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Online since: April 2014
Authors: Chuan Jun Li, Zhan Fu Zhao
Introduction
In this paper, the influence of machining parameters and the factor analysis, application oriented database model is established, based on the development of cutting database management system, realize information to add, query, and other functions and can provide reasonable and effective according to the actual production condition of cutting data, and to achieve for parts and tooling drawings and models stored in the database and realize the page to browse and download function.In the laboratory, on the basis of previous research, the development of database support for the simulation optimization software, database and simulation software of interaction, and for different data structure, database data migration between research and try.
Based on the dynamics simulation optimization algorithm Cutting force simulation algorithm for data analysis.Directly affect the machining deformation of cutting force and cutting heat, and further affect the service life of the tool wear, cutting tool and machining accuracy and machining surface quality.Cutting force and cutting power calculation, formulate reasonable cutting dosage, important parameters of cutting tools, machine tools, jig design.The Mechanical Model of cutting force (Mechanical Model) is put forward by Sabberwaal first, the Model of cutting force is assumed to be proportional to scraps cross-sectional area, the proportion coefficient depends on the cutting condition and material properties.The mechanical model of cutting force has been successfully applied to the milling process, and continuously improved in the application of.Mechanical modeling methods involved in the concentration of cutting force model, the instantaneous rigid force model can more accurately at
any time in the process of processing the size of the cutting force and direction to forecast, and thus get more extensive application of the model.Using the basic principle of transient rigid force model, establish milling dynamics equation, and to consider renewable chip thickness, can the instantaneous may occur in the process of dynamic cutting force and cutting chatter.The comprehensive factors affecting the cutting force analysis, combining with general spiral milling cutter milling forces simulation algorithm, the simulation of milling force was obtained the conceptual model, as shown in figure3: Fig3.
China Mechanical Engineering(2009),pp.1770-1774
ZHANG,D.X.YANG,H.XU.Tool Radius Compensation Algorithm for three-axis NC Peripheral Milling.Chinese Journal of Mechanical Engineering(2007),pp.138-144
Based on the dynamics simulation optimization algorithm Cutting force simulation algorithm for data analysis.Directly affect the machining deformation of cutting force and cutting heat, and further affect the service life of the tool wear, cutting tool and machining accuracy and machining surface quality.Cutting force and cutting power calculation, formulate reasonable cutting dosage, important parameters of cutting tools, machine tools, jig design.The Mechanical Model of cutting force (Mechanical Model) is put forward by Sabberwaal first, the Model of cutting force is assumed to be proportional to scraps cross-sectional area, the proportion coefficient depends on the cutting condition and material properties.The mechanical model of cutting force has been successfully applied to the milling process, and continuously improved in the application of.Mechanical modeling methods involved in the concentration of cutting force model, the instantaneous rigid force model can more accurately at
any time in the process of processing the size of the cutting force and direction to forecast, and thus get more extensive application of the model.Using the basic principle of transient rigid force model, establish milling dynamics equation, and to consider renewable chip thickness, can the instantaneous may occur in the process of dynamic cutting force and cutting chatter.The comprehensive factors affecting the cutting force analysis, combining with general spiral milling cutter milling forces simulation algorithm, the simulation of milling force was obtained the conceptual model, as shown in figure3: Fig3.
China Mechanical Engineering(2009),pp.1770-1774
ZHANG,D.X.YANG,H.XU.Tool Radius Compensation Algorithm for three-axis NC Peripheral Milling.Chinese Journal of Mechanical Engineering(2007),pp.138-144
Online since: December 2014
Authors: Yi Jiang, Chao Yi Zheng, Jun Zhe Liu, Si Yun Wu, Wu Sun
Study on the properties of sea sand concrete with fly ash
Yi Jiang a, Junzhe Liu b ,Wu Sunc, Chaoyi Zhengd and Siyun Wu e
The Architecture Engineering and Environment Faculty, Ningbo University,
Ningbo 314211, China.
Research results show that: the sea sand concrete with 20% fly ash prepared has good mechanical properties and durability; the existence of Cl- on the early strength of sea sand concrete has a positive promoting role, but has negative effective on the later development.
Study on the mechanical properties of fiber reinforced reactive powder concrete [Master's thesis].Fuzhou University. 2009, PP:32-46 [5] Hangcheng Zhu.
Study on the properties of reactive powder concrete.
Experimental analysis of the effect of different steel fiber on the properties of RPC [J].
Research results show that: the sea sand concrete with 20% fly ash prepared has good mechanical properties and durability; the existence of Cl- on the early strength of sea sand concrete has a positive promoting role, but has negative effective on the later development.
Study on the mechanical properties of fiber reinforced reactive powder concrete [Master's thesis].Fuzhou University. 2009, PP:32-46 [5] Hangcheng Zhu.
Study on the properties of reactive powder concrete.
Experimental analysis of the effect of different steel fiber on the properties of RPC [J].
Online since: October 2019
Authors: Taweechai Amornsakchai, Karine Mougin, Thapanee Wongpreedee
At a low level of PALF where aggregation was not a problem, stearic coating had an adverse effect on the mechanical properties due to the slippery PALF-rubber interface.
The high mechanical properties of PALF relateto its high cellulose content and low microfibrillar angle (14°) [6].
The most important factor influencing the properties of composites is the orientation of PALF and their aggregation.
Witayakran, All-cellulose composites from pineapple leaf microfibers: structural, thermal, and mechanical properties, Polym.
Amornsakchai, Improving the mechanical properties of short pineapple leaf fiber reinforced natural rubber by blending with acrylonitrile butadiene rubber.
The high mechanical properties of PALF relateto its high cellulose content and low microfibrillar angle (14°) [6].
The most important factor influencing the properties of composites is the orientation of PALF and their aggregation.
Witayakran, All-cellulose composites from pineapple leaf microfibers: structural, thermal, and mechanical properties, Polym.
Amornsakchai, Improving the mechanical properties of short pineapple leaf fiber reinforced natural rubber by blending with acrylonitrile butadiene rubber.
Online since: July 2015
Authors: Alin Constantin Murariu
Such micro-crack is shown in fig. 4b, where it is propagate through the heat affected zone of the cladding layer weld.
This low plasticity of the cladding layer is an in-service crack initiation factor, characteristic of thermo mechanical fatigue phenomenon, given the heating and cooling cycles of the plant.
On the macro-fractographic fracture surfaces examined were also identified stress corrosion cracking (fig. 7 - sample F3) which represent stress concentrations factors and sources of the crack propagation in the shell thickness direction.
The current metallurgical status of materials of shells 2 and 3 are similar, as attested by the structure and mechanical properties obtained by short-term tests, whose results do not vary significantly.
[2] API RP 581 Risk - Based Inspection Technology, Second Edition, American Petroleum Institute, Washington DC, USA, 2008; [3] API RP 571 Damage Mechanisms Affecting Fixed Equipment in the Refining Industry, Second Edition, American Petroleum Institute, Washington DC, USA, 2011; [4] Pierre R.
This low plasticity of the cladding layer is an in-service crack initiation factor, characteristic of thermo mechanical fatigue phenomenon, given the heating and cooling cycles of the plant.
On the macro-fractographic fracture surfaces examined were also identified stress corrosion cracking (fig. 7 - sample F3) which represent stress concentrations factors and sources of the crack propagation in the shell thickness direction.
The current metallurgical status of materials of shells 2 and 3 are similar, as attested by the structure and mechanical properties obtained by short-term tests, whose results do not vary significantly.
[2] API RP 581 Risk - Based Inspection Technology, Second Edition, American Petroleum Institute, Washington DC, USA, 2008; [3] API RP 571 Damage Mechanisms Affecting Fixed Equipment in the Refining Industry, Second Edition, American Petroleum Institute, Washington DC, USA, 2011; [4] Pierre R.
Online since: December 2010
Authors: Zhong Ming Zhang, Chun Jie Xu, Ting Wang, Lin Yang
Meanwhile, researchers have being taking a variety of measures including alloying, plastic deformation, heat treatment and rapid solidification processing to further improve the mechanical properties of magnesium alloys.
This demonstrated that reciprocating extrusion can improve the mechanical properties of magnesium alloys significantly.
Rapid solidified magnesium alloys processed by reciprocating extrusion possess more excellent mechanical properties.
Mechanism of improved fatigue behavior The mechanical properties of alloys are sensitive to their microstructures.
Factors which affect microstructures will influence strength, plasticity as well as fatigue behavior.
This demonstrated that reciprocating extrusion can improve the mechanical properties of magnesium alloys significantly.
Rapid solidified magnesium alloys processed by reciprocating extrusion possess more excellent mechanical properties.
Mechanism of improved fatigue behavior The mechanical properties of alloys are sensitive to their microstructures.
Factors which affect microstructures will influence strength, plasticity as well as fatigue behavior.
Online since: June 2013
Authors: Yu Sheng Shi, Kai Liu, Chen Hui Li, Wen Ting He
Experiments on selective laser sintering (SLS) and CIP were carried out to probe the influencing factors in the processes of forming alumina green parts.
Relative density was intricately affected by scanning speed.
As well-known, the monotonic change caused by the three factors above had the same reason as SLS parts’ relative density.
Fig. 3(b) shows that the densification of SLS alumina specimens was affected by CIP pressure.
Barbieri RA, Perottoni CA, Zorzi JE (2012) Influence of sintering Temperature on the mechanical properties of alumina springs.
Relative density was intricately affected by scanning speed.
As well-known, the monotonic change caused by the three factors above had the same reason as SLS parts’ relative density.
Fig. 3(b) shows that the densification of SLS alumina specimens was affected by CIP pressure.
Barbieri RA, Perottoni CA, Zorzi JE (2012) Influence of sintering Temperature on the mechanical properties of alumina springs.
Online since: August 2014
Authors: Huan Zhang
Cavitation Effect to the Hydraulic Piston Pump Flow Pulsation
Zhang Huan1, a
1Department of Electromechanical, Chengdu Technological University, Chengdu 611730, China
ayyyhhhlll2013@126.com
Key words: water hydraulics; axial piston pump; flow pulsation; cavitations; CFD
Abstract: The flow pulsation is one of the main factors, which affect the performance of water hydraulic piston pump, and cavitation also has importance effect on flow pulsation.
As the key element of hydraulic pressure system, the performance of hydraulic pump affects the performance of the whole hydraulic system directly.
Table 2 Physical properties of water (temperature:20℃) Density (kg/m3) Dynamic Viscosity (Pa·s) Coefficient of thermal conductivity (W/(m·K)) Specific heat (J/(kg·K)) 997.56 0.0008887 0.62027 4181.72 Mobile grid In most of the flow phenomenon, the relative motion between fluid is caused by the relative motion between solid element.
Noise and influence factors analysis of hydraulic piston pump [J].
Mechanical industry publishing house, 1985 [3] Liu Donghai Huang Xiaoyun, piston diaphragm pump and the hydraulic diaphragm pump flow pulsation analysis [J].
As the key element of hydraulic pressure system, the performance of hydraulic pump affects the performance of the whole hydraulic system directly.
Table 2 Physical properties of water (temperature:20℃) Density (kg/m3) Dynamic Viscosity (Pa·s) Coefficient of thermal conductivity (W/(m·K)) Specific heat (J/(kg·K)) 997.56 0.0008887 0.62027 4181.72 Mobile grid In most of the flow phenomenon, the relative motion between fluid is caused by the relative motion between solid element.
Noise and influence factors analysis of hydraulic piston pump [J].
Mechanical industry publishing house, 1985 [3] Liu Donghai Huang Xiaoyun, piston diaphragm pump and the hydraulic diaphragm pump flow pulsation analysis [J].
Online since: May 2015
Authors: Azizah Shaaban, Mohd Fairuz Dimin, Omar Rostam, Lau Kok Keong, Mohamad Yatim Norazlina, M. Norhidayah, Sivaraos Sivaraos, H.H. Luqman, M.R. Said
Rate and time interval of spraying technique (Pulse) significantly influence the physical properties of urea granules.
Table 1 shows the correlation of measured factors to the UG size.
These physical properties revealed the most dominant factor contributed on UG size namely SR to control the spraying angle and enhance the size as well as hardness of UG [11].
Sunada, Effect of process variables on the properties and binder distribution of granules prepared in a fluidized bed, J.
Hill, Experimental study of wet granulation in fluidized bed, impact of the binder properties on the granule morphology, Int.
Table 1 shows the correlation of measured factors to the UG size.
These physical properties revealed the most dominant factor contributed on UG size namely SR to control the spraying angle and enhance the size as well as hardness of UG [11].
Sunada, Effect of process variables on the properties and binder distribution of granules prepared in a fluidized bed, J.
Hill, Experimental study of wet granulation in fluidized bed, impact of the binder properties on the granule morphology, Int.
Online since: August 2011
Authors: Nattiree Chiranavanit, Surachai Dechkunakorn, Anak Khantachawana, Niwat Anuwongnukroh, Julathep Kajorchaiyakul, Rutchadakorn Isarapatanapong
However, annealing at temperatures below 500oC after coldworking greatly affects the properties.
This solubility allows alloying with many of the elements to modify both the mechanical and transformation properties of the system.4 Therefore, factors such as nickel content, aging, thermomechanical treatment and addition of alloying elements, affecting the structure, are important for controlling the memory behavior.15 However, substitution of copper for nickel in this investigation affected the transformation behavior and associated shape memory characteristics in many aspects.
Effect of low-temperature phase changes on the mechanical properties of alloy near composition NiTi.
Triple-stranded stainless steel wires-evaluation of mechanical properties and comparison with titanium alloy alternatives.
Melton KN, Mercier O. the mechanical properties of NiTi-based shape memory alloys.
This solubility allows alloying with many of the elements to modify both the mechanical and transformation properties of the system.4 Therefore, factors such as nickel content, aging, thermomechanical treatment and addition of alloying elements, affecting the structure, are important for controlling the memory behavior.15 However, substitution of copper for nickel in this investigation affected the transformation behavior and associated shape memory characteristics in many aspects.
Effect of low-temperature phase changes on the mechanical properties of alloy near composition NiTi.
Triple-stranded stainless steel wires-evaluation of mechanical properties and comparison with titanium alloy alternatives.
Melton KN, Mercier O. the mechanical properties of NiTi-based shape memory alloys.
Online since: June 2019
Authors: Daniel Hülsbusch, Frank Walther, Nikolai Gelinski, Eugen Schumacher, Stefan Böhm, Selim Mrzljak
Results reveal that the fatigue properties primarily depend on the imperfections of the weld seam, which are affected mostly by the discharge current and the surface topography.
The observation of improved weld seams and therefore mechanical properties with higher currents was also made by e.g. [6], but for quasi-static load.
a) b) Fig. 6: Corrosion condition depending properties: (a) maximum force Fmax,f at failure in multiple amplitude tests and (b) lifetime in constant amplitude tests Conclusions and Outlook The presented results give an impression about the variety of factors which influence the resilience of magnetic pulse welded hybrid joints regarding fatigue.
[5] Kwee I., Psyk V., Faes K., Effect of the welding parameters on the structural and mechanical properties of aluminium and copper sheet joints by electromagnetic pulse welding, World Journal of Engineering and Technology, 4 (2016) 538-561
[6] Cui J., Sun T., Geng H., Yuan W., Li G., Zhang X., Effect of surface treatment on the mechanical properties and microstructures of Al-Fe single-lap joint by magnetic pulse welding, The International Journal of Advanced Manufacturing Technology, 98 (2018) 1081-1092
The observation of improved weld seams and therefore mechanical properties with higher currents was also made by e.g. [6], but for quasi-static load.
a) b) Fig. 6: Corrosion condition depending properties: (a) maximum force Fmax,f at failure in multiple amplitude tests and (b) lifetime in constant amplitude tests Conclusions and Outlook The presented results give an impression about the variety of factors which influence the resilience of magnetic pulse welded hybrid joints regarding fatigue.
[5] Kwee I., Psyk V., Faes K., Effect of the welding parameters on the structural and mechanical properties of aluminium and copper sheet joints by electromagnetic pulse welding, World Journal of Engineering and Technology, 4 (2016) 538-561
[6] Cui J., Sun T., Geng H., Yuan W., Li G., Zhang X., Effect of surface treatment on the mechanical properties and microstructures of Al-Fe single-lap joint by magnetic pulse welding, The International Journal of Advanced Manufacturing Technology, 98 (2018) 1081-1092