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Online since: October 2010
Authors: Osamu Odawara
In the latter, the TiB2-Al composite synthesis under a free fall MGE, for example, has made clear that the lack of mass migration and the improvement of wetting between TiB2 and Al under the MGE affect the formation of a fine and dense cermet-like structure in the products.
With this intermediate metal layer, the produced ceramic lined pipe has not only high strength and toughness of metals and high resistance against corrosion and abrasion of ceramics but also high resistance against thermal and mechanical shock.
The experimental date on mechanical properties of the produced long ceramic-lined pipe shows that the differences of these properties in the direction of pipe length are negligibly small within the present testing precision, except for the data near the pipe end.
The duration of produced ceramic and metal in molten phases would be an important factor.
Therefore, it is considered that heat and gas gravitational transportation affects the combustion propagation.
With this intermediate metal layer, the produced ceramic lined pipe has not only high strength and toughness of metals and high resistance against corrosion and abrasion of ceramics but also high resistance against thermal and mechanical shock.
The experimental date on mechanical properties of the produced long ceramic-lined pipe shows that the differences of these properties in the direction of pipe length are negligibly small within the present testing precision, except for the data near the pipe end.
The duration of produced ceramic and metal in molten phases would be an important factor.
Therefore, it is considered that heat and gas gravitational transportation affects the combustion propagation.
Online since: May 2011
Authors: Xiao Fei Wang, Kang Sheng Zhang, Jin Ping Liu, Zheng Huan Hu
Considering the little distinction in chemical compositions and strong similarity in mechanical property between these two materials, 21-4N can be replaced by 21-2N in the simulation.
(2) Horizontal stress and mean stress are relatively greatly affected by forming angle.
And the stage greatly affected by forming angle is stretching stage.
Maximum shear stress and maximum shear strain are not greatly affected by forming angle
Mechanical Research & Application Vol.(20)(2007) , p. 47–49, in Chinese
(2) Horizontal stress and mean stress are relatively greatly affected by forming angle.
And the stage greatly affected by forming angle is stretching stage.
Maximum shear stress and maximum shear strain are not greatly affected by forming angle
Mechanical Research & Application Vol.(20)(2007) , p. 47–49, in Chinese
Online since: October 2010
Authors: Adele Carradó, Olga Sokolova, Heinz Palkowski
These articles present an analysis of stress-strain properties, the changes in the
structure and other important factors as the forming behaviour of the sandwich material and also the
behaviour of sandwich components in the construction subject to complex loading.
These defects could decrease the bonding capacity, the mechanical properties and, in general, the overall quality of the sandwich materials.
Mechanical properties for the 316L skin, the PP-PE core and SMS, taken at room temperature and for three angles α to RD.
YS and TS have been found to be affected by corona treatment indicating that these composite properties were highly sensitive to interfacial phenomena.
The fields of application were pointed out corresponding to the obtained mechanical properties of reinforced sandwich structures.
These defects could decrease the bonding capacity, the mechanical properties and, in general, the overall quality of the sandwich materials.
Mechanical properties for the 316L skin, the PP-PE core and SMS, taken at room temperature and for three angles α to RD.
YS and TS have been found to be affected by corona treatment indicating that these composite properties were highly sensitive to interfacial phenomena.
The fields of application were pointed out corresponding to the obtained mechanical properties of reinforced sandwich structures.
Online since: February 2014
Authors: Zuhairi Ibrahim, R. Muhammad, Y. Wahab, Zulkafli Othaman, S. Sakrani, Rahmalan Ahamad
Transmission electron microscopy and X-Ray diffraction analysis were carried out to investigate the effects of V/III ratio and nanowire diameter on structural properties and crystallinity changes.
This is because the lack of nanowire due to partly broken and lying on the substrate caused by factors described above.
The resulting crystal shape is accordance with the properties of hexagonal shape in magnified TEM results.
Growth and optical properties of nanometer-scale GaAs and InAs whiskers.
The Effect of V/III ratio and catalyst particle size on the crystal structure and optical properties of InP NWs.
This is because the lack of nanowire due to partly broken and lying on the substrate caused by factors described above.
The resulting crystal shape is accordance with the properties of hexagonal shape in magnified TEM results.
Growth and optical properties of nanometer-scale GaAs and InAs whiskers.
The Effect of V/III ratio and catalyst particle size on the crystal structure and optical properties of InP NWs.
Online since: January 2019
Authors: Ziga Kresevic, Claudia Volberg
Lectures from Antivilla
Most thermal insulation materials base their thermal performance and properties on the encapsulated air inside their porous structure.
New socio-economic and cultural patterns are largely affecting the way we live, work, and use our free time.
The conditions affecting the responsiveness include e.g. hot day vs. cold night, seasonal changes or reaction to sudden change like storm or strong winds.
Affordability of space is therefore becoming a factor that often defines people’s lives instead of providing opportunities.
On the other hand, a right amount desired air leaks could make mechanical ventilation obsolete and result in a gradual exchange of air with lower energy loss.
New socio-economic and cultural patterns are largely affecting the way we live, work, and use our free time.
The conditions affecting the responsiveness include e.g. hot day vs. cold night, seasonal changes or reaction to sudden change like storm or strong winds.
Affordability of space is therefore becoming a factor that often defines people’s lives instead of providing opportunities.
On the other hand, a right amount desired air leaks could make mechanical ventilation obsolete and result in a gradual exchange of air with lower energy loss.
Online since: January 2013
Authors: Milan Brandt, Qian Chu Liu, Shou Jin Sun, Martin Leary, S. Feih, Joe Elambasseril
The Ti64 SLM components show similar or superior physical and mechanical properties compared to the precursor material without employing any post-processing methods [5].
The mechanical properties of the components are sensitive to their microstructures [6] and depend on the SLM process parameters which are discussed in detail in section 2.
Mechanical Properties of SLM Ti64 Alloy.
Robust optimisation outcomes can only be achieved if based on a comprehensive understanding of the associated mechanical properties and manufacturing limitations.
Semiatin, Mechanical Properties of Laser-Deposited Ti-6Al-4V, in D.L.
The mechanical properties of the components are sensitive to their microstructures [6] and depend on the SLM process parameters which are discussed in detail in section 2.
Mechanical Properties of SLM Ti64 Alloy.
Robust optimisation outcomes can only be achieved if based on a comprehensive understanding of the associated mechanical properties and manufacturing limitations.
Semiatin, Mechanical Properties of Laser-Deposited Ti-6Al-4V, in D.L.
Online since: September 2013
Authors: Damian J. Kotecki
From the 1870s onwards, corrosion resisting properties of iron-chromium alloys were known.
Either approach provides better as-welded mechanical properties in the weld metal.
Prediction of Austenitic Weld Metal Microstructure and Properties.
Prediction of Austenitic Weld Metal Microstructure and Properties.
Creep Crack Growth Properties of Type 308 Austenitic Stainless Steel Weld Metals.
Either approach provides better as-welded mechanical properties in the weld metal.
Prediction of Austenitic Weld Metal Microstructure and Properties.
Prediction of Austenitic Weld Metal Microstructure and Properties.
Creep Crack Growth Properties of Type 308 Austenitic Stainless Steel Weld Metals.
Online since: August 2004
Authors: Jung Hak Park, Man Yong Choi, Won Tae Kim
Box 102, Yusung, Daejon, 305-600, Korea
2
Department of Bio-Mechanical Engineering, Kongju National University,
Chungnam, 340-702, Korea
Keywords: Non-destructive Testing (NDT), Infrared (IR) Thermography, Thermal Imaging, Finite
Volume Method (FVM), Heat Transfer
Abstract.
According to the distance reaching the defects from the surface, the thermal imaging affected by temperature differences are compared, The simulations are also evaluated with the thermal pattern acquired by a qualitative IR thermography in a local district of the concrete deck Nomenclature i, j subscript, tensor, - g gravitation, m2/sec T temperature, ℃ u velocity, m/sec x coordinate, m symbol β therrmal expansion factor, 1/℃ ρ density, m3/kg ∆ difference, - Introduction Thermal imaging technology using the infrared thermography is one of prospective non-contact and non-destructive technologies.
Over the year, the importance of infrared imaging technology in NDT for mechanical and electrical facilities has been increasing popularity mainly because it makes remote inspection possible by sensing the thermal radiation emitted from the warm object.
Dimension and property of numerical modeling Table 2.
Table 2 shows properties of steel concrete sub-material and defect material of reinforced concrete.
According to the distance reaching the defects from the surface, the thermal imaging affected by temperature differences are compared, The simulations are also evaluated with the thermal pattern acquired by a qualitative IR thermography in a local district of the concrete deck Nomenclature i, j subscript, tensor, - g gravitation, m2/sec T temperature, ℃ u velocity, m/sec x coordinate, m symbol β therrmal expansion factor, 1/℃ ρ density, m3/kg ∆ difference, - Introduction Thermal imaging technology using the infrared thermography is one of prospective non-contact and non-destructive technologies.
Over the year, the importance of infrared imaging technology in NDT for mechanical and electrical facilities has been increasing popularity mainly because it makes remote inspection possible by sensing the thermal radiation emitted from the warm object.
Dimension and property of numerical modeling Table 2.
Table 2 shows properties of steel concrete sub-material and defect material of reinforced concrete.
Online since: November 2011
Authors: Shou Jun Peng, Wei Wang, Wei Guo Liu
The total pressure force affected the dynamics of the moving plate, is known as squeeze-film damping.
As an important factor of sliping micro-mechanical system performance, squeeze-film damping has always been used to modulate Q value of the micro-resonator[1].
It can be used to model squeeze thin-film damping of MEMS unperforated plate structure in three different flow regimes: continuum theory, high Knudsen number, and high Knudsen number with accommodation factors.
If we make use of appropriate substitution of material properties such that: , , , the degree of freedom TEMP will be analogous to pressure.
Make appropriate substitution of material properties and the elements of FEM must be replaced as requirement in Section.Ⅲ, the equation of squeeze thin-film theory and heat transfer analogy theory can be equivalent when we do FEM simulation analyze.
As an important factor of sliping micro-mechanical system performance, squeeze-film damping has always been used to modulate Q value of the micro-resonator[1].
It can be used to model squeeze thin-film damping of MEMS unperforated plate structure in three different flow regimes: continuum theory, high Knudsen number, and high Knudsen number with accommodation factors.
If we make use of appropriate substitution of material properties such that: , , , the degree of freedom TEMP will be analogous to pressure.
Make appropriate substitution of material properties and the elements of FEM must be replaced as requirement in Section.Ⅲ, the equation of squeeze thin-film theory and heat transfer analogy theory can be equivalent when we do FEM simulation analyze.
Online since: August 2014
Authors: Peter Tuleja, Ľuboslava Šidlovská
ŠIDLOVSKÁ Ľuboslava1,b
1Technical University in Kosice, Faculty of Mechanical Engineering, Department of Production Technique and Robotics, Nemcovej 32, Košice, Slovakia
apeter.tuleja@tuke.sk, bluboslava.sidlovska@tuke.sk
Keywords: vacuum, end effector, vacuum or suction cup, unilateral gripping
Abstract.
Following factors are the bottom line: · weight of OM; · dynamic property of handling equipment (robot, manipulator); · terms of suction cups loading balance; · size condition and decomposition of mass of OM; · size and layout of suitable areas for gripping of suction cup; · surface characteristics of OM.
Moreover, the higher quality of vacuum that should be reached by ejector, the higher the demands on the power supply of energy (compressed air), Fig. 2 Gripping force of the suction cup is proportionally affected by its size, Fig. 3, which is useful almost without any limits.
When calculating the real force by relations (1), respectively (2) the theoretical force must be multiplied by , where t refers to as safety factor.
Equation for the calculation of real grip force so takes the form [N] (4) wherein safety factor t is determined depending on the orientation of the active handling acceleration.
Following factors are the bottom line: · weight of OM; · dynamic property of handling equipment (robot, manipulator); · terms of suction cups loading balance; · size condition and decomposition of mass of OM; · size and layout of suitable areas for gripping of suction cup; · surface characteristics of OM.
Moreover, the higher quality of vacuum that should be reached by ejector, the higher the demands on the power supply of energy (compressed air), Fig. 2 Gripping force of the suction cup is proportionally affected by its size, Fig. 3, which is useful almost without any limits.
When calculating the real force by relations (1), respectively (2) the theoretical force must be multiplied by , where t refers to as safety factor.
Equation for the calculation of real grip force so takes the form [N] (4) wherein safety factor t is determined depending on the orientation of the active handling acceleration.