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Online since: February 2012
Authors: Dario la Spisa, Gianluca Buffa, Livan Fratini
The mechanical properties of the welds were also found to be insensitive to relatively large changes in welding parameters.
Liao, Microstructure characterization and mechanical properties of linear fiction welded Ti-6Al-4V alloy, Advanced Eng.
Nogi, Effect of tool shape on mechanical properties and microstructure of friction stir welded aluminum alloys, Mat.
Lei, Mechanical properties of underwater friction stir welded 2219 aluminum alloy, Trans.
Mukhopadhyay, Microstructure and mechanical properties of friction stir welded copper, J Mater Sci (2007) 42:8126–8129
Liao, Microstructure characterization and mechanical properties of linear fiction welded Ti-6Al-4V alloy, Advanced Eng.
Nogi, Effect of tool shape on mechanical properties and microstructure of friction stir welded aluminum alloys, Mat.
Lei, Mechanical properties of underwater friction stir welded 2219 aluminum alloy, Trans.
Mukhopadhyay, Microstructure and mechanical properties of friction stir welded copper, J Mater Sci (2007) 42:8126–8129
Online since: June 2014
Authors: Cătălin Alexandru
The solid model of the tracking mechanism, which contains the mass and inertia properties, was developed in the CAD environment SolidWorks, and then it was imported in ADAMS through the PARASOLID file format (via ADAMS/Exchange interface).
The values domains, where the factors vary in the optimization process, have been established likewise: [1, 104] - for the proportional factors, respectively [0, 103] - for the derivative and integral factors.
The investigation strategy used to create the design matrix is based on the DOE Screening technique [16], which allows identifying the factors and combinations of factors that most affect the behavior of the system.
The idea is to consider every factor that may potentially affect the response, and use a screening analysis to determine how much each contributes to the response.
Due to the relatively high number of factors included in the optimization process (concretely, 6 factors), it was chosen the Plackett-Burman technique, with eight inputs in the design matrix (the minimum necessary of combinations).
The values domains, where the factors vary in the optimization process, have been established likewise: [1, 104] - for the proportional factors, respectively [0, 103] - for the derivative and integral factors.
The investigation strategy used to create the design matrix is based on the DOE Screening technique [16], which allows identifying the factors and combinations of factors that most affect the behavior of the system.
The idea is to consider every factor that may potentially affect the response, and use a screening analysis to determine how much each contributes to the response.
Due to the relatively high number of factors included in the optimization process (concretely, 6 factors), it was chosen the Plackett-Burman technique, with eight inputs in the design matrix (the minimum necessary of combinations).
Online since: September 2016
Authors: D.S. Robinson Smart, S. John Alexis, P.S. Samuel Ratna Kumar
Introduction
Carbon nanotube is one of the major reinforcement of composites due to their significant mechanical, electrical and thermal properties [1].
Compare to the PMC a little researches have been carried out in Metal Matrix Composite (MMC) reinforced with CNT, because of the carbide formation in the material which will affect the mechanical properties [3-8].
CNT volume fraction, distribution, aspect ratio, size orientation and interfacial bonding play a major role in composite mechanical properties [3].
Small but strong: a review of the mechanical properties of carbon nanotube–polymer composites.
Goddard III, "Energetics, Structure, Mechanical and Vibrational Properties of Single Walled Carbon Nanotubes (SWNT)", Nanotechnology 9 184-191 (1998)
Compare to the PMC a little researches have been carried out in Metal Matrix Composite (MMC) reinforced with CNT, because of the carbide formation in the material which will affect the mechanical properties [3-8].
CNT volume fraction, distribution, aspect ratio, size orientation and interfacial bonding play a major role in composite mechanical properties [3].
Small but strong: a review of the mechanical properties of carbon nanotube–polymer composites.
Goddard III, "Energetics, Structure, Mechanical and Vibrational Properties of Single Walled Carbon Nanotubes (SWNT)", Nanotechnology 9 184-191 (1998)
Online since: December 2013
Authors: Jun Liu
Reaming effect is affected by mechanical properties of coal seam, water jet’s pressure, nozzle’s diameter and so on.
The mechanical property of the first two section weak in different degree, but it is difficult to quantify it specifically.
Under the condition of numerical calculation, drilling spacing have less effect on the stress concentration factor, it can be ignored.
Fig.2 Relationship curve between the hole’s diameter and vertical stress concentration factor Stress distribution curve of coal between two adjacent holes is shown in fig.3, coal stress increases with diameter, but when the hole spacing is more than 5 meters, coal stress is no longer affected by reaming diameter, the pressure relief range of hole enlarges with the diameter.
According to the mechanical property of coal, gas deposit and occurrence depth in uncovering coal area of north wing concentrated belt dip in Daxing Mine, conclude that when the η coal dust is not less than 2.5% and exclude coal dust uniformly, the reaming measure is reliability.
The mechanical property of the first two section weak in different degree, but it is difficult to quantify it specifically.
Under the condition of numerical calculation, drilling spacing have less effect on the stress concentration factor, it can be ignored.
Fig.2 Relationship curve between the hole’s diameter and vertical stress concentration factor Stress distribution curve of coal between two adjacent holes is shown in fig.3, coal stress increases with diameter, but when the hole spacing is more than 5 meters, coal stress is no longer affected by reaming diameter, the pressure relief range of hole enlarges with the diameter.
According to the mechanical property of coal, gas deposit and occurrence depth in uncovering coal area of north wing concentrated belt dip in Daxing Mine, conclude that when the η coal dust is not less than 2.5% and exclude coal dust uniformly, the reaming measure is reliability.
Online since: July 2005
Authors: Marek Faryna, Zbigniew Pędzich
The paper deals with the results of mechanical properties and microstructure
investigations performed in two composite systems: Al2O3/WC and Al2O3/W.
Fabrication of two-phase particulate composites could be the simplest way to mechanical properties improvement.
Samples for mechanical properties measurements were sintered at 1650°C and the pressure was 25 MPa.
Comparison of mechanical properties of the Al2O3 matrix, Al2O3/WC and Al2O3/W composites.
However, apart from crystallographic factors, the properties of material under investigation may be affected by interfacial defects and interphase boundary structure.
Fabrication of two-phase particulate composites could be the simplest way to mechanical properties improvement.
Samples for mechanical properties measurements were sintered at 1650°C and the pressure was 25 MPa.
Comparison of mechanical properties of the Al2O3 matrix, Al2O3/WC and Al2O3/W composites.
However, apart from crystallographic factors, the properties of material under investigation may be affected by interfacial defects and interphase boundary structure.
Online since: January 2012
Authors: Han Zhu, Hong Mei Guo
Mechanics Analysis of Asphalt Pavement with Crumb Rubber Modified Cement Stabilized Macadam Base
Hong-mei Guo 1,2,a, Han Zhu 1,3,b
1School of Civil Engineering,Tianjin University,Tianjin 300072,China;
2Department of Civil Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China
3Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin, 300072, China
aghmtj@126.com, bhanzhuaz@yahoo.com.cn (Corresponding Author)
Keywords: crumber rubber; cement stabilized crushed stones base; mechanical properties; ANSYS; finite element analysis
Abstract: Reuse of the waste tires in highway engineering is very important for reducing pollution, protecting environment and resources.
The reflection crack not only affect the road appearance and drive comfort, and the most important thing is that greatly shortens the service life of road surface.
Feng Qin tested shrinkage property and water stability of cement stabilized macadam base with crumb rubber, it is showed that crumb rubber can decrease the shrinkage of semi-rigid base and improve the anti-erosion property of cement stabilized macadam base [8, 9].
(5)Regardless of the dead weight The main purpose of the thesis is to obtain the effect of cement stabilized macadam base with crumb rubber on mechanical properties of asphalt pavement structure by changing the thickness and modulus of base, which is very important to study this pavement structure.
The analysis of road structure mechanics response The values and developing laws of tensile compressive and shear stress generated at the base of pavement under traffic loading, are very important to analyse load bearing capability and stiffness of surface and base.One of the major factor to surface deflection is vertical compressive stress.
The reflection crack not only affect the road appearance and drive comfort, and the most important thing is that greatly shortens the service life of road surface.
Feng Qin tested shrinkage property and water stability of cement stabilized macadam base with crumb rubber, it is showed that crumb rubber can decrease the shrinkage of semi-rigid base and improve the anti-erosion property of cement stabilized macadam base [8, 9].
(5)Regardless of the dead weight The main purpose of the thesis is to obtain the effect of cement stabilized macadam base with crumb rubber on mechanical properties of asphalt pavement structure by changing the thickness and modulus of base, which is very important to study this pavement structure.
The analysis of road structure mechanics response The values and developing laws of tensile compressive and shear stress generated at the base of pavement under traffic loading, are very important to analyse load bearing capability and stiffness of surface and base.One of the major factor to surface deflection is vertical compressive stress.
Online since: September 2013
Authors: Peng Hui Zhang, Fa Xu, Jin Liang Zhang, Ming Zhang
Introduction
Diagenetic facies are rock bodies defined by distinctive diagenetic textures, which are core elements to determine the reservoir properties and hydrocarbon accumulation [1,2].
The diagenetic processes that affected the Paleocene sandstones in Lishui Sag include compaction, cementation, dissolution, and metasomatism, based on thin sections, scanning electron microscopy and X-ray diffraction.
Besides, they are also major factors affecting reservoir sensitivity.
Distribution and characteristic of diagenetic facies By settling single factor diagenetic facies to analysis of wells (Fig. 2), it is convenient for us to understand the spatial distribution of diagenetic facies.
Diagenetic facies are key factors to affect reservoir quality, especially porosity and permeability.
The diagenetic processes that affected the Paleocene sandstones in Lishui Sag include compaction, cementation, dissolution, and metasomatism, based on thin sections, scanning electron microscopy and X-ray diffraction.
Besides, they are also major factors affecting reservoir sensitivity.
Distribution and characteristic of diagenetic facies By settling single factor diagenetic facies to analysis of wells (Fig. 2), it is convenient for us to understand the spatial distribution of diagenetic facies.
Diagenetic facies are key factors to affect reservoir quality, especially porosity and permeability.
Online since: September 2013
Authors: Jiří Sís, Bedřich Votava
All types of corrosion in crude oil pipelines are affected by pH of crude oil, temperature and pressure in pipeline as well.
Many cases of pipeline failures caused by external factors like external loading or external corrosion processes also have been documented.
Corrosion rate is significantly affected by temperature and pressure as well.
The inclusions of that length could have a negative effect on mechanical properties of the tank.
- Both corrosion processes preferably occurred at the same place – in basic material nearby heat affected zone of weld joint
Many cases of pipeline failures caused by external factors like external loading or external corrosion processes also have been documented.
Corrosion rate is significantly affected by temperature and pressure as well.
The inclusions of that length could have a negative effect on mechanical properties of the tank.
- Both corrosion processes preferably occurred at the same place – in basic material nearby heat affected zone of weld joint
Online since: April 2016
Authors: Patrick de Baets, Y. Şahin
These properties along with good specific strength and modulus make them good candidate materials for many engineering situations where sliding contact is expected.
Experimental Thermoplastics exhibit superior properties such as enhanced toughness and prolonged shelf life.
Effects of control factors of the polymers are shown in Fig. 1 (a, b and c) for means SNR, respectively.
Among the control factors, the factor E showed the highest effect on the wear rate due to decreased elongation ability associated with self-lubricated property, followed by the factor S, respectively.
Kalácska: An engineering approach to dry friction behavior of numerous engineering plastics with respect to the mechanical properties, eXPRESS Polymer Letters, 7, (2), (2013), pp. 199
Experimental Thermoplastics exhibit superior properties such as enhanced toughness and prolonged shelf life.
Effects of control factors of the polymers are shown in Fig. 1 (a, b and c) for means SNR, respectively.
Among the control factors, the factor E showed the highest effect on the wear rate due to decreased elongation ability associated with self-lubricated property, followed by the factor S, respectively.
Kalácska: An engineering approach to dry friction behavior of numerous engineering plastics with respect to the mechanical properties, eXPRESS Polymer Letters, 7, (2), (2013), pp. 199
Online since: May 2016
Authors: Ageng Bekti Prakoso, Stefanus Adi Kristiawan
The mechanical properties of polymer mortar have been the subject of interest of many investigators.
Ribeiro et al. [5] showed that the most decisive factor affecting the flexural properties of polymer mortar is polymer type, followed by polymer content.
The flexural properties of UPR-mortars are affected by the UPR content especially at early age.
Handbook of polymer-modified concrete and mortars: properties and process technology.
Mechanical properties of unsaturated polyester resin.
Ribeiro et al. [5] showed that the most decisive factor affecting the flexural properties of polymer mortar is polymer type, followed by polymer content.
The flexural properties of UPR-mortars are affected by the UPR content especially at early age.
Handbook of polymer-modified concrete and mortars: properties and process technology.
Mechanical properties of unsaturated polyester resin.