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Online since: February 2018
Authors: Melina Bosco, Pier Paolo Rossi, Edoardo Michele Marino, Francesca Barbagallo, Aurelio Ghersi
As far as the authors know, no expression for calculation of the equivalent viscous damping factor ξhys of EBFs is reported in literature.
To investigate the influence of the dynamic properties of the system on the equivalent viscous damping ratio ξhys, different values have been assigned to the period of vibration T of the system, in the range of 0.25 s and 1.50 s.
The mechanical length of the link varies along the height of the building and is equal to 2.0 at the top story and 0.77 at the base of the building.
The viscous dampers are modelled by the uniaxial material “Viscous”; the power factor is set equal to 1.0.
However, in case of tall structures, also the effects of the third mode of vibration could affect the seismic response and, thus, they should be taken into account.
To investigate the influence of the dynamic properties of the system on the equivalent viscous damping ratio ξhys, different values have been assigned to the period of vibration T of the system, in the range of 0.25 s and 1.50 s.
The mechanical length of the link varies along the height of the building and is equal to 2.0 at the top story and 0.77 at the base of the building.
The viscous dampers are modelled by the uniaxial material “Viscous”; the power factor is set equal to 1.0.
However, in case of tall structures, also the effects of the third mode of vibration could affect the seismic response and, thus, they should be taken into account.
Online since: March 2015
Authors: Cheng Lin Shi, Han Bing Liu
Based on my existing research results, every factor chooses two sub-factors.
Based on multifactorial factors, I did some orthogonal tests, and every performance index of water-proof adhesive layer needs testing 8 times.
(2)When the rubber bitumen waterproof adhesive layer is with 4.75-9.5mmgravel particle, it has better shear resistance and bonding properties.
(3)When SBS modified bitumen waterproof adhesive layer is with 9.5-13.2mmgravel particle, it has better shear resistance and bonding properties.
Mechanical properties of waterproof adhesive layer on concrete box girder bridge[J].
Based on multifactorial factors, I did some orthogonal tests, and every performance index of water-proof adhesive layer needs testing 8 times.
(2)When the rubber bitumen waterproof adhesive layer is with 4.75-9.5mmgravel particle, it has better shear resistance and bonding properties.
(3)When SBS modified bitumen waterproof adhesive layer is with 9.5-13.2mmgravel particle, it has better shear resistance and bonding properties.
Mechanical properties of waterproof adhesive layer on concrete box girder bridge[J].
Online since: July 2024
Authors: Krisztian Horvath, Ambrus Zelei
- Modal properties of the gearbox housing, including deformation, operating conditions, speed, and load, also contribute to radiated noise.
2.
The FEM approach allows us to grasp the complex interaction of the various factors involved in gear noise generation [6].
- Gearbox Housing Design and Material Use: Innovative Gearbox Housing Materials [20]: Exploring materials with better acoustic damping properties to reduce noise transmission from the gearbox.
Ancillary Factors Influencing Noise Levels.
Thus, it ignores other factors such as transmission paths.
The FEM approach allows us to grasp the complex interaction of the various factors involved in gear noise generation [6].
- Gearbox Housing Design and Material Use: Innovative Gearbox Housing Materials [20]: Exploring materials with better acoustic damping properties to reduce noise transmission from the gearbox.
Ancillary Factors Influencing Noise Levels.
Thus, it ignores other factors such as transmission paths.
Online since: July 2011
Authors: Mark Easton, John F. Grandfield, C. J. Davidson, M.A. Rhamdhani, M. A. Dewan, Jason B. Mitchell, G. A. Brooks
Impurity control is also of concern in recycling due to the pickup of elements such as Fe from contaminants in the scrap, which can detrimentally affect the alloy properties.
Mg improves the mechanical properties without impairing the corrosion-resistance [16].
Fe rich phases in Al act as stress raisers and points of weak coherence, leading to a reduction in the mechanical properties, especially ductility of Al alloys [13-14, 18].
Doty, Factors Controlling the Type & Morphology of Cu-Containing Phases in 319 Al Alloy.
Aluminium Alloys: Their Physical & Mechanical Properties, Pts 1-3, 1996. 217: p. 141-6 [33] Luan, B., X.
Mg improves the mechanical properties without impairing the corrosion-resistance [16].
Fe rich phases in Al act as stress raisers and points of weak coherence, leading to a reduction in the mechanical properties, especially ductility of Al alloys [13-14, 18].
Doty, Factors Controlling the Type & Morphology of Cu-Containing Phases in 319 Al Alloy.
Aluminium Alloys: Their Physical & Mechanical Properties, Pts 1-3, 1996. 217: p. 141-6 [33] Luan, B., X.
Online since: May 2020
Authors: V.E. Arkhipov, M.S. Pugachev
The proposed method is based on the technique used in Japan to evaluate the mechanical properties of coatings applied by gas-thermal deposition methods (Japanese industrial standard N8663-1961) [18].
Further study of the mechanical properties of coatings applied by gas-dynamic deposition using a mechanical mixture of copper and zinc particles showed that this technique is very sensitive to the processes occurring in the applied metal layer and resulting in change in the phase composition.
Method of “ring separation” allows investigating the influence of technological factors of coating application and structural and phase transformations in the applied metal layer on cohesion.
Pugachev, Gazodinamicheskoe napylenie: struktura i svojstva pokrytij [Gas-dynamic coating: structure and properties of coatings], 2017, p. 240.
Efremov, Latuni ot fazovogo stroeniya k strukture i svojstvam [BRASSES from phase structure to structure and properties], 2016, p. 314.
Further study of the mechanical properties of coatings applied by gas-dynamic deposition using a mechanical mixture of copper and zinc particles showed that this technique is very sensitive to the processes occurring in the applied metal layer and resulting in change in the phase composition.
Method of “ring separation” allows investigating the influence of technological factors of coating application and structural and phase transformations in the applied metal layer on cohesion.
Pugachev, Gazodinamicheskoe napylenie: struktura i svojstva pokrytij [Gas-dynamic coating: structure and properties of coatings], 2017, p. 240.
Efremov, Latuni ot fazovogo stroeniya k strukture i svojstvam [BRASSES from phase structure to structure and properties], 2016, p. 314.
Online since: January 2012
Authors: Frank Montheillet, David Piot, Gilles Damamme
Each grain is then considered in turn as an inclusion, embedded in a homogeneous equivalent matrix, the properties of which are obtained by averaging over all the grains.
Introduction During the thermomechanical processing of superalloys, dynamic recrystallization controls microstructure evolution and thus important aspects of the mechanical behavior in service.
Description of Grain Properties When deterministic evolution equations (i.e., with no stochastic terms) are used, all grains of the same age have undergone identical evolution and therefore have the same diameterand dislocation densityHence, all properties of the grains in the model are one-parameter distributions, and each grain is characterized by its age.
In [5], the effect of the distribution of the strain hardening parameter (related to Taylor factor) was studied.
For distributed properties, such as grain-size distribution, the model fails with fixed parameters but it can be successful if some model parameters (e.g. grain boundary mobility) are also reasonably distributed in comparison to neighborhood effects in the aggregate.
Introduction During the thermomechanical processing of superalloys, dynamic recrystallization controls microstructure evolution and thus important aspects of the mechanical behavior in service.
Description of Grain Properties When deterministic evolution equations (i.e., with no stochastic terms) are used, all grains of the same age have undergone identical evolution and therefore have the same diameterand dislocation densityHence, all properties of the grains in the model are one-parameter distributions, and each grain is characterized by its age.
In [5], the effect of the distribution of the strain hardening parameter (related to Taylor factor) was studied.
For distributed properties, such as grain-size distribution, the model fails with fixed parameters but it can be successful if some model parameters (e.g. grain boundary mobility) are also reasonably distributed in comparison to neighborhood effects in the aggregate.
Online since: October 2023
Authors: Marcello Fera, Piera Maresca, Pasquale Manco, Alessandro Greco, Salvatore Gerbino
Specifically, it was demonstrated that build direction can affect various aspects of process performance such as production time, costs and product quality and functional properties [2].
Furthermore, surface quality, as well as mechanical properties, are process parameter-dependent.
Control factors and corresponding levels.
Whereas no factors are statistically significant for T.
Kok et al., Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review, Mater.
Furthermore, surface quality, as well as mechanical properties, are process parameter-dependent.
Control factors and corresponding levels.
Whereas no factors are statistically significant for T.
Kok et al., Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review, Mater.
Online since: November 2017
Authors: Feng Li, Zhang Gang, Feng Guo, Guangyuan Liu
Design and Experiment Study on a New Type of Lubrication Simulation System for Thrust-Ball Bearing in Confined Space
Feng Li1,2,a*, Feng Guo2,b, Guangyuan Liu2,c and Zhang Gang1,d
1College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China
2College of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, China
alifnsd@163.com,lifnsd@qust.edu.cn, bmech_edu@126.com, cfrichard@163.com, dzhgqust@163.com
Keywords: Elastohydrodynamic, Confined gap, Film thickness, Bearing, Interference
Abstract.
Unconfined space is widely used in EHL formulas for to evaluate film thickness, which is related to operating conditions and material properties.
The predicted life of rolling bearings was examined by studying the effect of measured roughness variations on the adjustment factor.
Acknowledgements This research was supported by National Natural Science Foundation of China (No. 51605238), University Science and technology project of Shandong Province(J16LB07), Qingdao original innovation program basic research for application project(Study on tribology properties of novel artificial joint materials,17-1-1-92-jch), Special Fund for Postdoctoral Innovative Project of Shandong Province (No.201203029).
Evans, Factors Affecting Surface Roughness Measurement Results, and the Impact on Predicted Life of Elastohydrodynamic Lubricated Rolling-Element Bearings.
Unconfined space is widely used in EHL formulas for to evaluate film thickness, which is related to operating conditions and material properties.
The predicted life of rolling bearings was examined by studying the effect of measured roughness variations on the adjustment factor.
Acknowledgements This research was supported by National Natural Science Foundation of China (No. 51605238), University Science and technology project of Shandong Province(J16LB07), Qingdao original innovation program basic research for application project(Study on tribology properties of novel artificial joint materials,17-1-1-92-jch), Special Fund for Postdoctoral Innovative Project of Shandong Province (No.201203029).
Evans, Factors Affecting Surface Roughness Measurement Results, and the Impact on Predicted Life of Elastohydrodynamic Lubricated Rolling-Element Bearings.
Online since: January 2022
Authors: Muhammad Ahmad Bkkar, Roman Olegovich Olekhnovich, Mayya Valerievna Uspenskaya
Optoelectronic and electrical properties of the active layer of OSCs and PSCs.
Nonconductive materials are rarely applied by this method due to their insulating properties [75].
The addition method of the additive greatly influences the perovskite layer properties.
Zahidov, Memristive properties of solar cells based on perovskite and polymer Composite, J.
Brüggemann, Optical and mechanical properties of highly transparent glass-flake composites, J.
Nonconductive materials are rarely applied by this method due to their insulating properties [75].
The addition method of the additive greatly influences the perovskite layer properties.
Zahidov, Memristive properties of solar cells based on perovskite and polymer Composite, J.
Brüggemann, Optical and mechanical properties of highly transparent glass-flake composites, J.
Online since: October 2023
Authors: M. Faris Akmal Md. Azlin, R. Rajendran, Ahmad Baharuddin Abdullah, Ramdziah Md. Nasir, Shahir Y. Mohd Yusuf, Zuhailawati Hussain
In addition, there are other factors such as load, test duration, temperature, and humidity that affect wear mechanisms and wear resistance [6, 7].
Table 1: Aluminium ER 5356 material properties.
Table 5: The properties of 5W-40 synthetic engine oil Properties Total Base Number (TBN) 11.28 mg KOH/g Flash point 217 ◦C Viscosity @100 ◦C 14.2 Viscosity @40 ◦C 84 Viscosity Index 175 3.
Bambach, “A Study on The Mechanical Properties Of Hybrid Parts Manufactured By Forging And Wire Arc Additive Manufacturing,” Procedia Manuf., vol. 47,2020, pp. 1141–1148
Chandra, “Mechanical properties of wire and arc additive manufactured component deposited by a CNC controlled GMAW,” Mater.
Table 1: Aluminium ER 5356 material properties.
Table 5: The properties of 5W-40 synthetic engine oil Properties Total Base Number (TBN) 11.28 mg KOH/g Flash point 217 ◦C Viscosity @100 ◦C 14.2 Viscosity @40 ◦C 84 Viscosity Index 175 3.
Bambach, “A Study on The Mechanical Properties Of Hybrid Parts Manufactured By Forging And Wire Arc Additive Manufacturing,” Procedia Manuf., vol. 47,2020, pp. 1141–1148
Chandra, “Mechanical properties of wire and arc additive manufactured component deposited by a CNC controlled GMAW,” Mater.