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Online since: July 2011
Authors: Qian Ming Yang, Re Feng So, Xiao Ming Wang
Finite Element Analysis of Hydro-Viscous Drive Main Transmission
Shaft Using ANSYS
Re-feng So1,a, Qian-ming Yang2,b and Xiao-ming Wang2,c
1Department of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Taian, China
2College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, China
aSrf7788@163.com, byqm8396@sdust.edu.cn, cwxm0615@163.com
Keywords: Hydro-Viscous Drive; main drive shaft; finite element analysis; ANSYS; stress and stain
Abstract: The main drive shaft is one of the key component of the Hydro-Viscous Drive device.
Another character of Hydro-Viscous Drive based on transmission theory of viscous liquid is, when the active and passive friction disk makes the rotary motion under the Newtonian fluid shear friction force, also affected by load cylinder of the role of axial thrust.
All these mention above show that taking the initiative for the effective analysis of the mechanical axis of the shaft designed are be necessary for guaranteeing a reasonable structure as the driving shaft itself mechanics and the functional requirements of the hydraulic power transmission and the structural design more complex.
Selects third theory of strength [2] to carry on the intensity examination: where:—Axis computation stress (MPa); — Referring factor; —Reverse shear stress (MPa); —Axis anti-curved section coefficient (mm3) According to the metal material of the axis, the admissible bending stress of 40Cr is MPa, while , the driveshaft is safe.
Taking into account the complexity of the driving shaft , precision and computer resources as well as other factors, chooses 8 nodes solid45 tetrahedron unit model during Analysis process, uses 3 levels of precisions the SmartSize intelligence grid divisions, produces 138138 units finally, 28758 node grids, As shown in Figure 5.
Another character of Hydro-Viscous Drive based on transmission theory of viscous liquid is, when the active and passive friction disk makes the rotary motion under the Newtonian fluid shear friction force, also affected by load cylinder of the role of axial thrust.
All these mention above show that taking the initiative for the effective analysis of the mechanical axis of the shaft designed are be necessary for guaranteeing a reasonable structure as the driving shaft itself mechanics and the functional requirements of the hydraulic power transmission and the structural design more complex.
Selects third theory of strength [2] to carry on the intensity examination: where:—Axis computation stress (MPa); — Referring factor; —Reverse shear stress (MPa); —Axis anti-curved section coefficient (mm3) According to the metal material of the axis, the admissible bending stress of 40Cr is MPa, while , the driveshaft is safe.
Taking into account the complexity of the driving shaft , precision and computer resources as well as other factors, chooses 8 nodes solid45 tetrahedron unit model during Analysis process, uses 3 levels of precisions the SmartSize intelligence grid divisions, produces 138138 units finally, 28758 node grids, As shown in Figure 5.
Online since: August 2010
Authors: Bong Ki Ryu, Sang Hyeok Im, Nam Jin Kim, Dong Hwan Kim, Jae Young Kweon, Dong Keon Koo, Tae Hee Kim, Seong Hyeon Heo, Duck Ki Yoon
Specifically, the glass powders based on Li2O-Al2O3-SiO2 (LAS) has been well-developed due to
their great mechanical strength, thermal stability, and economical merits4-5)
.
According to Frenkel equation7) , the main factors that contribute to densification by viscous flow are particle size, surface energy of particle and viscosity depending on the temperature: 3 0 ) )(8 3 1()( rT t t g (1) where ρ0 is initial density, ρg is glass density, γ is the surface energy of the glass particle, and η(T) is the viscosity at the temperature.
Therefore, the primary factor for the glass powder sintering is the viscosity which has severe decrement as the temperature increases.
Results and Discussion Glass properties.
For the heating rate of 10℃/min, the optimum sintering condition was 650℃ without crystal growth of β-spodumene which could affect densification, although nucleation or nano-crystal growth was occurred.
According to Frenkel equation7) , the main factors that contribute to densification by viscous flow are particle size, surface energy of particle and viscosity depending on the temperature: 3 0 ) )(8 3 1()( rT t t g (1) where ρ0 is initial density, ρg is glass density, γ is the surface energy of the glass particle, and η(T) is the viscosity at the temperature.
Therefore, the primary factor for the glass powder sintering is the viscosity which has severe decrement as the temperature increases.
Results and Discussion Glass properties.
For the heating rate of 10℃/min, the optimum sintering condition was 650℃ without crystal growth of β-spodumene which could affect densification, although nucleation or nano-crystal growth was occurred.
Online since: February 2007
Authors: Antal Huba, László Valenta, István Muka
New perspectives have opened for the manufacturing of products in precision engineering and in
medical instrumentation not only by the special mechanical, optical, biochemical etc. properties
but also the electrical ones of carbon black dotted silicone rubber.
This modulus is defined as 22 EEE ''+'=∗ further we obtain the material loss factor with EE '''=δtan .
The electric properties of the carbon dotted polymers are determined by the type, amount and the size of particles [6].
However the percentage of carbon strongly influences the mechanical properties of the material.
This pulling force can be affected by the pressure.
This modulus is defined as 22 EEE ''+'=∗ further we obtain the material loss factor with EE '''=δtan .
The electric properties of the carbon dotted polymers are determined by the type, amount and the size of particles [6].
However the percentage of carbon strongly influences the mechanical properties of the material.
This pulling force can be affected by the pressure.
Online since: November 2014
Authors: Shuai Zhang, Li Bao Wang, Ping Huai Mao, Yi Lin Mao
Analysis of lightweight extension support coal mine car loader
Pinghuai Maoa,1, Shuai Zhanga, b, 2, LibaoWangb,3 , Yilin Maoc,4
aSchool of Mechanical Engineering, Anhui University of Science and Technology, Huainan, China
b Product Quality Supervision and Inspection in Huainan of Anhui province
c The Internet of Things Institute, CASC
1maopinghuai@sohu.com, 2236316257@qq.com, 3843870367@qq.com,4lijingxi_sd@126.com
Keywords: loader, support vehicles, lightweight design, finite element analysis
Abstract.
The material properties are as follows: density: 1.15x103kg/m3, Poisson's ratio: 0.4, elastic modulus: 32Gpa.
The finite element analysis Necessary to simplify the model: (1) ignore all chamfer, (2) neglecting small hole effect on the analysis results, such as screw hole and a steel wire rope hole, (3) to remove the rope winding machine, does not affect the performance of a rack parts, (4) ignore the influence of casting structure, the simplified modeling [2].
Through calculation, the frame under surface load size is 2118N, considering the security properties of supporting car, take a safety factor of 1.2, each supporting vehicle frame force 2541.6N.
The material properties are as follows: density: 1.15x103kg/m3, Poisson's ratio: 0.4, elastic modulus: 32Gpa.
The finite element analysis Necessary to simplify the model: (1) ignore all chamfer, (2) neglecting small hole effect on the analysis results, such as screw hole and a steel wire rope hole, (3) to remove the rope winding machine, does not affect the performance of a rack parts, (4) ignore the influence of casting structure, the simplified modeling [2].
Through calculation, the frame under surface load size is 2118N, considering the security properties of supporting car, take a safety factor of 1.2, each supporting vehicle frame force 2541.6N.
Online since: September 2020
Authors: Viboon Saetang, Wisan Charee
A major problem of laser machining processes is thermal damage, which significantly alters the machined surface and subsurface properties of workpiece.
Furthermore, the rapid cooling of laser-ablated surface usually causes residual stress and cracks, and these adversely affect the strength, fatigue life and dimensions of part manufactured.
The good thermal conductivity of water and high mechanical shock pressure induced in the confined volume of water are anticipated to play the significant roles in cooling of workpiece and expelling of cut debris during the ablation.
Bhattacharyya, Pulsed Nd:YAG Laser Micro-turning of Alumina to Study the Effect of Overlap Factors on Surface Roughness Performance, IOP Conference Series: Materials Science and Engineering. 377 (2018) 1-7
Dumkum, Laser micro-milling under a thin and flowing water layer: A new concept of liquid-assisted laser machining process, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 230 (2015) 376-380.
Furthermore, the rapid cooling of laser-ablated surface usually causes residual stress and cracks, and these adversely affect the strength, fatigue life and dimensions of part manufactured.
The good thermal conductivity of water and high mechanical shock pressure induced in the confined volume of water are anticipated to play the significant roles in cooling of workpiece and expelling of cut debris during the ablation.
Bhattacharyya, Pulsed Nd:YAG Laser Micro-turning of Alumina to Study the Effect of Overlap Factors on Surface Roughness Performance, IOP Conference Series: Materials Science and Engineering. 377 (2018) 1-7
Dumkum, Laser micro-milling under a thin and flowing water layer: A new concept of liquid-assisted laser machining process, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 230 (2015) 376-380.
Online since: July 2014
Authors: Ying Guo, Wei Dong Liu, Xiao Bin Nie, Qing Xiang Lou, Ling Hui Sun, Ji Ye Li
Introduction
During the course of polymer flooding in porous media, polymer solution would be diluted by formation water, and it was stranded due to surface adsorption, mechanical capture, hydrodynamic trap and the interactions between polymer molecules[1].
For the polymer on surface of core particles, adsorption amount are affected by many factors, which are the types of polymer, molecular weight, degree of hydrolysis, salinity, rock composition, surface properties of particles, environmental temperature and so on.
Dynamic retention When polymer flows in porous media of reservoir, hydrodynamic trapping and mechanical capture would occur on the rock surface due to its pore structure and permeability heterogeneity[7].
It is generally considered that four mechanisms have caused the polymer retention, and they are surface absorption, mechanical capture, capture of fluid dynamics and interactions between polymer molecules[8].
For the polymer on surface of core particles, adsorption amount are affected by many factors, which are the types of polymer, molecular weight, degree of hydrolysis, salinity, rock composition, surface properties of particles, environmental temperature and so on.
Dynamic retention When polymer flows in porous media of reservoir, hydrodynamic trapping and mechanical capture would occur on the rock surface due to its pore structure and permeability heterogeneity[7].
It is generally considered that four mechanisms have caused the polymer retention, and they are surface absorption, mechanical capture, capture of fluid dynamics and interactions between polymer molecules[8].
Online since: October 2011
Authors: Xue Bin Li, Zheng Xing Ma, Guo Lei Liu, Ming Cheng Chen, Quan Mei Zhu
In this paper, combined with geological conditions and rock mechanical properties of coal bed washout in east auxiliary roadway of Pingshuo Mine No.3, proposed support program of STCC supports through STCC short column experiments and theoretical analysis, by numerical analysis and on-site observations analyzed the stability of the roadway supported by STCC supports, provided a theoretical basis and technical support for the roadway in coal bed washout.
Fig.4 Parameters of STCC supports + bolt-mesh supporting Numerical Simulation on the Stability of East Auxiliary Roadway Surrounding Rock Mechanical Model of Roadway Surrounding Rock.
Top mechanical boundary conditions on the model was vertical load P =5.74MPa, limited horizontal movement on the model side and vertical movement on the model bottom.
Shown in figure 7, the stress concentration zones were formed at floor and its angle, the maximum of stress concentration was 13.4MPa at middle of floor, and the stress concentration factor was 2.33.
Stress concentration zone was formed in the deep zone of roadway floor and it's angle, the maximum of stress concentration was 13.4MPa, and the stress concentration factor was 2.33.
Fig.4 Parameters of STCC supports + bolt-mesh supporting Numerical Simulation on the Stability of East Auxiliary Roadway Surrounding Rock Mechanical Model of Roadway Surrounding Rock.
Top mechanical boundary conditions on the model was vertical load P =5.74MPa, limited horizontal movement on the model side and vertical movement on the model bottom.
Shown in figure 7, the stress concentration zones were formed at floor and its angle, the maximum of stress concentration was 13.4MPa at middle of floor, and the stress concentration factor was 2.33.
Stress concentration zone was formed in the deep zone of roadway floor and it's angle, the maximum of stress concentration was 13.4MPa, and the stress concentration factor was 2.33.
Online since: June 2011
Authors: Xiu Ju Wang, Li Guo Wang, Si Quan Liu, Shi Qi Guo, Xiao Guang Zhang, Ai Min Wang
If advantages of polymer materials, such as chemical stability, heat resistance, corrosion-resistant bacteria and mechanical strength be maintained, also need to overcome its disadvantages such as hydrophobic, membrane fouling, it is necessary to change the membrane hydrophilicity [5, 6].
Enhancing the hydrophilic of membrane will make permeable quantitative large, but high hydrophilic membrane will not only easy to dissolve, but also losing mechanical strength.
PAA is a hydrophilic polymer, and also a good membrane material with large charge density, and molecular weight, as well as prepared membranes with good mechanical properties through the cross-linked carboxyl.
PAA was blended with PVDF to modify PVDF membrane for the first time, the factors that affected the performance of PVDF membrane were investigated, and then the technical parameters were made certain, hydrophilic PVDF flat ultrafiltration membranes were prepared successfully.
Enhancing the hydrophilic of membrane will make permeable quantitative large, but high hydrophilic membrane will not only easy to dissolve, but also losing mechanical strength.
PAA is a hydrophilic polymer, and also a good membrane material with large charge density, and molecular weight, as well as prepared membranes with good mechanical properties through the cross-linked carboxyl.
PAA was blended with PVDF to modify PVDF membrane for the first time, the factors that affected the performance of PVDF membrane were investigated, and then the technical parameters were made certain, hydrophilic PVDF flat ultrafiltration membranes were prepared successfully.
Online since: October 2014
Authors: Steven James Lötter, Walter Purcell, Johann T. Nel
These alloys are used in the nuclear industry as fuel cladding due to their resistance to corrosion [3] at operating temperatures, good mechanical strength and relatively low thermal neutron capture cross-section (0.184 barns) [4].
These contaminants may also adversely affect the desirable chemical, mechanical and thermal properties of the metal as well.
These factors present a challenge when the sample is a non-conducting powder, such as zirconia (ZrO2).
These samples were run on the GD-OES to determine what the boundaries were for maintaining conductivity and mechanical strength.
These contaminants may also adversely affect the desirable chemical, mechanical and thermal properties of the metal as well.
These factors present a challenge when the sample is a non-conducting powder, such as zirconia (ZrO2).
These samples were run on the GD-OES to determine what the boundaries were for maintaining conductivity and mechanical strength.
Online since: November 2013
Authors: C.H. Voon, U. Hashim, Mohd Nazree B. Derman, Tijjani Adam, K.L. Foo
It was found that the increasing anodizing voltage affect the morphology and dimensional parameters of porous AAO.
The regularity of porous AAO was affected by anodizing voltage.
Since the properties of nanostructured materials are significantly influenced by the dimensions, it is important to synthesis nanostructured materials of uniform dimensions [3, 9, 10].
Conclusions In conclusions, the anodizing voltage has significant effect on the morphology, dimensional properties and growth kinetics of the porous AAO.
Asoh, Controlling factor of self-ordering of anodic porous alumina, J.
The regularity of porous AAO was affected by anodizing voltage.
Since the properties of nanostructured materials are significantly influenced by the dimensions, it is important to synthesis nanostructured materials of uniform dimensions [3, 9, 10].
Conclusions In conclusions, the anodizing voltage has significant effect on the morphology, dimensional properties and growth kinetics of the porous AAO.
Asoh, Controlling factor of self-ordering of anodic porous alumina, J.