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Online since: October 2010
Authors: Yi Qun Yan, Shi Lang Xu
In this paper, based on uniaxial tension experiments of TRC plates, the loading behavior of TRC plates and influence factors on their ultimate load capacity are discussed.
Fig.1 Fig.2 Different reinforced structures Glass fibers used in the experiment Many scholars have achievements on mechanical properties of TRC structures both theoretically and practically.
In this paper, the basic properties of TRC plates are discussed both experimentally and theoretically.
Experimental investigation and results The mechanical properties of textiles and matrix.
Using the law of mixture, we can explain it [7] and simulate its mechanical properties before cracking.
Fig.1 Fig.2 Different reinforced structures Glass fibers used in the experiment Many scholars have achievements on mechanical properties of TRC structures both theoretically and practically.
In this paper, the basic properties of TRC plates are discussed both experimentally and theoretically.
Experimental investigation and results The mechanical properties of textiles and matrix.
Using the law of mixture, we can explain it [7] and simulate its mechanical properties before cracking.
Online since: September 2008
Authors: Alexander S. Chaus
Structure and Properties Enhancement in High-speed Steels upon
Primary Solidification of a Melt
A.S.
In general, different methods are used commercially to achieve cast structure refinement and, as a consequence, their properties are improved.
The relationships between the structural parameters and mechanical properties in the M2 and T30 HSS have been established.
But in some cases other factors can be considered: temperature of α↔γ transformation, stability of martensite and carbide phases, secondary hardenability, and other ability.
Summary Additions of inoculants particles and surface-active elements into the melt produce in HSS of M2 and T30 types structural changes concerning both the matrix and the eutectic constituent, simultaneously affecting the shape of the matrix grains and the morphology, number and distribution pattern of the eutectic carbides.
In general, different methods are used commercially to achieve cast structure refinement and, as a consequence, their properties are improved.
The relationships between the structural parameters and mechanical properties in the M2 and T30 HSS have been established.
But in some cases other factors can be considered: temperature of α↔γ transformation, stability of martensite and carbide phases, secondary hardenability, and other ability.
Summary Additions of inoculants particles and surface-active elements into the melt produce in HSS of M2 and T30 types structural changes concerning both the matrix and the eutectic constituent, simultaneously affecting the shape of the matrix grains and the morphology, number and distribution pattern of the eutectic carbides.
Online since: June 2015
Authors: R. Ramakrishnan, K.R. Padmavathi, K. Palani Kumar
Achieving a uniform distribution of reinforcement within the matrix is one such challenge, which affects directly on the properties and quality of composite material.
Also the effect of different reinforcement for AMMCs on the mechanical properties is discussed in detail.
It was concluded that type and morphology of CNT reinforcements are significant factors to be considered in preparing CNT–Al nanocomposites during powder metallurgy routes [14].
Naiqin Zhaoa et.al analyzed the effect of mechanical alloying on SiC distribution and the properties of 6061 aluminum composite.
Microstructure and mechanical properties of 6061 Al alloy based composites with SiC nanoparticles were studied by A.J.
Also the effect of different reinforcement for AMMCs on the mechanical properties is discussed in detail.
It was concluded that type and morphology of CNT reinforcements are significant factors to be considered in preparing CNT–Al nanocomposites during powder metallurgy routes [14].
Naiqin Zhaoa et.al analyzed the effect of mechanical alloying on SiC distribution and the properties of 6061 aluminum composite.
Microstructure and mechanical properties of 6061 Al alloy based composites with SiC nanoparticles were studied by A.J.
Online since: December 2005
Authors: V.A. Makara, L.P. Steblenko, Yu.L. Kolchenko, S.M. Naumenko, O.A. Patran, V.M. Kravchenko, O.S. Dranenko
It is shown that magnetic field action essentially affects the structuredependent
properties of Si (mechanical and electrophysical).
A growing number of publications on this subject has resulted in the emergence of a new trend in the physics of plasticity - spin micromechanics - aimed at getting knowledge of the micromechanical spin-dependent processes affecting the mechanical properties of solids.
This result has given grounds to expect alteration of the structure-dependent properties of silicon (electrophysical and mechanical) due to magnetic action.
As a response to silicon lattice defect properties modification in MF are chosen the microhardness H, as a direct characteristic of the micromechanical properties, and the surface resistivity, as a charateristic of the electrophysical properties.
The results described here show that the action of MF offers new possibilities of controlling the mechanical properties.
A growing number of publications on this subject has resulted in the emergence of a new trend in the physics of plasticity - spin micromechanics - aimed at getting knowledge of the micromechanical spin-dependent processes affecting the mechanical properties of solids.
This result has given grounds to expect alteration of the structure-dependent properties of silicon (electrophysical and mechanical) due to magnetic action.
As a response to silicon lattice defect properties modification in MF are chosen the microhardness H, as a direct characteristic of the micromechanical properties, and the surface resistivity, as a charateristic of the electrophysical properties.
The results described here show that the action of MF offers new possibilities of controlling the mechanical properties.
Online since: October 2014
Authors: Yu Tao Zhao, Song Li Zhang, Kang Le Tian, Xiu Chuan Wu
It has good mechanical properties, corrosion resistance, excellent casting properties, at the same time casting performance is good, and it is suitable for aircraft, ships and cars on some of the high demand of complicated castings[4].
The TiB2 particle aggregation and coarsening effect will make it lose nucleation function, therefore, the union of TiB2 particles is a key factor affecting the material properties[10].
Mechanical Properties of Composites.
Tensile mechanical properties of A356 alloy and composite TiB2/A356 are shown in Table 2.
Technological Study onA356 Alloy Mechanical Properties[J].Hunan Nonferrous Metals, 2004, 20(1): 23-25
The TiB2 particle aggregation and coarsening effect will make it lose nucleation function, therefore, the union of TiB2 particles is a key factor affecting the material properties[10].
Mechanical Properties of Composites.
Tensile mechanical properties of A356 alloy and composite TiB2/A356 are shown in Table 2.
Technological Study onA356 Alloy Mechanical Properties[J].Hunan Nonferrous Metals, 2004, 20(1): 23-25
Online since: February 2008
Authors: Chang Kyu Rhee, Oleg Smorygo, A. Leonov, Z.R. Ismagilov
Affect of the catalyst support pore structure upon the catalyst operational performance was
analyzed.
1.
Pore structure, porosity and material of the monolithic support define the mechanical, hydraulic and thermal properties of the catalyst as a whole.
Mechanical properties The comparative strength vs porosity data for different porous solids can be quantified, in the general case, by Eq. 1 [10].
Summary Pore structure of the monolithic catalyst support affects the catalyst operational performance: its ability to withstand mechanical loading, hydraulic losses, activity.
Limiting factors can be high superficial linear flow velocity and dynamic mechanical loading.
Pore structure, porosity and material of the monolithic support define the mechanical, hydraulic and thermal properties of the catalyst as a whole.
Mechanical properties The comparative strength vs porosity data for different porous solids can be quantified, in the general case, by Eq. 1 [10].
Summary Pore structure of the monolithic catalyst support affects the catalyst operational performance: its ability to withstand mechanical loading, hydraulic losses, activity.
Limiting factors can be high superficial linear flow velocity and dynamic mechanical loading.
Online since: February 2011
Authors: Xiao Feng Shang, Zhi Jian Wang, Dong Xue Han, Zhen Tao Xie
In the process of metal powder laser rapid forming, various defects may be caused in forming parts on account of technical parameters, equipment performance, material characteristics and other factors.
The experimental analysis finds that less or over accumulation resulting from powder feed delay is the main reason for affecting the dimensional accuracy of cladding and the main reason which affects the appearance of surface sticky powder is specific energy.
Titanium alloy has been widely used in the aerospace field since it has the significant properties such as high specific strength, corrosion-resistance, heat resistance, and so on.
It has become the trump card in the field of titanium alloy since it has the properties of heat resistance, intensity, ductility, tenacity, forming property, weld ability, corrosion-resistance and good biocompatibility.
Sun: Microstructure and Wear Properties of Laser Clad Ni-TiC Composite Coating on Titanium Alloy Substrate (Ph.D., Harbin Institute of Technology, China 2000), p. 20-28.
The experimental analysis finds that less or over accumulation resulting from powder feed delay is the main reason for affecting the dimensional accuracy of cladding and the main reason which affects the appearance of surface sticky powder is specific energy.
Titanium alloy has been widely used in the aerospace field since it has the significant properties such as high specific strength, corrosion-resistance, heat resistance, and so on.
It has become the trump card in the field of titanium alloy since it has the properties of heat resistance, intensity, ductility, tenacity, forming property, weld ability, corrosion-resistance and good biocompatibility.
Sun: Microstructure and Wear Properties of Laser Clad Ni-TiC Composite Coating on Titanium Alloy Substrate (Ph.D., Harbin Institute of Technology, China 2000), p. 20-28.
Online since: October 2012
Authors: Yan Jie Xu, Feng Jin, Jian Wen Pan
A chemo-damage model for concrete affected by alkali-aggregate reaction (AAR) is presented.
In this work, a chemo-damage model is presented for anisotropic swelling of AAR-affected concrete.
The model combines the AAR kinetics with the plastic-damage model, thus the chemical and mechanical phases are coupled.
The total damage of the material involves the mechanical damage induced by external loads and the AAR damage caused by expansive gels, thus the damage factor is defined as follows: (11) where is the mechanical damage factor.
The analysis is performed with the following mechanical properties: 193 GPa and 0.3 for the steel Young’s modulus and Poisson’s ratio and 37.3 GPa and 0.22 for the concrete Young’s modulus and Poisson’s ratio.
In this work, a chemo-damage model is presented for anisotropic swelling of AAR-affected concrete.
The model combines the AAR kinetics with the plastic-damage model, thus the chemical and mechanical phases are coupled.
The total damage of the material involves the mechanical damage induced by external loads and the AAR damage caused by expansive gels, thus the damage factor is defined as follows: (11) where is the mechanical damage factor.
The analysis is performed with the following mechanical properties: 193 GPa and 0.3 for the steel Young’s modulus and Poisson’s ratio and 37.3 GPa and 0.22 for the concrete Young’s modulus and Poisson’s ratio.
Online since: September 2011
Authors: Ali Sadrmomtazi, A. Fasihi
The Role of Nano-SiO2 Addition in the Mechanical Properties of RHA Composite Cement Mortars
A.
Incorporating nano-SiO2 into RHA mortars significantly improved the mechanical strength and water absorption properties of the products.
It has been observed that the extremely fine nano particles strongly affect their physical and chemical properties.
Some efforts on excellent mechanical properties and microstructure of cement composite with nano-SiO2 have been also reported [3].
The filler effect of nano-SiO2 is one of the important factors for the development of dense concrete/mortar with very high strength.
Incorporating nano-SiO2 into RHA mortars significantly improved the mechanical strength and water absorption properties of the products.
It has been observed that the extremely fine nano particles strongly affect their physical and chemical properties.
Some efforts on excellent mechanical properties and microstructure of cement composite with nano-SiO2 have been also reported [3].
The filler effect of nano-SiO2 is one of the important factors for the development of dense concrete/mortar with very high strength.
Online since: August 2020
Authors: Saint Willy, Adri Supardi, Dyah Hikmawati
Zn-Mg alloys will have superior mechanical properties with high biosafety [5].
This is because several factors such as temperature, composition, compacting pressure and other factors can affect the mechanical properties and also the rate of degradation of Zn-Mg alloys that can affect the surrounding tissue.
This change causes the mechanical properties of Zn-Mg alloy to be better.
The Zn-Mg alloy does not lose its mechanical properties before the bones undergo healing.
Novák, Mechanical and corrosion properties of newly developed biodegradable Zn-based alloys for bone fixation, Acta Biomat. 7 (2011) 3515–3522
This is because several factors such as temperature, composition, compacting pressure and other factors can affect the mechanical properties and also the rate of degradation of Zn-Mg alloys that can affect the surrounding tissue.
This change causes the mechanical properties of Zn-Mg alloy to be better.
The Zn-Mg alloy does not lose its mechanical properties before the bones undergo healing.
Novák, Mechanical and corrosion properties of newly developed biodegradable Zn-based alloys for bone fixation, Acta Biomat. 7 (2011) 3515–3522