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Online since: July 2015
Authors: Dmitry Burdin, Yuri Fetisov, Nikolay Ekonomov, Dmitry Chashin
In this case the ME effect characteristics depend on magnetic, electric, and elastic properties of the structure [2].
This work is aimed on investigation of the temperature characteristics of resonant ME effects in bilayer structures containing the layers of single-crystal langatate (LGT) La3Ga5.5Ta0.5O14, lead zirconate titanate ceramics (PZT) PbZr0.52Ti0.48O3, amorphous magnetic alloy (Metglas 2605S3A), and nickel (Ni) in order to determine the factors which affect temperature stability of the structures.
Temperature dependence of mechanical quality factor for ME structures.
The LGT-based structures have mechanical quality factors up to ~103 at low temperature, but Q falls down by several times with temperature growth.
The PZT-based structures have nearly constant mechanical quality factor in the 200-380 K range, their ME coefficient depends weakly on the temperature.
Online since: August 2014
Authors: Mohamed N.A. Nasr
The grain size effect even extends to other mechanical properties, like hardness, wear resistance and fatigue life [1, 5].
The effect of grain size on mechanical properties is mainly attributed to grain-boundary strengthening, which is affected by four main factors as identified by Hu et al. [2].
With regards to grain size effects, the main focus of the literature was on correlating grain size to material mechanical properties.
All other material properties were kept constant and similar to those of AISI 316L, for model validation purposes.
Tool physical properties were obtained from [12].
Online since: November 2012
Authors: Chin Chung Wei, Jen Fin Lin, Jeng Haur Horng
The model can be used in feedback positioning control factor and develop precision high speed ball-screw system.
Measuring properties included positioning error, strain on nut, temperature rising of screw and nut.
Heat convection factor and enviroment temperature always vary with time.
In the screw side, thermal effect is the major factor for elongation of screw.
Different applied normal load will affect the straightness in the radial direction.
Online since: October 2014
Authors: Eko Kurniawan, Junaidi Syarif, Zainuddin Sajuri, Mohammad Rasidi Rasani
On the other hand, mechanical properties of the sample, namely hardness was increased.
Since microstructural change is affected by the formation of bright-circle structure, diffusion of Mo element becomes the controlling factor [5,10].
Hence, an enhancement of hardness in the alloy is affected by α phase.
Yuehui, Microstructure and mechanical properties of powder metallurgy Ti-Al-Mo-V-Ag alloy, Trans.
Fujita, A.O., Chiaki Ouchi, H.Tajima, Microstructure and properties of titanium alloy produced in the newly developed blended elemental powder metallurgy process, Mater.
Online since: July 2015
Authors: Pedro José Arrazola, Ibon Poveda, Mikel Sáez-de-Buruaga
Based on individual mechanical properties of these phases, a 3D coupled Eulerian Lagrangian heterogeneous model was developed.
Issues such as composition, heat treatment and the processing method affect physical and thermomechanical properties of materials and their microstructure.
These factors in turn affect machining behavior during subsequent processing by machining [1-3].
Indeed, for example, a greater hardness of the material will result in a greater wear on the cutting tool, thereby affecting the surface integrity of the component and increasing the costs of the machining operation.
For an accurate microstructure modelling, an RGB based mapping algorithm was developed to assign specific properties to the FE elements in function of materials micrograph.
Online since: March 2018
Authors: Rostislav Drochytka, Vit Černý, Jindřich Melichar, Jan Fleischhacker
One of the most important mechanical properties of each material is its strength.
Main goal of this paper is proposal for modification of the raw materials composition and autoclave regime of aerated concrete using aluminium hydroxide in order to improve final mechanical properties and mineralogical composition.
The reaction might be accelerated by content of Ca2+.[8] Materials and Testing Methods An important factor affecting the formation of tobermoritic phases in the C – A – S – H system is the molar ratio CaO/SiO2.
In general it can be stated that Al(OH)3 is suitable admixture which improves mechanical properties of final product and ability of CSH phases crystallisation to tobermorite.
MONTEIRO: Does the Al substitution in C-S-H (I) change its mechanical property ?
Online since: August 2016
Authors: Nai Fei Ren, Liang Wang, Yun Long Wang, Lin Zhong Zhu
The single factor test method was used to study the influence of pulse energy, pulse width and repetition frequency on the quality of micro holes.
The results revealed that pulse energy is one of the biggest influence factors, large pulse energy can lead to small hole taper within a certain range, and short pulse width can reduce orifice debris and splash.
Therefore, according to the requirements of the pore processing and the thickness of the material properties, pulse width should be choosed carefully. 2.3 Effects of repetition frequency Laser pulse repetition frequency is the number of pulse laser in unit time, As shown in type (3), between repetition frequency and average power has the following relationship: P average=E×F (3) Type:E is pulse energy; P average is average power;F is repetition frequency.
This is mainly because the pulse energy and pulse width are the main factors.
(2) Among the three process parameters, pulse energy is the most important influence factor of holes quality
Online since: June 2017
Authors: Ling Pang, Zhang Chao Cui, Nai Zhi Zhang, Xue Mei Zhang, He Chuan Li
Effect of aging on physical properties of asphalt binder was studied.
Introduction During asphalt pavement construction and service, the chemical and mechanical properties of asphalt binder are changed due to aging [1-5], which may cause the deterioration of pavement properties of asphalt mixture and affect the durability of asphalt pavement [6-7].
The effects of the harden of binder on the properties of asphalt mixture have gained attention [11].
Their properties are listed in Table 1.
Study on evaluation index of low temperature properties of asphalt mixture[J].
Online since: April 2012
Authors: Sheng Zhang, Xin Wen Li, Xiang Hao Yang
Due to the particularity of rock material and complexity of dynamic testing method, it is difficult to get the rock dynamic mechanical properties accurately.
Dynamic split tension strength of marble and the properties of crack initiation and crack propagation under dynamic split tests.
Experimental study of dynamic mechanical properties for Quasi-brittle materials using the split Hopkinson pressure bar,2003,10(24):580-584.
Analytical and experimental determination of dynamic impact stress intensity factor for 40Cr steel.
Experimental study for dynamic mechanical properties of marble using split Hopkinson pressure bar.
Online since: November 2011
Authors: Toshio Haga, Hisaki Watari, Kazuya Akitsu, Shinji Kumai
Mechanical properties of the strip were investigated by tension test, bending test and deep drawing.
Mechanical properties of the strip cast by the single roll caster were as same as those made by DC casting.
The roll speed is most important factor in the roll cater.
The mechanical property of the strip with smooth scribed surface became better.
Summary Properties of a single roll caster equipped with a scraper were shown in this paper.
Showing 10111 to 10120 of 25935 items