: Liu Min, Jun Ying Tian, Mei Yan Liu
But wool raw materials can not meet the demand of textile industry, wool fiber production is influenced by many factors such as geographic conditions.
Sodium alginate produced by Shanghai cognis chemical Co., LTD Warmth retention test Warmth retention is tested according to GB/T11048-89《Testing method for warmth retention property》with ASTM plate-type fabric warm apparatus.
Dyeing properties of wool-like fabric improved also.
How Alkali Treatments Affect Selected Properties Of Polyester, Cotton and Polyester/Cotton Fabrics.
China Textile Leader.2009,(1):77~80 [5] Matsudaira Mitsuo,Matsui Masao,Changes in the Mechanical Properties and Fabric Handle of Polyester-fibre Fabrics Through the Finishing Stages[J],Journal of the Textile Institute,1992,83(1):144-155 [6] Sheth Geeta N., Musale Aparna A.
Sodium alginate produced by Shanghai cognis chemical Co., LTD Warmth retention test Warmth retention is tested according to GB/T11048-89《Testing method for warmth retention property》with ASTM plate-type fabric warm apparatus.
Dyeing properties of wool-like fabric improved also.
How Alkali Treatments Affect Selected Properties Of Polyester, Cotton and Polyester/Cotton Fabrics.
China Textile Leader.2009,(1):77~80 [5] Matsudaira Mitsuo,Matsui Masao,Changes in the Mechanical Properties and Fabric Handle of Polyester-fibre Fabrics Through the Finishing Stages[J],Journal of the Textile Institute,1992,83(1):144-155 [6] Sheth Geeta N., Musale Aparna A.
Online since: September 2008
Authors: Guggi Kofod
The symmetry properties of these conditions leads to
simplifications in the analytical expressions describing the deformation under actuation, and will
therefore also simplify the discussion of the influence of the mechanical properties of a material
upon actuation properties, which is the topic of this paper.
As discussed by Wissler and Mazza [11], the VHB 4910 material has probably changed its composition since it was first used in 2000 [1], which would affect hyper-elastic properties.
The effects on dielectric properties were also discussed in [11].
The mechanical properties of the electrodes have been disregarded entirely, however, the mechanical response of the electrodes can be boxed with that of the dielectric elastomer into a composite stress-strain behaviour of the actuator as a whole [3].
and 1 are identical apart from a factor '1x .
As discussed by Wissler and Mazza [11], the VHB 4910 material has probably changed its composition since it was first used in 2000 [1], which would affect hyper-elastic properties.
The effects on dielectric properties were also discussed in [11].
The mechanical properties of the electrodes have been disregarded entirely, however, the mechanical response of the electrodes can be boxed with that of the dielectric elastomer into a composite stress-strain behaviour of the actuator as a whole [3].
and 1 are identical apart from a factor '1x .
Online since: May 2012
Authors: Zhi Zeng Yang
Use of total flooding of high expansion foam extinguishing system for the underground garage fire, can effectively eliminate the fire smoke, reduce the fire damage and loss of property.
Don't have to be alone to wind up Specification when setting the mechanical smoke exhaust system should be set at the same time, air inlet system, and air volume of not less than 50% of the volume of smoke.
Water damage High expansion foam is a kind of mechanical air foam, commonly used foam extinguishing agent including YEGZ3A, YEGZ6A, YEDGO6 and YEGD3 four models.
Foam generator to generate the high expansion foam fire burn and later, due to their stability and other factors affecting the foam will damage phenomenon.
Foam breakage speed will directly affect the exhaust velocity effect.
Don't have to be alone to wind up Specification when setting the mechanical smoke exhaust system should be set at the same time, air inlet system, and air volume of not less than 50% of the volume of smoke.
Water damage High expansion foam is a kind of mechanical air foam, commonly used foam extinguishing agent including YEGZ3A, YEGZ6A, YEDGO6 and YEGD3 four models.
Foam generator to generate the high expansion foam fire burn and later, due to their stability and other factors affecting the foam will damage phenomenon.
Foam breakage speed will directly affect the exhaust velocity effect.