Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: August 2011
Authors: Shang Yu Huang, Jian Hua Hu, Fu Yang Gao, Chang Peng Song, Fei Feng
Magnetic pulse connection fixtures are simple, no mechanical contact, no damage to the surface of element.
This phenomenon can reduce the joint of the bonding strength and affect the surface roughness of the joint.
The analysis of experimental results The grooves to impact of the connection properties.
Rod forms (a)—double groove (b)—no groove (c)—thread groove (d)—one groove Groove shape and quantity is one of the most important factors, which improve pipe and rod connection strength.
The best connection gap value is affected by the material properties, structure, size, discharge energy, and many other factors.
This phenomenon can reduce the joint of the bonding strength and affect the surface roughness of the joint.
The analysis of experimental results The grooves to impact of the connection properties.
Rod forms (a)—double groove (b)—no groove (c)—thread groove (d)—one groove Groove shape and quantity is one of the most important factors, which improve pipe and rod connection strength.
The best connection gap value is affected by the material properties, structure, size, discharge energy, and many other factors.
Online since: April 2012
Authors: Yi Du Zhang, Qiong Wu, Xiang Sheng Gao, Lin Fang
State Key Laboratory of Virtual Reality Technology and Systems, School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
2.
Tool deflection is one of the important influencing factors for surface roughness and surface integrity of work piece in cutting process.
The main factors are the tool geometry, the cutting condition and the work piece properties.
Tool deflection can affect the acceptable dimension accuracy of finishing.
The isotropic material properties are input according to different cutter material.
Tool deflection is one of the important influencing factors for surface roughness and surface integrity of work piece in cutting process.
The main factors are the tool geometry, the cutting condition and the work piece properties.
Tool deflection can affect the acceptable dimension accuracy of finishing.
The isotropic material properties are input according to different cutter material.
Online since: January 2013
Authors: Jing Hong Du, Ping Zhou
Molecular structure of NMAM contains both unsaturated vinyl with the polymerization properties and the hydroxymethyl group.
The preparation and reaction conditions of slurry should be considered comprehensively in order to obtain the green bodies with better properties.
We should reduce the monomer dosage as much as possible in case of no affecting products’ properties, which was helpful to reduce organic materials of slurry and shorten binder burn-out time.
High strength can make ceramic green body keep good mechanical properties and also reduce waste products greatly caused by lower strength of green body in mechanical process.
Through discussing main influence factors about polymerization of NMAM monomer, the suitable conditions for PMN-PZT piezoelectric ceramic by gelcasting can be obtained: monomer concentration was 10~15wt%, initiator and catalyst content were respectively 0.4~0.5vol% and 0.4vol%, pH value of slurry was about 10.
The preparation and reaction conditions of slurry should be considered comprehensively in order to obtain the green bodies with better properties.
We should reduce the monomer dosage as much as possible in case of no affecting products’ properties, which was helpful to reduce organic materials of slurry and shorten binder burn-out time.
High strength can make ceramic green body keep good mechanical properties and also reduce waste products greatly caused by lower strength of green body in mechanical process.
Through discussing main influence factors about polymerization of NMAM monomer, the suitable conditions for PMN-PZT piezoelectric ceramic by gelcasting can be obtained: monomer concentration was 10~15wt%, initiator and catalyst content were respectively 0.4~0.5vol% and 0.4vol%, pH value of slurry was about 10.
Online since: January 2013
Authors: Jin Li Zhang, Man Yuan, Zheng Guo Jiang, Qing Yang
To improve the mechanical property of LC, this present paper conducts LC reinforced with the polypropylene fibers (PF) and studies some properties through tests.
The physical and mechanical properties of RC and PF are given in Table 1~2.
The fibers change the mechanical properties of LC.
These three factors are considered when the critical strain is determined.
It shows that the stress-strain relationship of hyperbola-straight lines presents in this paper can reflect the mechanical property of FRLC preferably.
The physical and mechanical properties of RC and PF are given in Table 1~2.
The fibers change the mechanical properties of LC.
These three factors are considered when the critical strain is determined.
It shows that the stress-strain relationship of hyperbola-straight lines presents in this paper can reflect the mechanical property of FRLC preferably.
Online since: April 2014
Authors: Thanakorn Wasanapiarnpong, Suda Wanakitti, Charusporn Mongkolkachit, Thanakorn Tepamat
Ion exchange properties of zeolite NaA is interesting for water treatment [5].
Therefore, it can be concluded that the synthesis of zeolite NaA affected by temperature and time.
This selected composition was taken to mechanical strength test and the bending strength of 0.68 MPa was obtained.
Subotić, Chemically controlled particulate properties of zeolites: Towards the face-less particles of zeolite A. 2.
Gad, A study of the factors affecting the removal of humic acid by activated carbon prepared from biomass material.
Therefore, it can be concluded that the synthesis of zeolite NaA affected by temperature and time.
This selected composition was taken to mechanical strength test and the bending strength of 0.68 MPa was obtained.
Subotić, Chemically controlled particulate properties of zeolites: Towards the face-less particles of zeolite A. 2.
Gad, A study of the factors affecting the removal of humic acid by activated carbon prepared from biomass material.
Online since: October 2013
Authors: Lie Zhun Wang, Zi Qing Liu
In the technical indexes of the motor, motor steady state temperature is an important factor to influence the service life of the motor and the operation reliability, properly handle the relationship between motor steady state temperature rise and other properties, is the key to the success or failure of the development.
The product of the project is based on long-term, comprehensive analysis of factors from the performance and influence, through testing to achieve optimal design.
Cold rolled steel sheet for punching and shearing stress sensitive, theoretically, punching after annealing treatment, can eliminate stress, restore good properties of cold rolled silicon steel sheet.
There are many factors are involved in the choice of groove, groove is beneficial to reduce some additional loss, but the noise of the motor may be affected, the project products combined with the calculation of electromagnetic noise of motor and the additional loss of the system analysis, and combined with the original product successful slot, has conducted the system research, part of the product has been adjusted, which makes it more reasonable[5,6].
Beijing: Mechanical Industry Press, 2008 [3] Li Zhiqiang.
The product of the project is based on long-term, comprehensive analysis of factors from the performance and influence, through testing to achieve optimal design.
Cold rolled steel sheet for punching and shearing stress sensitive, theoretically, punching after annealing treatment, can eliminate stress, restore good properties of cold rolled silicon steel sheet.
There are many factors are involved in the choice of groove, groove is beneficial to reduce some additional loss, but the noise of the motor may be affected, the project products combined with the calculation of electromagnetic noise of motor and the additional loss of the system analysis, and combined with the original product successful slot, has conducted the system research, part of the product has been adjusted, which makes it more reasonable[5,6].
Beijing: Mechanical Industry Press, 2008 [3] Li Zhiqiang.
Online since: July 2011
Authors: Yong Xia, Xiao Qing Zhou
The shape and the percentage of the coarse aggregate are the key factors in the mesoscale numerical simulation.
Introduction Numerical simulation is a typical method in analyzing the mechanical behavior of concrete.
In general numerical simulation, concrete is usually assumed to be a homogeneous material with homogenized material properties derived from standard concrete specimen tests.
From these figures, it can be found that the crack pattern is affected by the coarse aggregate size and position.
From the numerical simulation, it can be found that the aggregate shape does affect the concrete crack patterns.
Introduction Numerical simulation is a typical method in analyzing the mechanical behavior of concrete.
In general numerical simulation, concrete is usually assumed to be a homogeneous material with homogenized material properties derived from standard concrete specimen tests.
From these figures, it can be found that the crack pattern is affected by the coarse aggregate size and position.
From the numerical simulation, it can be found that the aggregate shape does affect the concrete crack patterns.
Online since: September 2011
Authors: Bin Chao Lou
And the calculated value and vibration signal spectrum diagram compares analysis, find out the fault location and machine determine the fault properties.
So once found that the products processing machine precision (size accuracy and geometrical accuracy) or surface roughness in short of asks, eliminates human factors, mainly from after the operation status of machine itself to find reasons.
We decided to adopt the mechanical fault diagnosis technology to find fault location and machine tools [2], we determine the fault properties of the first use of machines and machine investigation.
Using JGZY - 1 mechanical fault diagnostic instrument, test system shown in figure 2.
Figure 5 for lathe 560 R.P.M. sensors to walk the knife box signal spectrum diagram, vibration filter the biggest frequency signal for 313.75 Hz, but also corresponding to verify it affected for processing gear.
So once found that the products processing machine precision (size accuracy and geometrical accuracy) or surface roughness in short of asks, eliminates human factors, mainly from after the operation status of machine itself to find reasons.
We decided to adopt the mechanical fault diagnosis technology to find fault location and machine tools [2], we determine the fault properties of the first use of machines and machine investigation.
Using JGZY - 1 mechanical fault diagnostic instrument, test system shown in figure 2.
Figure 5 for lathe 560 R.P.M. sensors to walk the knife box signal spectrum diagram, vibration filter the biggest frequency signal for 313.75 Hz, but also corresponding to verify it affected for processing gear.
Online since: December 2014
Authors: Gang Wei, Hao Qiang Yu
Study on Effect of Frame Structures Crossed by Shallow-buried and Mining Tunnelling
Wei Gang*, Yu Haoqiang
Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China
weig@zucc.edu.cn (*Corresponding author)
Key words: shallow-buried tunnels; structure; independent foundation; finite element method
Abstract: During the shallow-buried tunnel excavation, the formation will be affected and the nearby buildings will be caused fracture.
With the increasing story of the framework, the settlement of building is nearly not affected, and P1 and E1 decrease slightly.
The loadings and deformations of buildings before and after the excavation of tunnel face is studied, and the influences result from the change of horizontal position of tunnels and buildings, the height of building and the soil property are analyzed.
The simulation are followed as: (1) to activate the soil, and initiate the self-weight load and reset displacement; (2) to modify the properties of basic elements and activate the structure elements; then apply the building load and reset displacement; (3) to modify the pre-reinforcement element properties and accomplish the simulation process of the pre-reinforcement; (4) to carry out the soil excavation in the upstairs and activate intermediate steel element, upper tunnel face element, and the upper primary support element; (5) to modify the properties of the upper primary support element and simulate the primary support stiffness; (6) to initiate the soil excavation to the ground and activate tunnel face element and primary lower support element; (7) to modify the lower element attributes of the primary support.
The soil is one of the most important factors of structure settlements.
With the increasing story of the framework, the settlement of building is nearly not affected, and P1 and E1 decrease slightly.
The loadings and deformations of buildings before and after the excavation of tunnel face is studied, and the influences result from the change of horizontal position of tunnels and buildings, the height of building and the soil property are analyzed.
The simulation are followed as: (1) to activate the soil, and initiate the self-weight load and reset displacement; (2) to modify the properties of basic elements and activate the structure elements; then apply the building load and reset displacement; (3) to modify the pre-reinforcement element properties and accomplish the simulation process of the pre-reinforcement; (4) to carry out the soil excavation in the upstairs and activate intermediate steel element, upper tunnel face element, and the upper primary support element; (5) to modify the properties of the upper primary support element and simulate the primary support stiffness; (6) to initiate the soil excavation to the ground and activate tunnel face element and primary lower support element; (7) to modify the lower element attributes of the primary support.
The soil is one of the most important factors of structure settlements.
Online since: October 2014
Authors: Xiao Jiang, Xue Kun Yang, Gang Zhu, Min Gang Cao
Introduction
In addition to the hereditary character of the plant itself, the variation of environmental factors such as illumination, temperature, moisture and CO2 concentration can also affect the growth and development of the plant directly [1].
The real-time values of environmental factors such as the illumination degree are shown in the picture.
When the system is in the operation status, the real-time values of environmental factors will be displayed in the textbox “####”[11].
Double click the alarming window to pop up the configuration property page of the alarming window, so as to conduct setting for operational properties and condition properties.
The values of environmental factors in the greenhouse are collected to execute the operation of the agency facilities through remote control over the greenhouse, thus reaching the purpose of regulating the environmental factors in the greenhouse.
The real-time values of environmental factors such as the illumination degree are shown in the picture.
When the system is in the operation status, the real-time values of environmental factors will be displayed in the textbox “####”[11].
Double click the alarming window to pop up the configuration property page of the alarming window, so as to conduct setting for operational properties and condition properties.
The values of environmental factors in the greenhouse are collected to execute the operation of the agency facilities through remote control over the greenhouse, thus reaching the purpose of regulating the environmental factors in the greenhouse.