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Online since: February 2021
Authors: Ubolrat Wangrakdiskul, Thanapong Poommong, Pishayuth Tubtimkeaw
Results of the experiment show that the proposed wall tile can achieve the physical properties of TIS 2508-2555.
Furthermore, energy-saving is also calculated and compared with fired wall tile which has similar properties.
After aging period, all specimens were dried at 150oC for 2 hours and then tested their mechanical and physical properties, including bending strength, water absorption, and bulk density.
After aging at room temperature for 7 and 28 days, physical properties of specimens are performed.
Fabrication and Comparison of Mechanical Properties of Hybrid GFRP Using Epoxy Modifiers.
Furthermore, energy-saving is also calculated and compared with fired wall tile which has similar properties.
After aging period, all specimens were dried at 150oC for 2 hours and then tested their mechanical and physical properties, including bending strength, water absorption, and bulk density.
After aging at room temperature for 7 and 28 days, physical properties of specimens are performed.
Fabrication and Comparison of Mechanical Properties of Hybrid GFRP Using Epoxy Modifiers.
Online since: September 2013
Authors: D.Q. Wang, C.J. Wu, R.C. Yang
Actually, aforementioned parameters affect the properties of particle damping evidently.
As a result, these factors involving inter-collisions and inter-friction should be taken into consideration in order to simulate the true operation condition for particle dampers.
The DEM simulation has been extensively developed over the years to evaluate the dissipative properties of granular materials.
When the particle damper is exerted on different positions of the beam, an obvious change of the damping properties is presented.
Esipov, Dissipative properties of vibrated granular materials, Physical Review E. 59 (1998) 4422-4425
As a result, these factors involving inter-collisions and inter-friction should be taken into consideration in order to simulate the true operation condition for particle dampers.
The DEM simulation has been extensively developed over the years to evaluate the dissipative properties of granular materials.
When the particle damper is exerted on different positions of the beam, an obvious change of the damping properties is presented.
Esipov, Dissipative properties of vibrated granular materials, Physical Review E. 59 (1998) 4422-4425
Online since: August 2013
Authors: Wei Guo Zhu, Song Chen, Jing Zhao, Hong Ji
In work process of the cone valve, because of the throttle opening and the complexity of the runner, the condition of fluid in the internal flow is very complicated, and it has great influence on various properties of the cone valve such as flow characteristic, energy utilization, fluid noise, and control performance, and so on.
As the vortex is the main factor of producing noise, the noise of cone valve in the working process is bigger.
Because of cavitation production, cavitation phenomenon appears, and this will seriously affect the performance of hydraulic system components, and make their life down.
Mechanical Design Example Tutorial[M].
China Mechanical Engineering, 1999,2
As the vortex is the main factor of producing noise, the noise of cone valve in the working process is bigger.
Because of cavitation production, cavitation phenomenon appears, and this will seriously affect the performance of hydraulic system components, and make their life down.
Mechanical Design Example Tutorial[M].
China Mechanical Engineering, 1999,2
Online since: December 2018
Authors: Mehdi Mehdi, Erik J. Hilinski, Afsaneh Edrisy, You Liang He
The microstructure and texture of the steel after final annealing have a significant effect on the magnetic properties of the lamination core.
The final annealing texture of conventionally-cold-rolled sheets usually consists of a strong <111>//ND (normal direction) texture which is detrimental to the magnetic properties [1].
The variations of the MBN parameters with respect to the annealing temperature are the combined effects of all these factors.
Kestens, Through process texture evolution and magnetic properties of high Si non-oriented electrical steels, Mater.
Hilinski, Texture and magnetic properties of non-oriented electrical steels processed by an unconventional cold rolling scheme, J.
The final annealing texture of conventionally-cold-rolled sheets usually consists of a strong <111>//ND (normal direction) texture which is detrimental to the magnetic properties [1].
The variations of the MBN parameters with respect to the annealing temperature are the combined effects of all these factors.
Kestens, Through process texture evolution and magnetic properties of high Si non-oriented electrical steels, Mater.
Hilinski, Texture and magnetic properties of non-oriented electrical steels processed by an unconventional cold rolling scheme, J.
Online since: October 2006
Authors: C.R. Tellier, G. Huve, Therese G. Leblois
Introduction
In the past few years interest in GaAs crystal has been revived firstly because this crystal has
interesting piezoelectric [1] and piezoresistive [2] properties and secondly because it is possible to
fabricate mechanical devices in GaAs by wet micromachining [3-5].
Relatively small anisotropy factor (typically less than 5) was found for these etchants.
However the anisotropy factor is small compared to that observed for silicon.
These symmetry properties are also observed for small holes.
This type of anisotropy that markedly differs to the anisotropy affecting the silicon crystal [9-11] is said to be of type 2* [4].
Relatively small anisotropy factor (typically less than 5) was found for these etchants.
However the anisotropy factor is small compared to that observed for silicon.
These symmetry properties are also observed for small holes.
This type of anisotropy that markedly differs to the anisotropy affecting the silicon crystal [9-11] is said to be of type 2* [4].
Online since: August 2014
Authors: Teng Fei Li, Ming Ming Wang, Xin Li, Cheng Liu, Hui Xia Liu
The distribution of the strain energy can also well affect the influence of local positions on the low-level modal deformation.
Choosing the design variables needs to consider many factors [8].To improve the modal performance needs to select the panels’ thickness as design variables of which the strain energy is large and the quality is smaller.
Modify the local car-body’s structure under the guidance of the strain energy and engineering experience, and optimize size under the guidance of modern finite element theory on the basis of analyzing the basic mechanical properties of the car-body.
Realize the optimization of stiffness, modal properties under the condition that body’s mass did not improve, providing a useful reference to making optimal scheme of car-body in the detailed design stage.
Chen: Chinese Journal of Mechanical Engineering, Vol. 40 (2004), pp. 195
Choosing the design variables needs to consider many factors [8].To improve the modal performance needs to select the panels’ thickness as design variables of which the strain energy is large and the quality is smaller.
Modify the local car-body’s structure under the guidance of the strain energy and engineering experience, and optimize size under the guidance of modern finite element theory on the basis of analyzing the basic mechanical properties of the car-body.
Realize the optimization of stiffness, modal properties under the condition that body’s mass did not improve, providing a useful reference to making optimal scheme of car-body in the detailed design stage.
Chen: Chinese Journal of Mechanical Engineering, Vol. 40 (2004), pp. 195
Online since: August 2015
Authors: V.M. Kornev
It can be plotted depending on both elastic plastic material properties and a crack length.
Relations (8) describe rearrangement of diagrams of quasi-brittle fracture for a composite structure with variable properties under cyclic loading.
(12) Here are Coffin’s constants numerical values of which depend on material properties [21, p. 76-77].
Savruk, Stress Intensity Factors in Cracked Bodies, vol. 2.
Murakami (ed.), Stress Intensity Factors Handbook, in 2 vol., Pergamon Press, Oxford, 1986
Relations (8) describe rearrangement of diagrams of quasi-brittle fracture for a composite structure with variable properties under cyclic loading.
(12) Here are Coffin’s constants numerical values of which depend on material properties [21, p. 76-77].
Savruk, Stress Intensity Factors in Cracked Bodies, vol. 2.
Murakami (ed.), Stress Intensity Factors Handbook, in 2 vol., Pergamon Press, Oxford, 1986
Online since: November 2012
Authors: Jin Yu Li, Hua Shu Yang, Gang Chen, Luo Shao
Water-soil interaction
Reservoir water, laterite and reinforcement materials are three major elements which influence the dam evolution [2], where the physical effect induced by chemical interactions of two former is one of main factors that determine the service life of dam.
To discover the deterioration mechanism of laterite dam induced by chloride ions in acidic water, it is necessary to discuss their properties and reaction products’ chemical and physical properties, because the properties are important factors for microstructure and engineering indices of laterite.
From the physical effect of the products, generating of CO2 gas in the double decomposition reactions that carbonates participate in is also an important factor for the deconstruction of laterite aggregates and the formation of capillary leakage channels.
The results confirm that the microstructure changes of laterite can result in the deterioration of macro physical and mechanical properties of laterite.
Research on the Affects of soil physical properties induced by the interaction between Fe/Al oxides and clay minerals[J].
To discover the deterioration mechanism of laterite dam induced by chloride ions in acidic water, it is necessary to discuss their properties and reaction products’ chemical and physical properties, because the properties are important factors for microstructure and engineering indices of laterite.
From the physical effect of the products, generating of CO2 gas in the double decomposition reactions that carbonates participate in is also an important factor for the deconstruction of laterite aggregates and the formation of capillary leakage channels.
The results confirm that the microstructure changes of laterite can result in the deterioration of macro physical and mechanical properties of laterite.
Research on the Affects of soil physical properties induced by the interaction between Fe/Al oxides and clay minerals[J].
Online since: October 2020
Authors: Maurício Marlon Mazur, Milton Sergio Fernandes Lima, Viviane Teleginski Mazur, Sílvia Rosa Nascimento, Marilei de Fátima Oliveira, Willer Cézar Braz, Correard Gilson Carlos de Castro
Optical microscopy showed the formation of a grain size refined morphology in the heat affected zone and fusion zone.
The formation of characteristic regions of a metal laser welding cross section micrograph was observed, i.e., the fusion zone (FZ), heat affected zone (HAZ) and the unaffected base material (BM).
Optical microscopy micrographs for laser welded samples (a) P1 with magnifications of fusion zone (b), heat affected zone (c) and base material (d); (e) P2 and (f) P3.
It is well known that reduction of grain size is beneficial to mechanical properties of welded materials.
Conclusions The variation of the scanning speed on the laser welding process is the main factor that alters the corrosion behavior.
The formation of characteristic regions of a metal laser welding cross section micrograph was observed, i.e., the fusion zone (FZ), heat affected zone (HAZ) and the unaffected base material (BM).
Optical microscopy micrographs for laser welded samples (a) P1 with magnifications of fusion zone (b), heat affected zone (c) and base material (d); (e) P2 and (f) P3.
It is well known that reduction of grain size is beneficial to mechanical properties of welded materials.
Conclusions The variation of the scanning speed on the laser welding process is the main factor that alters the corrosion behavior.
Online since: December 2018
Authors: Osamu Umezawa, Wei Bo Li
A Subsurface Fatigue Crack Generation Model in Near Alpha Titanium at Low Temperature
Osamu Umezawa1,a* and Weibo Li2,b
1Faculty of Engineering, Yokohama National University, Yokohama, 240-8501, Japan
2Graduate School of Engineering, Yokohama National University, Yokohama, 240-8501, Japan
aumezawa@ynu.ac.jp, bli-weibo-wv@ynu.jp
Keywords: High-cycle fatigue, Microcrack, Strain incompatibility, Taylor factor, Critical resolved shear stress, Titanium, Microtexture.
That is why not only the microstructure but also texture strongly affect the subsurface fatigue crack initiation.
The microcrack on basal plane required a combination of a high Schmid factor in addition to high elastic stiffness, including a high tensile stress normal to the basal plane.[7] The shear stress on {1010} assists the microcrack growth to form a (0001) facet and coalescence of facets on (0001) and {1010} by slip-off.
Then an approximated equation to give the maximum stress intensity factor range, ΔKImax, at the crack tip is represented as follows: ΔKImax=A∙Δσmaxπarea. (1) where Dsmax is maximum cyclic stress range, A is 0.5 as the coefficient of subsurface crack, and area is the square root of subsurface crack area as the microcrack length.
Nagai, Critical experiments and analyses at cryogenice temperature to promote a bettwer understanding of mechanical properties in high-strength alloys, in: U.
That is why not only the microstructure but also texture strongly affect the subsurface fatigue crack initiation.
The microcrack on basal plane required a combination of a high Schmid factor in addition to high elastic stiffness, including a high tensile stress normal to the basal plane.[7] The shear stress on {1010} assists the microcrack growth to form a (0001) facet and coalescence of facets on (0001) and {1010} by slip-off.
Then an approximated equation to give the maximum stress intensity factor range, ΔKImax, at the crack tip is represented as follows: ΔKImax=A∙Δσmaxπarea. (1) where Dsmax is maximum cyclic stress range, A is 0.5 as the coefficient of subsurface crack, and area is the square root of subsurface crack area as the microcrack length.
Nagai, Critical experiments and analyses at cryogenice temperature to promote a bettwer understanding of mechanical properties in high-strength alloys, in: U.