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Online since: August 2018
Authors: Muhammad Agus Kariem, Rachman Setiawan, Iftika Philo Wardani
A, B, n, C, m are five parameters showing the factors affecting the von Mises flow stress.
First, spectrometry and tensile tests were carried out in order to find the chemical composition and mechanical properties under quasi-static loading, with the result as shown in Table 1.
There is a positive correlation between properties under quasi-static and high strain rate tests.
Kawata, Carbon content effect on high-strain-rate tensile properties for carbon steels.
Qin et al., Experimental study on mechanical properties of three steels.
Online since: March 2014
Authors: Claude Bathias, Chong Wang
But the mechanical aspect is specific in LCF and in GCF.
The initiation of fatigue cracks can be considered differently from physical or mechanical points of view.
According to our own observations and those in the literature two main factors are operating in the Gigacycle regime: - The stress concentration due to metallurgical microstructure misfit becomes an important parameter when the applied load is low.
It is found that gigacycle fatigue property is significantly influenced by cooling condition (ΔT in the range 12 to 65 °C).
Gigacycle fatigue in mechanical practice, 2005, M.
Online since: February 2011
Authors: Ju Li Li, Hua Feng Guo, Jian Zhong Zhou, Zhi Li, Tao Sun
Fig. 1 3D Finite element model of laser remelting Material properties and phase change treatment.Materials non-linearity has great effect on analysis result, so temperature-dependent thermophysical properties must be considered in simulation.
In this paper, the thermophysical properties parameters of substrate (Ti6Al4V) was from references [8-10], whereas Ni60A powder and WC powder’s were from references [11,12].
The thermophysical properties parameters of mixed-powder in coating are calculated by law of mixtures.
So it need multiply a proportional control factor to reduce in simulation, obviously its value is 0.96 in this paper.
Phase change latent heat is not a neglected factor for the temperature field of metal materials.
Online since: September 2013
Authors: Shou Bo Jiang, Bin Bing Huang, Guo Ying Ma, Kui Chen
But they did not use systematic analysis on technological factors of the bending forming process.
So this paper takes V-bending forming as an example, by using Dynaform software in the numerical simulation, the manufacturing process factors especially the springback effects on the bending process are analyzed, in order to achieve the optimization of stamping process parameters and reducing the times for test purposes.
Define and set the shell element types, the sheet material properties and contact types at the same time
Influence of friction coefficient Friction is an important force in sheet metal forming, which not only affects the value of forming force and energy consumption, but also directly affects the forming limit of the parts, the amount of springback, the surface quality of the parts and the life of die.
The influence of process parameters such as blank holder force, stamping velocity and friction coefficient which affect the bending and springback is researched.
Online since: August 2013
Authors: Xiu Guang Song, Hong Bo Zhang, Zhi Dong Zhou, Hong Ya Yue
The physical and mechanical properties of field test area’s foundation soil is illustrated in Tab.1.
Tab.1 The physical and mechanical properties of field test area’s foundation soil NO.
(a) foundation and flashboard (b) cucurbit wave Fig.1 Geometric model 1.3 Analysis computational results In order to reveal the affecting mechanism of the channel goaf disaster, a comparative analysis of the unfavorable foundation and natural foundation performance by numerical simulation with FLAC3D.
(1) When fill the wave with high strength material (C15 concrete), due to the big difference in property between the filling material and surrounding soils, with the upper load transfering to the composite foundation, it can be uniform settlement.
“Studying on Influencing Factors of Ground Settlement over Mined-Out Area”[J].
Online since: July 2011
Authors: Li Jie Cao
It is usefull to understand all kinds of factors and influence rules on residual stresses of FSW.
The fixture factor is considered in mechanical analysis.
Influencing factors on residual stresses in FSW The technological parameters in FSW are welding speed, rotational speed, tool pressure, shoulder diameter and geometry, outline of pin.
However, FSW is a complex coupled process with temperature change, organizational structure change, metal flow, the residual stress standard and distribution in FSW joints are effected by many factors.
Thirdly, in order to ensure safety and reliability of FSW structures, the residual stresses level and regularity of distributions should be researched from the degree on engineering application, Further works are proposed for the influence of residual stresses in FSW on mechanical characteristics, particularly fatigue properties.
Online since: April 2018
Authors: Nikolay N. Cherenda, Yurii F. Ivanov, Anton D. Teresov, Olga V. Krysina, Maria E. Rygina, Vladimir V. Uglov, Alexander P. Laskovnev, Elizaveta A. Petrikova
Sodium also affects to the gas saturation of silumin [1, 2].
However, at the presence of such amount of silicon, silumin has reduced casting properties.
The defects reduce the performance properties of the material.
The method of electron-ion-plasma modification assumes an increase in surface properties and allows saving additives.
Krysina, Mechanical Properties and Structure of the Hypereutectic Silumin Treated by an Electron Beam, Key Engineering Materials 743 (2017) 146-150.
Online since: April 2014
Authors: Li Mei Zhou, Yue Jie Dong
What is more, the reaction is sensitive to many factors interacting each other, such as kind and consumption of solvents, ratio of reagents, stirring rate, reaction time, pH of the reaction solution and reaction temperature.
The influence of the reaction temperature on the morphology, structure and optical properties of Cd1-xZnxS thin films were studied.
Conclusions Influence of the reaction temperature on the growth process and properties of Cd1-xZnxS thin films were investigated.
The effect of Zn concentration on the optical properties of Cd1-xZnxS films for solar cell applications, J.
Structural and optical properties of Cd0.8Zn0.2S thin films, J.
Online since: October 2010
Authors: Fu Hai Li, Yue Zhong Ye, Yan Ke Yang
Introduction In severe cold area, freezing and thawing is one of main factors which lead concrete damage.
So, the property of frost-resistant is one important durability index [1].
The physical and mechanical properties of concrete are studied after different times of freezing and thawing.
This phenomenon leads to crack come into being in the interior of sample, which can affect compressive property directly.
The water cement ratio not only affects interior water yield, but also affect strength before and after freezing and thawing cycle.
Online since: January 2009
Authors: Chun Yao Zhan, Wei Wang, Zhen Lei Tang, Zuo-Ren Nie
Filatov et al. have found that outstanding mechanical properties of Al alloy system with minor rare earth elements would be improved greatly[1], such as the Al alloys with Sc has got more attention to international materials field, which were considered as a new type structure material with excellent properties, especially high strength, high toughness, anti-heat and anti-corrosion specialty[2].
Nie et.al found that Er in alloy can play an important role like that of Sc and Zr, which could optimize grain structure, and improve comprehensive mechanical properties, thermal stability and weldability.
Al-Mg-Er, Al-Zn-Mg-Er and Al-Mg-Li-Zr-Er alloys have successfully developed in the same direction[5-7].The properties of Al alloys with Er depend on solution at elevated temperature, also some expecting phases formed during subsequently solidification, all related with thermodynamic properties.
Temperature affects enthalpy less intensively, namely as temperature changing greater, enthalpy changing less.
There are some key factors, such as warp of atom radius, electronegative and electron density between Al and rare earth elements.
Showing 17181 to 17190 of 26166 items