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Online since: December 2014
Authors: Peter Hlaváč, Monika Božiková
Introduction
In the quality evaluation of food material, it is important to know the physical properties, particularly mechanical, rheological and thermophysical [1–3].
The knowledge about physical properties of packaging materials is also important [4].
Values of dynamic viscosity are influenced by other factors, i.e. by the amount of fat content (for milk) and also by structure (acidophilus milk) in this case.
Zeman, Mechanical properties of polyethylene foils, Journal of Central European Agriculture, 15 (2014) 138–145
Sumnu, Physical properties of foods, Springer, USA, 2006
The knowledge about physical properties of packaging materials is also important [4].
Values of dynamic viscosity are influenced by other factors, i.e. by the amount of fat content (for milk) and also by structure (acidophilus milk) in this case.
Zeman, Mechanical properties of polyethylene foils, Journal of Central European Agriculture, 15 (2014) 138–145
Sumnu, Physical properties of foods, Springer, USA, 2006
Online since: December 2012
Authors: Zeng Zhen Qian, Xian Long Lu
Because of the different geographical conditions, climatic condition, geologic origin, secondary changes, some subsoil may has the particular ingredients, structures and engineering properties.
The changing of the environment to the properties of the special soil and to the stability of the foundation are very different.
As a result, it affects the surrounding environment.
The ultimate capacity of uplift and lateral loads is important and may be the controlling factors in foundation design.
Field Test Investigations on Mechanical Characteristics of Tianshan Permafrost Region and Design Countermeasures for Its Transmission Line’s Foundation.
The changing of the environment to the properties of the special soil and to the stability of the foundation are very different.
As a result, it affects the surrounding environment.
The ultimate capacity of uplift and lateral loads is important and may be the controlling factors in foundation design.
Field Test Investigations on Mechanical Characteristics of Tianshan Permafrost Region and Design Countermeasures for Its Transmission Line’s Foundation.
Online since: March 2012
Authors: Yi Qing Cao, Li Rong Fan, Chong Ren
The forming efficiency of RP can directly affects the economic benefits of mechanical industry, and to the requirement of the forming efficiency is also higher now.
Because ObjectARX2002 is the second developing tool of AutoCAD2002 that operation speed is fast, powerful allows developers who use high-level programming language used the function expansion, and thus meet customers' various needs[3]; The application programming of ObjectARX has some characteristics that independence is strong, the property of module is good, the use is convenience and can support MFC, etc[4].
Fig.4 The chart on parallel lines filling path Fig.5 The chart on outline offset lines filling path The analysis of the forming efficiency Many factors influence the forming efficiency of RP, these factors which mainly have the length of filling track line, filling speed and acceleration and filling way, etc.
References [1] Maoliang Wu, Minglun Fang and Qingxi Hu: Journal of Machine Design and Research Vol.20 (2004), p. 43—44,57, in Chinese [2] Konstantinos A, Tarabanis: Rapid Prototyping Journal Vol.7 (2000), p. 241—252, in Chinese [3] Zhaoxia Liang, Fei Cao: Computer Aided Design and Manufacturing Vol. 7(2001), p. 43—44,51, in Chinese [4] Huijuan Xu, Zhi Xia and Gongqiong Li: Journal of Sichuan Ordnance Vol. 4(2004), p. 23—26, in Chinese [5] Fan Zhang: ObjectARX Developing Instance Tutorial(Peking ZhiFan High-tech Technology Companies, Beijing 2007), in Chinese [6] Chong Ren, Lirong Fan and Yiqing Cao: Mechanical and Electrical Engineering Technology Vol. 5(2011), p. 79—80, in Chinese
Because ObjectARX2002 is the second developing tool of AutoCAD2002 that operation speed is fast, powerful allows developers who use high-level programming language used the function expansion, and thus meet customers' various needs[3]; The application programming of ObjectARX has some characteristics that independence is strong, the property of module is good, the use is convenience and can support MFC, etc[4].
Fig.4 The chart on parallel lines filling path Fig.5 The chart on outline offset lines filling path The analysis of the forming efficiency Many factors influence the forming efficiency of RP, these factors which mainly have the length of filling track line, filling speed and acceleration and filling way, etc.
References [1] Maoliang Wu, Minglun Fang and Qingxi Hu: Journal of Machine Design and Research Vol.20 (2004), p. 43—44,57, in Chinese [2] Konstantinos A, Tarabanis: Rapid Prototyping Journal Vol.7 (2000), p. 241—252, in Chinese [3] Zhaoxia Liang, Fei Cao: Computer Aided Design and Manufacturing Vol. 7(2001), p. 43—44,51, in Chinese [4] Huijuan Xu, Zhi Xia and Gongqiong Li: Journal of Sichuan Ordnance Vol. 4(2004), p. 23—26, in Chinese [5] Fan Zhang: ObjectARX Developing Instance Tutorial(Peking ZhiFan High-tech Technology Companies, Beijing 2007), in Chinese [6] Chong Ren, Lirong Fan and Yiqing Cao: Mechanical and Electrical Engineering Technology Vol. 5(2011), p. 79—80, in Chinese
Online since: April 2010
Authors: Li Ping Liu, Bin Lin, Xiao Feng Zhang, Shi Huan Chen
The sintering product quality needs to be very high because of its difficult-to-cut property.
The factors influencing the quality of the sintered product include not only the roughcast but also the changing event of temperature distribution during sintering, namely the sintering curve.
If the neuron number of the hidden layer is too small, it will seriously affect the approximation ability of the neural network.
If the dynamic efficient mc is too big, it will make the convergence of the neural network unsteady and the kinds of instable factors will increase, too.
Yin: Application Neural Network Method in Mechanical Engineering (Publishing house of Mechanical Industry, Bei Jing, China, 2003)
The factors influencing the quality of the sintered product include not only the roughcast but also the changing event of temperature distribution during sintering, namely the sintering curve.
If the neuron number of the hidden layer is too small, it will seriously affect the approximation ability of the neural network.
If the dynamic efficient mc is too big, it will make the convergence of the neural network unsteady and the kinds of instable factors will increase, too.
Yin: Application Neural Network Method in Mechanical Engineering (Publishing house of Mechanical Industry, Bei Jing, China, 2003)
Online since: February 2024
Authors: Pavlo Agraval, Mikhail Turchanin, Liya Dreval, Anna Vodopyanova
Introduction
Metallic glasses are attractive for modern industry due to a set of unique properties, such as mechanical, magnetic, chemical, etc.
At present, information about multicomponent amorphous alloys is available mainly for individual point compositions in the form of data on conditions of production, structure, mechanical and some other physical properties.
It was determined the presence of a sufficient content of metals that are electron acceptors and donors is a chemical factor that affects the thermodynamic stability of melts and determines their glass-forming ability.
Turchanin, Thermodynamic properties of iron melts with titanium, zirconium, and hafnium, Powder Metall.
Goto, Electron transport properties of ternary metallic glasses (Ni33Zr67)1-xXx (X= Ti, V, Cr, Mn, Fe, Co and Cu): the magnetic effect on the electron transport properties, J.
At present, information about multicomponent amorphous alloys is available mainly for individual point compositions in the form of data on conditions of production, structure, mechanical and some other physical properties.
It was determined the presence of a sufficient content of metals that are electron acceptors and donors is a chemical factor that affects the thermodynamic stability of melts and determines their glass-forming ability.
Turchanin, Thermodynamic properties of iron melts with titanium, zirconium, and hafnium, Powder Metall.
Goto, Electron transport properties of ternary metallic glasses (Ni33Zr67)1-xXx (X= Ti, V, Cr, Mn, Fe, Co and Cu): the magnetic effect on the electron transport properties, J.
Online since: May 2014
Authors: Wei Ping Yan, Ying Hua Xu, Li Guo
Its performance directly affects the precision and reliability of Micro Total Analysis Systems (μTAS), and it also plays a key role in the targeting transport of trace substances.
Piezoelectric actuation is most favored due to its comparatively high stroke volume, high driving force and fast mechanical response.
As can be seen from Fig. 5 (b), the PMMA pump chamber has smooth edges, good mechanical properties, and a thickness of 500 μm.
Above all, the length-width ratio A is one of the important factors considered in valveless micropump design.
Therefore, the vibration of the piezoelectric bimorph not only acts on the fluids but also on the two lumps, so that the driving performance of piezoelectric bimorph will be affected.
Piezoelectric actuation is most favored due to its comparatively high stroke volume, high driving force and fast mechanical response.
As can be seen from Fig. 5 (b), the PMMA pump chamber has smooth edges, good mechanical properties, and a thickness of 500 μm.
Above all, the length-width ratio A is one of the important factors considered in valveless micropump design.
Therefore, the vibration of the piezoelectric bimorph not only acts on the fluids but also on the two lumps, so that the driving performance of piezoelectric bimorph will be affected.
Online since: January 2019
Authors: Kai Lin, Wen Hong Liu, Da Shun Qin, Zhi Yong Pan, Yan Long
Studies have shown that the yield strength and tensile strength properties of the tubing and casing materials show a downward trend with increasing temperature.
According to the statistical principle of data[9], three samples were used for each temperature in this test to determine the above properties.
The tensile properties of the casing material were tested in accordance with standards ASTM A370-14 and ASTM E21-09 at 20℃, 100℃, 150℃, 200℃, and 250℃.
During the process of yield strength changing with temperature, the four pipes exhibit similar thermodynamic properties.
[7] API 5C3 Bulletin on Formulas and Calculations for Casing, Tubing, Drill Pipe, and Line Pipe Properties Casing design[S]
According to the statistical principle of data[9], three samples were used for each temperature in this test to determine the above properties.
The tensile properties of the casing material were tested in accordance with standards ASTM A370-14 and ASTM E21-09 at 20℃, 100℃, 150℃, 200℃, and 250℃.
During the process of yield strength changing with temperature, the four pipes exhibit similar thermodynamic properties.
[7] API 5C3 Bulletin on Formulas and Calculations for Casing, Tubing, Drill Pipe, and Line Pipe Properties Casing design[S]
Online since: November 2011
Authors: Na Liu, Zhong Cai Zheng, Kun Jin Zhang, Hai Ou Chen, Yan Gao, Xi Bin Huang, Jin Hu Wang
The Harmonic Response Analysis of Engine Block
Based on Modal Analysis
Zheng Zhong-cai1,a, Gao Yan2,b, LIU Na1 , Zhang Kun-jin1, Chen Hai-ou1, Huang Xi-bin1, Wang Jin-Hu1
1School of Mechanical and Electrical Engineering, Shandong Jianzhu University Jinan, Shandong, 250101, China
2Shandong college of Electronic Technology, Jinan, Shandong, 250014, China
azzc638@163.com, bgaoyan12002@163.com
Keywords: Diesel engine block, Finite element, Modal analysis, Harmonic response analysis
Abstract.
Introduction The engine block is the main spare part, and its dynamic characteristic affects directly the engine dynamic characteristic, the operational performance and the work reliability, therefore it play an important role in designing engine block that the dynamic analysis to the engine block is carried on.
It is necessary that the block structure is simplified when model is established, but the calculation accuracy can not be affected, so that the finite element analysis speed can be improved.
Engine block is mainly related to solid elements, and considering the influence of various factors, 10 nodes tetrahedron element is adopted in this paper which has good applicability to the boundary curve.
Any structure or component has a natural frequency and corresponding mode shapes, which are their inherent property.
Introduction The engine block is the main spare part, and its dynamic characteristic affects directly the engine dynamic characteristic, the operational performance and the work reliability, therefore it play an important role in designing engine block that the dynamic analysis to the engine block is carried on.
It is necessary that the block structure is simplified when model is established, but the calculation accuracy can not be affected, so that the finite element analysis speed can be improved.
Engine block is mainly related to solid elements, and considering the influence of various factors, 10 nodes tetrahedron element is adopted in this paper which has good applicability to the boundary curve.
Any structure or component has a natural frequency and corresponding mode shapes, which are their inherent property.
Online since: February 2011
Authors: Yu Heng Wang, Xiao Ya Yang, Li Bing Cai, Tai Jiao Du, Fan Yuan Meng, Qing Bang Shu
Major factors influencing the ability of laser protection are thickness of anodized aluminum sheet d and surface roughness Ra.
In these two factors, it is evident that the thicker the aluminum, the more strong the ability of laser protection.
A model of ZrO2 coated aluminum sheet is established in accordance with the actual process (as shown in Fig.6), which is a structure of four layers with different thermophysical properties.
The main factor affected protective performance is surface roughness, which will be smaller, reflectivity is higher and protective performance is stronger.
[3] TAKACS, J., in: Proceedings of First Conference on Mechanical Engineering.
In these two factors, it is evident that the thicker the aluminum, the more strong the ability of laser protection.
A model of ZrO2 coated aluminum sheet is established in accordance with the actual process (as shown in Fig.6), which is a structure of four layers with different thermophysical properties.
The main factor affected protective performance is surface roughness, which will be smaller, reflectivity is higher and protective performance is stronger.
[3] TAKACS, J., in: Proceedings of First Conference on Mechanical Engineering.
Online since: January 2012
Authors: Wen Tong Tian, Hui Yang
Microstructure and Stress Variation of Semisolid 7A04 Alloy during Isothermal Compression
YANG hui1, a, TIAN Wentong1
1School of Mechanical and Technological Engineering, CIT, Changzhou 213002, China
ayangh@czu.cn
Keywords: semisolid 7A04 alloy; deformation temperature; strain rate; segregation of liquid-solid phase
Abstract: The microstructure and stress variation of semisolid 7A04 alloy have been studied through unconstrictive isothermal compressing test.
Analysis on the microstructure of compressive specimen demonstrates that segregation of liquid-solid phase is mainly affected by strain rate and deformation temperature.
Because compressive deformation is the main deformation style in the metalworking, and the compressive behavior of semisolid alloys is completely different from that of solid alloys due to its peculiar properties.
The alloy possesses strain rate sensitivity in semisolid state, which means that deformation temperature and strain rate are two key factors to determine the main deformation style of compressive deformation in semisolid state.
Analysis on the microstructure of compressive specimen demonstrates that segregation of liquid-solid phase is mainly affected by strain rate and deformation temperature.
Because compressive deformation is the main deformation style in the metalworking, and the compressive behavior of semisolid alloys is completely different from that of solid alloys due to its peculiar properties.
The alloy possesses strain rate sensitivity in semisolid state, which means that deformation temperature and strain rate are two key factors to determine the main deformation style of compressive deformation in semisolid state.