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Online since: May 2011
Authors: Yan Kun Zhang, Shao Yu Zhang, Xiao Er Zhou
Finite Element Analysis on Mechanical Properties of Light-weight Aggregate Concrete Composite Slab
Zhang yankun 1, a, Zhang shaoyu 2,b ,Zhou xiaoer 1,c
1 College of Architecture and Civil Engineering, North China University of Technology, Beijing, P.R.
The loading process, includes the slab cracking, the yielding of steel plates, damaging of slabs are simulated, and the influencing factors, such as male pin, thickness of deck, and spacing of transverse shear reinforcing bars, etc. is studied.
Mechanical properties of composite slab are affected by many factors, including the thickness of the steel plate, spacing of transverse shear reinforcement bars, and number of male pins.
Nine composite slab have been designed to study mechanical properties of composite slab,.
Summary Adopting finite element analysis software, the mechanical property of light-weight aggregate concrete composite slab is studied.
The loading process, includes the slab cracking, the yielding of steel plates, damaging of slabs are simulated, and the influencing factors, such as male pin, thickness of deck, and spacing of transverse shear reinforcing bars, etc. is studied.
Mechanical properties of composite slab are affected by many factors, including the thickness of the steel plate, spacing of transverse shear reinforcement bars, and number of male pins.
Nine composite slab have been designed to study mechanical properties of composite slab,.
Summary Adopting finite element analysis software, the mechanical property of light-weight aggregate concrete composite slab is studied.
Online since: March 2014
Authors: Radim Čtvrtlík, Jan Tomaštík
It has been reported that mechanical properties of hard dental tissues can exhibit size-dependent character [3].
In tribology the surface morfology is considered as one of the key factors affecting wear.
Summary Micromechanical properties and microtribological properties of human enamel and dentin were investigated.
Both methods have been proved as valuable methods for evaluation of mechanical and tribological properties of hard dental tissues on micro scale.
Balooch, Mechanical properties of human dental enamel on the nanometre scale, Arch.
In tribology the surface morfology is considered as one of the key factors affecting wear.
Summary Micromechanical properties and microtribological properties of human enamel and dentin were investigated.
Both methods have been proved as valuable methods for evaluation of mechanical and tribological properties of hard dental tissues on micro scale.
Balooch, Mechanical properties of human dental enamel on the nanometre scale, Arch.
Online since: January 2010
Authors: Praveena Nair Sivasankaran, Z. Hamedon, Azmir Azhari
This thesis deals with carbon fiber reinforced plastics (CFRP) composites, an advanced
material which is widely used in manufacturing aircrafts because of their unique mechanical and
physical properties.
Introduction Fiber reinforced plastics have been widely used for manufacturing aircraft and spacecraft structural parts because of their particular mechanical and physical properties such as high specific strength and high specific stiffness.
Carbon fibers show excellent mechanical properties compared to other fibers, i.e. high specific stiffness, very high strength in both compression and tension and a high resistance to corrosion, creep and fatigue [1].
They concluded that delamination at the drill entry and exit are affected by distinct parameters, i.e. at drill entry feed rate was the most significant factor affecting delamination whereas at the tool exit, delamination was most affected by cutting speed [5].
It is a computational technique conducted mainly to learn about the influence of various design factors and to observe the degree of sensitivity of the result to different factors affecting the quality characteristics.
Introduction Fiber reinforced plastics have been widely used for manufacturing aircraft and spacecraft structural parts because of their particular mechanical and physical properties such as high specific strength and high specific stiffness.
Carbon fibers show excellent mechanical properties compared to other fibers, i.e. high specific stiffness, very high strength in both compression and tension and a high resistance to corrosion, creep and fatigue [1].
They concluded that delamination at the drill entry and exit are affected by distinct parameters, i.e. at drill entry feed rate was the most significant factor affecting delamination whereas at the tool exit, delamination was most affected by cutting speed [5].
It is a computational technique conducted mainly to learn about the influence of various design factors and to observe the degree of sensitivity of the result to different factors affecting the quality characteristics.
Online since: May 2005
Authors: R.P. Garrett, J. Lin, Trevor A. Dean
The first is to investigate the effects of SHT proportions on the
mechanical properties of the material.
The second is the effects of quenching rates on the mechanical properties after SHT.
For this novel process it is necessary to test a number of factors of the process.
Above this value the changes in mechanical properties are small in respect to increase SHT time.
Both of these factors have a limit where no further clearance or pressure will affect the quench rate any further and thus the relationship forms an s-shaped curve with upper and lower saturation point.
The second is the effects of quenching rates on the mechanical properties after SHT.
For this novel process it is necessary to test a number of factors of the process.
Above this value the changes in mechanical properties are small in respect to increase SHT time.
Both of these factors have a limit where no further clearance or pressure will affect the quench rate any further and thus the relationship forms an s-shaped curve with upper and lower saturation point.
Online since: September 2019
Authors: Koichi Nakamura, Omayma A. El Kady, Mohsen A. Hassan, Atef S. Hamada, Peter Nyanor
The use of numerical methods such as finite element (FE) and mean field homogenization (MFH) can assist in predicting MMC properties thus reducing time and cost of optimizing composite properties through experiments.
The thorough understanding of how the microstructure of heterogeneous materials affect the effective properties aids in accurate prediction of effective properties and assist in design and development of high performance composite materials [2].
There is not much literature on FE-based simulation of thermal and mechanical properties of rGO reinforced Al composites taking into account the thermal history of the composite.
MFH does not factor the ability of heat to flow around voids in its formulation.
Bunch, “Mechanical and electrical properties of graphene sheets.”
The thorough understanding of how the microstructure of heterogeneous materials affect the effective properties aids in accurate prediction of effective properties and assist in design and development of high performance composite materials [2].
There is not much literature on FE-based simulation of thermal and mechanical properties of rGO reinforced Al composites taking into account the thermal history of the composite.
MFH does not factor the ability of heat to flow around voids in its formulation.
Bunch, “Mechanical and electrical properties of graphene sheets.”
Online since: June 2013
Authors: Han Yang, He Liu, Hao Zhang, Xiang Hong Zhang, Hong Fen Guo
Indirect coupling method includes such assumption: temperature effect causes deformation, but deformations will no longer affecting the non-coupling situation of temperature, which means simply considering the influence of heat on displacement filed, not the influence of displacement on temperature field. [5]And that the direct coupling method is able to consider the bi-directional coupling between stress strain field and temperature field, which considered more factors comparing with indirect coupling method.
All selected parameters of material refer to Mechanical Engineering Manual, Manual of Physical Properties for Metallic Material and Manual of Mechanical Properties for Metallic Material.
Fig.2 Distribution and amplification results of temperature field Fig.3 Distribution of overall displacement field and interlayer normal stress of cooker bottom Fig.4 Distribution conditions of interlayer normal stress and shear stress Because of the thermal expansion properties of materials are different, the thermal stress is caused.
Beijing: Mechanical Industry Press, 1981
Mechanical Design [M].
All selected parameters of material refer to Mechanical Engineering Manual, Manual of Physical Properties for Metallic Material and Manual of Mechanical Properties for Metallic Material.
Fig.2 Distribution and amplification results of temperature field Fig.3 Distribution of overall displacement field and interlayer normal stress of cooker bottom Fig.4 Distribution conditions of interlayer normal stress and shear stress Because of the thermal expansion properties of materials are different, the thermal stress is caused.
Beijing: Mechanical Industry Press, 1981
Mechanical Design [M].
Online since: September 2011
Authors: Yuan Tong Gu, Hai Fei Zhan
Exploration of the Defect’s Effect on the Mechanical Properties of Different Orientated Nanowires
H.F.
Molecular dynamics (MD) simulations have been carried out to investigate the defect’s effect on the mechanical properties of copper nanowire with different crystallographic orientations, under tensile deformation.
For example, great deals of numerical studies have been carried out to investigate mechanical properties of nanowires under uniaxial loading condition.
Because of the nanometre size scale, the presence of defects is one of the most influential factors in determining the nanomaterials’ properties.
Since mechanical properties of the nanowire are greatly influenced by the surface effect, the defects located on the surface will be considered.
Molecular dynamics (MD) simulations have been carried out to investigate the defect’s effect on the mechanical properties of copper nanowire with different crystallographic orientations, under tensile deformation.
For example, great deals of numerical studies have been carried out to investigate mechanical properties of nanowires under uniaxial loading condition.
Because of the nanometre size scale, the presence of defects is one of the most influential factors in determining the nanomaterials’ properties.
Since mechanical properties of the nanowire are greatly influenced by the surface effect, the defects located on the surface will be considered.
Online since: September 2013
Authors: Lian Xue, Le Le Dong
Then using the Analysis of variance to get the factors of Significantly affecting the stability and the best parameter.
Indroduction Robust design is an engineering method which errand controllable factors and uncontrollable factors by adjustment design variables and control its tolerance when a variation occurs with the design value still guarantee product qualitative plate.
Grey system, as things with correlation between factors like the degree of dynamic development trend.
On mechanical parts, products, robust design, allows the mechanical properties of raw materials, products and manufacturing variability is not sensitive to size variation, improve product manufacturability and reduce manufacturing costs.
Meanwhile, Entropy-based method can overcome the charge of enabling factors in view, more precise.
Indroduction Robust design is an engineering method which errand controllable factors and uncontrollable factors by adjustment design variables and control its tolerance when a variation occurs with the design value still guarantee product qualitative plate.
Grey system, as things with correlation between factors like the degree of dynamic development trend.
On mechanical parts, products, robust design, allows the mechanical properties of raw materials, products and manufacturing variability is not sensitive to size variation, improve product manufacturability and reduce manufacturing costs.
Meanwhile, Entropy-based method can overcome the charge of enabling factors in view, more precise.
Online since: January 2012
Authors: X.H. Yang, Xiang Cheng, J.Y. Liu, Z.Q. Tian, Xi Zhang
Custom Micro Tooling for Mechanical Ductile-mode Micro/nano Machining of Hard and Brittle Materials
X.
One of the key factors affecting successfully ductile-mode machining is micro tooling.
Among mechanical micro/nano machining processes, micro/nano milling is the most flexible one to create three dimension (3D) features for applications such as micro-electro-mechanical systems (MEMS) and the die/moulds for very high accuracy glass products.
Therefore, custom micro tooling is a necessary to provide micro tools with various tool geometries according to the workpiece material properties and workpiece geometries aiming at high accuracy, high productivity, and high surface finish achieved by ductile-mode machining.
Yamazaki:Journal of Mechanical Science and Technology, Vol. 24 (2010), p. 1 [6] X.
One of the key factors affecting successfully ductile-mode machining is micro tooling.
Among mechanical micro/nano machining processes, micro/nano milling is the most flexible one to create three dimension (3D) features for applications such as micro-electro-mechanical systems (MEMS) and the die/moulds for very high accuracy glass products.
Therefore, custom micro tooling is a necessary to provide micro tools with various tool geometries according to the workpiece material properties and workpiece geometries aiming at high accuracy, high productivity, and high surface finish achieved by ductile-mode machining.
Yamazaki:Journal of Mechanical Science and Technology, Vol. 24 (2010), p. 1 [6] X.
Online since: September 2014
Authors: Kenji Hirota, Hiroaki Hisaoka
In this study, the affecting factors on the flatness of shim rings in conventional blanking were investigated through the experiments varying the ring widths and materials.
In this study, blanking experiments of shim rings were carried out varying the materials and the ring widths, and the effect of the ring width and mechanical properties of the materials on flatness of the blanked parts was investigated.
Their chemical compositions and mechanical properties are listed in Table 1.
The Coulomb friction factor μ = 0.1 was applied for the friction between the tools and the sheet.
It was concluded that flatness of the blanked shim ring was affected by three factors of increasing manner of deflection angles during blanking, timing of separation and elastic recovery by separation.
In this study, blanking experiments of shim rings were carried out varying the materials and the ring widths, and the effect of the ring width and mechanical properties of the materials on flatness of the blanked parts was investigated.
Their chemical compositions and mechanical properties are listed in Table 1.
The Coulomb friction factor μ = 0.1 was applied for the friction between the tools and the sheet.
It was concluded that flatness of the blanked shim ring was affected by three factors of increasing manner of deflection angles during blanking, timing of separation and elastic recovery by separation.