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Online since: February 2019
Authors: D.O. Zavrazhin, C. Zavrazhina
The paper evaluated the physical and mechanical properties of polyamide 6 subjected to microwave exposure.
The conducted studies show the possibility of developing target materials with unique properties using the known properties of CNTs and polymer matrix [15-17].
The physical and mechanical properties of the resulting composites were studied.
Tolstykh, Effect of microwave radiation on the formation of structure and mechanical properties of modified polymer –carbon materials in solid extension.
Amaratunga, Optical properties of polymer-nanotube composites.
The conducted studies show the possibility of developing target materials with unique properties using the known properties of CNTs and polymer matrix [15-17].
The physical and mechanical properties of the resulting composites were studied.
Tolstykh, Effect of microwave radiation on the formation of structure and mechanical properties of modified polymer –carbon materials in solid extension.
Amaratunga, Optical properties of polymer-nanotube composites.
Online since: June 2011
Authors: Jaroslaw Piątkowski
Introduction
Melting technology, especially the overheating and pouring temperature as well as the casting cooling rate, affects alloy microstructure and shaping the properties of casting determines its future application.
This type of structure adversely affects the casting mechanical properties and machinability.
Better knowledge of these phenomena can have a significant impact on further determination of the liquid alloy ability to develop certain types of crystal structure after the solidification process (cluster structure), which can improve the casting mechanical properties and performance.
This eliminated the effect of other factors, and enabled correct determination of a relationship that is believed to exist between the overheating degree and solidification parameters of the examined AlSi17 alloy.
This type of structure adversely affects the casting mechanical properties and machinability.
Better knowledge of these phenomena can have a significant impact on further determination of the liquid alloy ability to develop certain types of crystal structure after the solidification process (cluster structure), which can improve the casting mechanical properties and performance.
This eliminated the effect of other factors, and enabled correct determination of a relationship that is believed to exist between the overheating degree and solidification parameters of the examined AlSi17 alloy.
Online since: November 2010
Authors: Tetsuya Tagawa, Yoichi Kayamori, Takehiro Inoue
In addition, the crack length affects the plastic rotational factor, and this is
disadvantageous to the evaluation of shallow surface cracks in linepipes [4,5].
Secondly, the ratio of J-conversion CTOD to CMOD-based CTOD was analytically evaluated for several mechanical properties.
Twenty-three P-Vg curves of four steels, A517 [10], A533-B [11], YR70 and YR90 [12], were referred to, and their mechanical properties and CTOD test conditions are shown in Table 1, where Y/T is the yield-to-tensile ratio and S is the span of SE(B) specimens.
Table 1 Steel mechanical properties and CTOD test conditions.
The Electric Power Research Institute (EPRI) scheme [13] was used for the calculation of Jpl and Vpl, where εys is the yield strain and P0 is the limit load of SE(B) specimens. h1 and h2 are factors that relate to a/W, N, specimen configuration and constraint conditions, and are listed in the EPRI report[13]. αpl is the material factor in the plastic term of the Ramberg-Osgood relation, and was given by 0.002E/σys in this study. 1N 0 1ysysplpl P P hb J + = σεα , N 0 2ysplpl P P ha V = εα , SbB4451 P ys 2 0 σ
Secondly, the ratio of J-conversion CTOD to CMOD-based CTOD was analytically evaluated for several mechanical properties.
Twenty-three P-Vg curves of four steels, A517 [10], A533-B [11], YR70 and YR90 [12], were referred to, and their mechanical properties and CTOD test conditions are shown in Table 1, where Y/T is the yield-to-tensile ratio and S is the span of SE(B) specimens.
Table 1 Steel mechanical properties and CTOD test conditions.
The Electric Power Research Institute (EPRI) scheme [13] was used for the calculation of Jpl and Vpl, where εys is the yield strain and P0 is the limit load of SE(B) specimens. h1 and h2 are factors that relate to a/W, N, specimen configuration and constraint conditions, and are listed in the EPRI report[13]. αpl is the material factor in the plastic term of the Ramberg-Osgood relation, and was given by 0.002E/σys in this study. 1N 0 1ysysplpl P P hb J + = σεα , N 0 2ysplpl P P ha V = εα , SbB4451 P ys 2 0 σ
Online since: June 2013
Authors: Sheng Li Tian, Du Feng Li, Cheng Liu, Yin Liu, Guo Hong Cao
Its failure can seriously affect the work of drilling rig .
Temperature, air pressure, wind force, pollution, rain and snow, lightning, dust, water quality and other environmental factors may affect the sensor to work properly.
(1)Hydraulic oil temperature detection In the drilling rig hydraulic system, the hydraulic oil will lose some power in the transmission process; this part of power can converted into heat.And there is great relationship between the hydraulic oil physical-chemical properties and the hydraulic oil temperature.
The ultrasonic transducer is capable of receiving waves and producing mechanical vibration, and then transforming the mechanical vibration into electrical energy that is the output of the ultrasonic receiver.
[2] Chinese Mechanical Engineering Society for NDT “Ultrasonic Testing,” Machinery Industry Press,in press
Temperature, air pressure, wind force, pollution, rain and snow, lightning, dust, water quality and other environmental factors may affect the sensor to work properly.
(1)Hydraulic oil temperature detection In the drilling rig hydraulic system, the hydraulic oil will lose some power in the transmission process; this part of power can converted into heat.And there is great relationship between the hydraulic oil physical-chemical properties and the hydraulic oil temperature.
The ultrasonic transducer is capable of receiving waves and producing mechanical vibration, and then transforming the mechanical vibration into electrical energy that is the output of the ultrasonic receiver.
[2] Chinese Mechanical Engineering Society for NDT “Ultrasonic Testing,” Machinery Industry Press,in press
Online since: June 2014
Authors: Zheng Yang, Jian Zhong Shang, Nai Hui Yu, Yu Jun Cao
Besides, the dynamic characteristics of anti-backlash gear system have a significant effect on the performance of overall mechanism, and the torsion spring preload of anti-backlash gear is an important factor to affect the dynamic characteristic.
As we all know, the factors such as material properties of parts, structural design and processing have an important effect on dynamic characteristics.
Since the rigid-flexible model inevitably includes some finite element parts, it would affect the speed of simulation.
Rigid-flexible coupling model would be used to analyze the impact of the torsion spring preload on the dynamics of anti-backlash gear system in the next section 4 Influence of the torsion spring preload on the dynamic characteristics of the backlash gear system by rigid-flexible model The resonant frequency is an inherent property of mechanical systems, and it doesn’t substantially vary with the applied load varies.
As we all know, the factors such as material properties of parts, structural design and processing have an important effect on dynamic characteristics.
Since the rigid-flexible model inevitably includes some finite element parts, it would affect the speed of simulation.
Rigid-flexible coupling model would be used to analyze the impact of the torsion spring preload on the dynamics of anti-backlash gear system in the next section 4 Influence of the torsion spring preload on the dynamic characteristics of the backlash gear system by rigid-flexible model The resonant frequency is an inherent property of mechanical systems, and it doesn’t substantially vary with the applied load varies.
Online since: March 2010
Authors: Zhi Jian Peng, Cheng Biao Wang, Xiu Jun Du, Song Sheng Lin, Xiang Yu, Zhi Qiang Fu, Ming Jiang Dai
W-doped DLC films were synthesized from CH4 and W by ion beam deposition and magnetron
sputtering, and the influence of W target current on the surface morphology and the mechanical properties
of W-doped DLC films deposited were studied.
The introduction of metal elements into pure DLC films is a fascinating method to improve the tribological properties of DLC films for it can greatly reduce the difference at the film/metal interface and the residual stress in the films.
Mastering the influence of the deposition parameters on the tribological properties of W-doped DLC films is very important for their applications.
The adhesion between W-doped DLC films and 316 stainless steel was evaluated by a MFT-4000 surface properties tester under the conditions with a load rate of 40N/min, a end load of 100N and a scratch length of 5mm.
The particles induced by vacuum arc have less obvious influence on the tribological properties of DLC films for the structures and the properties in the different zones of the top W-DLC films are similar.
The introduction of metal elements into pure DLC films is a fascinating method to improve the tribological properties of DLC films for it can greatly reduce the difference at the film/metal interface and the residual stress in the films.
Mastering the influence of the deposition parameters on the tribological properties of W-doped DLC films is very important for their applications.
The adhesion between W-doped DLC films and 316 stainless steel was evaluated by a MFT-4000 surface properties tester under the conditions with a load rate of 40N/min, a end load of 100N and a scratch length of 5mm.
The particles induced by vacuum arc have less obvious influence on the tribological properties of DLC films for the structures and the properties in the different zones of the top W-DLC films are similar.
Online since: March 2013
Authors: Xin Wang, Kao Zhong Zhao, Chang Jiu Jiang, Xiang Rui Chen
Experimental Study on Fire Resistance Properties of Post-installed Rebar Connection
Xin Wang1, a, Changjiu Jiang1,b , Kaozhong Zhao 1,c , Xiangrui Chen 2,d
1 College of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China
2 Tongji University, Shanghai 200092, China
a wangxin@sdjzu.edu.cn, b jchj99@126.com,
Keywords: high temperature, bonded-in rebar, organic adhesive, anchorage depth
Abstract: A serial of fire tests have been conducted to study the fire resistance of the post-installed rebar connection with organic adhesive.
In the past decade years, lots of research about various factors affecting the behavior of bonded-in rebar in room temperature has been carried out [1].
According to the analysis above, the conclusion can be obtained that the anchorage depth of the rebar exerts a great influence on the mechanical properties of the anchorage beam in fire and increasing the depth properly can improve the fire resistant limit to avoid anchorage failure prematurely, which provides necessary safety margin for structures. 4 Conclusions (1) Obvious temperature gradient exists in the bonded-in beam; the closer distance to the edge of the specimens tends to the higher temperature
“Experimental research on parameters affecting anchorage performance of post-installed bars in concrete”.Journal of Building Structures S2: 275-278(in Chinese) [3] Changqing Liu, Zhoudao Lu and Zhanhong Li. 2010.
In the past decade years, lots of research about various factors affecting the behavior of bonded-in rebar in room temperature has been carried out [1].
According to the analysis above, the conclusion can be obtained that the anchorage depth of the rebar exerts a great influence on the mechanical properties of the anchorage beam in fire and increasing the depth properly can improve the fire resistant limit to avoid anchorage failure prematurely, which provides necessary safety margin for structures. 4 Conclusions (1) Obvious temperature gradient exists in the bonded-in beam; the closer distance to the edge of the specimens tends to the higher temperature
“Experimental research on parameters affecting anchorage performance of post-installed bars in concrete”.Journal of Building Structures S2: 275-278(in Chinese) [3] Changqing Liu, Zhoudao Lu and Zhanhong Li. 2010.
Online since: November 2011
Authors: Hui Yao, Li Hua Xie, Wei Yuan
This paper analyzes PET mechanical properties to confirm its feasibility and reliability.
Therefore, we can draw this conclusion: sidewall thicker, the better the mechanical properties of beer bottles.
On the one hand the requirements of the mechanical properties are safe; on the other hand the most economical material is achieved.
Conclusion Through the structural analysis of PET beer bottle, that affect the bottle resistance to internal pressure strength of the main structural factors are the thickness of the bottle and the bottle diameter.
The mechanical properties of PET beer bottle effects got analyzed.
Therefore, we can draw this conclusion: sidewall thicker, the better the mechanical properties of beer bottles.
On the one hand the requirements of the mechanical properties are safe; on the other hand the most economical material is achieved.
Conclusion Through the structural analysis of PET beer bottle, that affect the bottle resistance to internal pressure strength of the main structural factors are the thickness of the bottle and the bottle diameter.
The mechanical properties of PET beer bottle effects got analyzed.
Online since: August 2005
Authors: H. Wang, H.Y. Li, Jian Cheng Fang, Zhi Yu Zhao
Li1
1College of Mechanical Engineering and Automation, HQU, Quanzhou 362021 P.R.
China 2 School of Mechanical Engineering, DUT, Dalian 116023 P.R.
How to establish the coupling relationship among the input parameters, property of in-flight particles and coating forming, and how to control the corresponding factors to improve the forming quality during spraying, are still insufficient to investigate.
Therefore the mechanical intensity and surface quality of the mould are further enhanced.
Property of in-flight particle.
China 2 School of Mechanical Engineering, DUT, Dalian 116023 P.R.
How to establish the coupling relationship among the input parameters, property of in-flight particles and coating forming, and how to control the corresponding factors to improve the forming quality during spraying, are still insufficient to investigate.
Therefore the mechanical intensity and surface quality of the mould are further enhanced.
Property of in-flight particle.
Online since: April 2016
Authors: Leila Mahdavian, Nasim Sarami
The mechanical properties of artificial stones of provided are in table 3.
Table 3: The mechanical properties of artificial stone.
The mechanical properties of SSCF are better than WTS.
The mechanical properties of samples are more (tables 4 and 5).
The mechanical properties of them are shown in tables 4 and 5.
Table 3: The mechanical properties of artificial stone.
The mechanical properties of SSCF are better than WTS.
The mechanical properties of samples are more (tables 4 and 5).
The mechanical properties of them are shown in tables 4 and 5.