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Online since: June 2021
Authors: De Fu Li, Bao Hong Zhu, Nan Nan Wang, Zhong Wen Li, Zhi Guo Liu, Si Yu Yao, Zhi Shui Yu
It is generally believed that in (α+β) type titanium alloys, the microstructure directly affects the properties.
The origin of microstructural diversity, texture, and Mechanical Properties in Electron Beam Melted Ti-6Al-4V[J].
Microstructure and mechanical properties of Ti–6Al–4V parts build by selective laser melting [J].
Graded microstructure and mechanical properties of additive manufactured Ti–6Al–4V via electron beam melting[J]. 2015, 97: 1-16
Heat treatment of Ti6Al4V produced by selective laser melting: microstructure and mechanical properties[J].
The origin of microstructural diversity, texture, and Mechanical Properties in Electron Beam Melted Ti-6Al-4V[J].
Microstructure and mechanical properties of Ti–6Al–4V parts build by selective laser melting [J].
Graded microstructure and mechanical properties of additive manufactured Ti–6Al–4V via electron beam melting[J]. 2015, 97: 1-16
Heat treatment of Ti6Al4V produced by selective laser melting: microstructure and mechanical properties[J].
Online since: February 2018
Authors: R.S. Aleena, R.S. Priyadarsini
Introduction
The dynamic development of the technical civilization depends to a greater extent on the development of the material engineering which still searches for the non-conventional materials with the better mechanical and physical properties.
The mechanical properties are given in the table1 [7].
Mechanical properties (Guo [7]) Elastic modulus E11[N/mm2] Elastic modulus E22[N/mm2] Shear modulus G12[N/mm2] Poisson’s ratio ν12 Density [kg/m3] 113970 8130 3890 .315 1560 Table 2.
The mechanical properties of the GFRP laminated plates provided by Maneesh et al [8]. are used for the analysis and are given in table 3.
Mechanical properties of the GFRP laminated plates [8] Elastic modulus E11[N/mm2] Elastic modulus E22[N/mm2] Shear modulus G12[N/mm2] Poisson’s ratio ν12 Density [kg/m3] 39860 10800 3650 0.3 1560 5.
The mechanical properties are given in the table1 [7].
Mechanical properties (Guo [7]) Elastic modulus E11[N/mm2] Elastic modulus E22[N/mm2] Shear modulus G12[N/mm2] Poisson’s ratio ν12 Density [kg/m3] 113970 8130 3890 .315 1560 Table 2.
The mechanical properties of the GFRP laminated plates provided by Maneesh et al [8]. are used for the analysis and are given in table 3.
Mechanical properties of the GFRP laminated plates [8] Elastic modulus E11[N/mm2] Elastic modulus E22[N/mm2] Shear modulus G12[N/mm2] Poisson’s ratio ν12 Density [kg/m3] 39860 10800 3650 0.3 1560 5.
Online since: April 2015
Authors: He Xin Chen, Lei Xu, Kai Wang, Jiang Long Yi, Shi Da Zheng, Chun Fu Guo
For the welding technology conditions, the weld heat input is the aggregative indicator to response the welding current, voltages and speeds, as is one of the most important factors to decide the combination properties of the welding beads [3].
Table 1 shows the chemical composition of 921A steel, and Table 2 shows its mechanical properties.
For this reason, it may be considered that there is no galvanic effect, as to improve the anti-corrosive properties of the deposited metals [9].
Under the functions of those complex factors, the deposited metals welded at 20 kJ/cm presents the poorest anti-corrosive properties compared with the other two deposited metals welded at 10 kJ/cm and 15 kJ/cm.
Nath, Mechanical and corrosion behavior of plain low carbon dual-phase steels.
Table 1 shows the chemical composition of 921A steel, and Table 2 shows its mechanical properties.
For this reason, it may be considered that there is no galvanic effect, as to improve the anti-corrosive properties of the deposited metals [9].
Under the functions of those complex factors, the deposited metals welded at 20 kJ/cm presents the poorest anti-corrosive properties compared with the other two deposited metals welded at 10 kJ/cm and 15 kJ/cm.
Nath, Mechanical and corrosion behavior of plain low carbon dual-phase steels.
Online since: March 2012
Authors: Yan Ping Shi, Shu Hua Fan
Application of Magnetoelastic Effect of Ferromagnetic Material in
Stress Measurement
Yanping Shi, Shuhua Fan
Dept. of Mechanical Engineering Huaihai Institute of Technology
Lianyungang, Jiangsu Province, China
Shiyp58@163.com
Keywords: ferromagnetic material; sensor; magnetoelastic effect; stresses measurement
Abstract.
The output characteristic of the sensor affected by field current intensity, frequency, and the gap between the probe of the sensor and the surface of the material tested was analyzed by testing.
The principle of sensor magnetoelastic effect is refers, the change of magnetism characteristic of the ferromagnetic material, when it under the mechanical stress function.
If we use a special sensor to measure the magnetic properties (permeability) changes, we can determine the change of the stress in the ferromagnetic material and the load acted on it [1].
The gap between sensor and the test sample is 0.1mm, the exciting current 50mA, the frequency 5 kHz, the test system enlargement factor 1000.
The output characteristic of the sensor affected by field current intensity, frequency, and the gap between the probe of the sensor and the surface of the material tested was analyzed by testing.
The principle of sensor magnetoelastic effect is refers, the change of magnetism characteristic of the ferromagnetic material, when it under the mechanical stress function.
If we use a special sensor to measure the magnetic properties (permeability) changes, we can determine the change of the stress in the ferromagnetic material and the load acted on it [1].
The gap between sensor and the test sample is 0.1mm, the exciting current 50mA, the frequency 5 kHz, the test system enlargement factor 1000.
Online since: February 2022
Authors: Yuri Baranov, Michail Burnashov, Andrei Katunin, Anton Tryastsin
Plastic deformation during rotary rolling leads to a change in the size of the blank for ball pins, their strength properties, surface roughness and material structure [2,3].
All this negatively affects the performance of the car’s suspension.
Based on the many experiments carried out, it can be concluded that the main factor in ensuring operability of ball joints is roughness of the head surface, which is in contact with a polymer insert.
In addition, it was found that when protection of the joint is violated, its performance is still affected by wear resistance of the polymer insert and the spherical surface of the ball pin, which depends on its hardness.
Bulletin of Mechanical Engineering, 1966, No. 5. pp. 57-60
All this negatively affects the performance of the car’s suspension.
Based on the many experiments carried out, it can be concluded that the main factor in ensuring operability of ball joints is roughness of the head surface, which is in contact with a polymer insert.
In addition, it was found that when protection of the joint is violated, its performance is still affected by wear resistance of the polymer insert and the spherical surface of the ball pin, which depends on its hardness.
Bulletin of Mechanical Engineering, 1966, No. 5. pp. 57-60
Online since: October 2014
Authors: Jie Li, Fang Wang
Introduction
At present, the building energy consumption accounts for about 30% of total energy consumption in China, which also presents a trend of rigid growth, and it is estimated that this proportion will reach 35% in 2020[1]; however, the energy consumption of doors and windows accounts for 40~50% of the total energy consumption of outer building envelope, which is the weakest link of heat transfer and air infiltration in the building envelope, and it is one of the important factors that affect the indoor thermal environment and the energy saving of building.
The door and window are the weakest link in the energy saving design of building, some designers try to reduce the area of outer door and window to reduce the energy consumption of building area, but this will not only affect the indoor environment and façade appearance, but also increase the extra lighting energy consumption of building.
Energy-saving Measures of Door and Window Improve the Optical Property, Thermal Performance of Material.
In this way, it can not only satisfy the sunshade requirement in summer, but also won’t affect the lighting and sun exposure requirement in winter, and related assembly of electric actuating mechanism can be further installed to realize intelligent and automatic control.
The ratio of window to wall should be combined to other aspects of architectural design, the architectural artistic effects and the indoor luminous environment should be adequately considered, the intensification of the heat preservation and thermal insulation of outer building envelope should not highly depend on decrease of the ratio of window to wall, and the focus of energy saving should still be put on improving the light-heat properties of the door and window.
The door and window are the weakest link in the energy saving design of building, some designers try to reduce the area of outer door and window to reduce the energy consumption of building area, but this will not only affect the indoor environment and façade appearance, but also increase the extra lighting energy consumption of building.
Energy-saving Measures of Door and Window Improve the Optical Property, Thermal Performance of Material.
In this way, it can not only satisfy the sunshade requirement in summer, but also won’t affect the lighting and sun exposure requirement in winter, and related assembly of electric actuating mechanism can be further installed to realize intelligent and automatic control.
The ratio of window to wall should be combined to other aspects of architectural design, the architectural artistic effects and the indoor luminous environment should be adequately considered, the intensification of the heat preservation and thermal insulation of outer building envelope should not highly depend on decrease of the ratio of window to wall, and the focus of energy saving should still be put on improving the light-heat properties of the door and window.
Online since: May 2011
Authors: Xiao Yong Li, Kang Xu, Si Yuan Wang
If large deformation of roadbed occurs, it would result in cracks in road surface, and the normal use and safety of road would be affected.
Padding Physical Property.
Characterizing the mechanical properties of in situ residual soil.
Confining stress dependency of mechanical properties of sands.
Variation in bearing capacity factors of dense sand assessed by model loading tests.
Padding Physical Property.
Characterizing the mechanical properties of in situ residual soil.
Confining stress dependency of mechanical properties of sands.
Variation in bearing capacity factors of dense sand assessed by model loading tests.
Online since: May 2020
Authors: S.V. Vasiliev, Yu.Yu. Fedorov, A.V. Savvina
Introduction
Epoxy resins, due to the possibility of their modification, due to the presence of reactive hydroxyl and epoxy groups, with the production of materials with high physical and mechanical properties, are still the most promising among other organic high molecular weight substances [1-3].
Composite materials based on epoxy oligomers are widely used in practice due to high adhesion, high heat resistance, low brittleness, low shrinkage during curing, stability of technological properties and several other properties.
Due to such properties, materials based on epoxy resins are widely used in various industries: as film-forming substances in the refining industry, shipbuilding, construction, etc. [4,5].
Obtaining epoxy polymer composites for construction purposes with predetermined properties is usually associated with the use of physicochemical modification methods: the introduction of solid insoluble fillers and fillers, surfactants, inert plasticizers and thinners [6-8].
The elastic properties as well as the impact strength of matrix composites depend on various factors: temperature conditions of curing, mechanochemical effects during the hardening process, but to a greater extent on the type of hardener and its concentration.
Composite materials based on epoxy oligomers are widely used in practice due to high adhesion, high heat resistance, low brittleness, low shrinkage during curing, stability of technological properties and several other properties.
Due to such properties, materials based on epoxy resins are widely used in various industries: as film-forming substances in the refining industry, shipbuilding, construction, etc. [4,5].
Obtaining epoxy polymer composites for construction purposes with predetermined properties is usually associated with the use of physicochemical modification methods: the introduction of solid insoluble fillers and fillers, surfactants, inert plasticizers and thinners [6-8].
The elastic properties as well as the impact strength of matrix composites depend on various factors: temperature conditions of curing, mechanochemical effects during the hardening process, but to a greater extent on the type of hardener and its concentration.
Online since: September 2008
Authors: Toribio F. Otero
Any
variable (mechanical, chemical, optical, magnetic..) acting on the equilibrium will induce
changes on the working potential of any device, driven by a constant current, based on this
reaction: actuating-sensing devices based on the electrochemical properties are expected.
This conformational energy is the basic magnitude for both actuating and sensing properties, opening the way for their quantification.
Moreover, the actuation of the muscle involves simultaneous sensing processes providing living creature with a perfect consciousness of both, characteristics of the mechanical movements and their interactions with the ambient: they are intelligent devices. 1 Among artificial materials chemical and physical processes linked to the electrochemistry of conducting polymers present a great deal of similitude with the above described biological processes, properties and functions, much more similar than those linked to any other artificial material (1-7 and references therein).
- Any change on the A concentration (Figure 5) or on the ionic strength of the solution will also affect the potential of the working device.
Design and structure-properties relationships.
This conformational energy is the basic magnitude for both actuating and sensing properties, opening the way for their quantification.
Moreover, the actuation of the muscle involves simultaneous sensing processes providing living creature with a perfect consciousness of both, characteristics of the mechanical movements and their interactions with the ambient: they are intelligent devices. 1 Among artificial materials chemical and physical processes linked to the electrochemistry of conducting polymers present a great deal of similitude with the above described biological processes, properties and functions, much more similar than those linked to any other artificial material (1-7 and references therein).
- Any change on the A concentration (Figure 5) or on the ionic strength of the solution will also affect the potential of the working device.
Design and structure-properties relationships.
Online since: August 2013
Authors: Xian Chang Mao, Hai Yan Lin
The rivet will pierce the upper sheet metal when semi-tubular rivet is pinned down by punch, then lower end of the semi-tubular rivet will expand in the nether sheet metal to form a mechanical mutual interlocking mechanism under the combined action of both die and punch, as shown in Fig. 5.
However, the riveting joint strength is influenced by sheet metal material properties, mould structure, riveting force, etc, and to appropriate select and optimize the technical parameters and affecting factors is the key to further develop this riveting technology.
Compared with the other riveting technology, spinning riveting needs a lower load and has uniform stress on sheet metal which is conducive to form mechanical interlock riveted joint.
However, the riveting joint strength is influenced by sheet metal material properties, mould structure, riveting force, etc, and to appropriate select and optimize the technical parameters and affecting factors is the key to further develop this riveting technology.
Compared with the other riveting technology, spinning riveting needs a lower load and has uniform stress on sheet metal which is conducive to form mechanical interlock riveted joint.