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Online since: May 2015
Authors: Wei Hua Li, Qing An Huang, Li Li Gao
Unfortunately, assumptions have been made in these works that properties of the devices are all deterministic.
The uncertainties are mainly caused by variations in materials properties, like Young’s modulus, geometrical features, like dimensions and gaps, operating environment and boundary conditions.
With the initial design point, we consider the key geometric factors.
When beam width is larger than 9μm, the device area is severely affected.
In the future work, we would like to focus on variations of material properties and performance under multi-physics, like coupled mechanical-electrical questions.
The uncertainties are mainly caused by variations in materials properties, like Young’s modulus, geometrical features, like dimensions and gaps, operating environment and boundary conditions.
With the initial design point, we consider the key geometric factors.
When beam width is larger than 9μm, the device area is severely affected.
In the future work, we would like to focus on variations of material properties and performance under multi-physics, like coupled mechanical-electrical questions.
Online since: April 2004
Authors: Masahide Oka, Keiichiro Tohgo
The influence of the coarsening treatment on the tensile
properties, fatigue strength and fracture toughness of the material was discussed based on the
morphology of the Si particles and the fracture process.
2.
Tensile Properties Stress-strain relations and mechanical properties obtained by the tensile tests of four kinds of specimens are shown in Fig. 4 and Table 2, respectively.
The influence of the cut-out position of the specimen on the mechanical properties is caused by the size of casting defects.
Table 2 Mechanical properties of AC4CH-T6. the primary �-Al dendrites, and the fracture surface is covered with small dimples and Si particles.
The stress intensity factor range for the initial defect causing fatigue fracture can be estimated by the following equation.
Tensile Properties Stress-strain relations and mechanical properties obtained by the tensile tests of four kinds of specimens are shown in Fig. 4 and Table 2, respectively.
The influence of the cut-out position of the specimen on the mechanical properties is caused by the size of casting defects.
Table 2 Mechanical properties of AC4CH-T6. the primary �-Al dendrites, and the fracture surface is covered with small dimples and Si particles.
The stress intensity factor range for the initial defect causing fatigue fracture can be estimated by the following equation.
Online since: June 2008
Authors: C.J. Ribeiro, F. Vilaça, J. Azenha, Julio Viana
The most significant material parameters affecting amax are the yield stress, the
strain at break and their interaction (with c.a. 26-28%).
Both these values are determined by similar setting of the material properties, although with different significance.
Fig. 6 - Percentage of contribution of the material properties for HIC(d) and amax.
Varying the material properties the maximum deceleration and HIC(d) values can be adjusted and optimised.
The minimum values of HIC(d) and amax are obtained for the maximal setting of the material properties.
Both these values are determined by similar setting of the material properties, although with different significance.
Fig. 6 - Percentage of contribution of the material properties for HIC(d) and amax.
Varying the material properties the maximum deceleration and HIC(d) values can be adjusted and optimised.
The minimum values of HIC(d) and amax are obtained for the maximal setting of the material properties.
Polycrystalline Model Predictions of Flow Stress and Textural Hardening during Monotonic Deformation
Online since: June 2013
Authors: Paul van Houtte, Jaap Moerman, Philip Eyckens, Henk Vegter, Qing Ge Xie, Bert van Bael
Because of the anisotropic property at the level of each grain, texture evolution can introduce a textural hardening effect on the flow stress curve for the polycrystal, which is represented by the so-called Taylor factor, i.e. the sum of the accumulated slip on all slip systems, normalized by an equivalent measure of strain.
In principle, it can also be affected by the evolution of the CRSS on each individual slip system [4].
In other words, the rate variation effect mainly affects the plastic work at each strain increment.
The latter is represented by the Taylor factor and different models would give different Taylor factors with regard to the same texture.
The differently predicted Taylor factor evolution would further on affect the predicted evolution of the average CRSS in the polycrystal.
In principle, it can also be affected by the evolution of the CRSS on each individual slip system [4].
In other words, the rate variation effect mainly affects the plastic work at each strain increment.
The latter is represented by the Taylor factor and different models would give different Taylor factors with regard to the same texture.
The differently predicted Taylor factor evolution would further on affect the predicted evolution of the average CRSS in the polycrystal.
Online since: June 2017
Authors: Zhen Xue Shi, Xiao Dai Yue, Xiao Guang Wang, Jia Rong Li
Eq. 2 shows that the phase diagrams are based merely on thermodynamic parameters, while the kinetics factors are neglected.
This suggests that all the three single crystal superalloys have excellent mechanical Properties and practicability, which further proves aforementioned point.
That is because there are many papers and data about creep properties could be found.
The reasons are analyze as follows: (1) the calculation of JMatPro is based on the only thermodynamics principles rather than kinetics. (2) The actual creep properties of single crystal superalloys are also affected by practical conditions, such as device parameters, surface quality, orientation degrees, etc, and this kind of factors are not been considered in this article. (3) The data about ReneN5 is quite limited, which also influences the analyzing results.
Han, Effects of low angle boundaries on the mechanical properties of single crystal superalloy DD6, in: R.C.
This suggests that all the three single crystal superalloys have excellent mechanical Properties and practicability, which further proves aforementioned point.
That is because there are many papers and data about creep properties could be found.
The reasons are analyze as follows: (1) the calculation of JMatPro is based on the only thermodynamics principles rather than kinetics. (2) The actual creep properties of single crystal superalloys are also affected by practical conditions, such as device parameters, surface quality, orientation degrees, etc, and this kind of factors are not been considered in this article. (3) The data about ReneN5 is quite limited, which also influences the analyzing results.
Han, Effects of low angle boundaries on the mechanical properties of single crystal superalloy DD6, in: R.C.
Online since: June 2012
Authors: Tie Jun Chen
B.The Robustness of the slag
Concrete aggregate consistency is defined by its climate, changes in the environment or other physical factors to resist breaking ability.
Therefore, from the mechanical properties of titanium steel slag as coarse aggregate view can be used for preparing a wear resistance of cement concrete.
The selection of the coarse aggregate The coarse aggregate is an important part of the concrete, is also an important factor affecting the strength of concrete.
[3] P.Y.Zhou, Steel slag powder reactive powder concrete composition structure and properties of[D].
[6] W.J.Tang, Slag and steel slag composite powder on cement and concrete properties influence experimental study [D ].
Therefore, from the mechanical properties of titanium steel slag as coarse aggregate view can be used for preparing a wear resistance of cement concrete.
The selection of the coarse aggregate The coarse aggregate is an important part of the concrete, is also an important factor affecting the strength of concrete.
[3] P.Y.Zhou, Steel slag powder reactive powder concrete composition structure and properties of[D].
[6] W.J.Tang, Slag and steel slag composite powder on cement and concrete properties influence experimental study [D ].
Online since: August 2018
Authors: Muhammad Khusairy bin Bakri, Soon Kok Heng, Perry Law Nyuk Khui, Elammaran Jayamani
According to Sisti et al. [6, 7], environment process is one of the factors that difficult to be controlled.
Thus, throughout this research, natural fiber such as jute, mulberry and cornhusk were chosen and investigated in order to understand the factors affected the compressive strength of the composites.
According to De Carvalho Mendes et al. [14] similar mechanical properties were obtain for coir and piassava fibers, or regards of cornhusk residue.
Djafari Petroudy, Physical and mechanical properties of natural fibers, in: M.
Vazquez, Alkali treatment of jute fabrics: influence on the processing conditions and the mechanical properties of their composites, in: The 8th Int.
Thus, throughout this research, natural fiber such as jute, mulberry and cornhusk were chosen and investigated in order to understand the factors affected the compressive strength of the composites.
According to De Carvalho Mendes et al. [14] similar mechanical properties were obtain for coir and piassava fibers, or regards of cornhusk residue.
Djafari Petroudy, Physical and mechanical properties of natural fibers, in: M.
Vazquez, Alkali treatment of jute fabrics: influence on the processing conditions and the mechanical properties of their composites, in: The 8th Int.
Online since: April 2019
Authors: Inta Vitina, Inta Kirilovica, Margarita Karpe, Viktorija Sucevana
The concentration of nitrates (NO3- = 10 mg/L) is insignificant and should not affect the material.
Still, there are some other factors that can affect the corrosion process.
Despite its wide application in construction, Portland cement is not suitable for restoration due to its high density and incompatible chemical, mineralogical and physical properties.
A limited addition of Portland cement provides mechanical strength and hydraulic properties.
Alvarez, Pore structure and mechanical properties of cement-lime mortars, Cement.
Still, there are some other factors that can affect the corrosion process.
Despite its wide application in construction, Portland cement is not suitable for restoration due to its high density and incompatible chemical, mineralogical and physical properties.
A limited addition of Portland cement provides mechanical strength and hydraulic properties.
Alvarez, Pore structure and mechanical properties of cement-lime mortars, Cement.
Online since: October 2011
Authors: King Chu Hung, Yih Fong Tzeng, Ying Yao Ting
Mechanical and Automation Engineering, National Kaohsiung First University of Science of Technology, Taiwan
1 u9615903@ccms.nkfust.edu.tw, 2kchung@ccms.nkfust.edu.tw, 3franktzeng@ccms.nkfust.edu.tw
Keywords: Gas Metal Arc Welding, Wavelet Package Transformation, Fisher’s Estimation, Receiver Operating Characteristic
Abstract.
The acoustic signals were strongly related to the behavior of the arc column, the molten pool and droplet transfer in gas metal arc welding(GMAW).In this study, all the work pieces (JIS SS400) were welded at the same speed with different currents using a gas metal arc; the purpose was to observe the relationship between these factors.
The properties of the audio signals were analyzed by the wavelet-based channel energy.
Welding power and the interactive time during welding are the two influential factors affecting weld quality.
In this paper, all the work pieces (SS400) were welded at the same speed using different currents during the gas metal arc welding process in order to observe the relation between these factors.
The acoustic signals were strongly related to the behavior of the arc column, the molten pool and droplet transfer in gas metal arc welding(GMAW).In this study, all the work pieces (JIS SS400) were welded at the same speed with different currents using a gas metal arc; the purpose was to observe the relationship between these factors.
The properties of the audio signals were analyzed by the wavelet-based channel energy.
Welding power and the interactive time during welding are the two influential factors affecting weld quality.
In this paper, all the work pieces (SS400) were welded at the same speed using different currents during the gas metal arc welding process in order to observe the relation between these factors.
Online since: August 2013
Authors: W.D. Teng, Ramesh Singh, Mohd Hamdi Abdul Shukor, Ali Niakan, C.Y. Tan
The properties of porous hydroxyapatite (HA) produced by heat treatment of bovine femur bone were evaluated over different temperatures between 400ºC and 1200ºC.
The most important parameters that can affect the properties of HA are the temperature and duration of sintering [2].
Bovine bone HA’s stability and physicochemical properties varied depending on different sintering temperatures.
Properties of hydroxyapatite produced by annealing of bovine bone.
Some important factors in the wet precipitation process of hydroxyapatite.
The most important parameters that can affect the properties of HA are the temperature and duration of sintering [2].
Bovine bone HA’s stability and physicochemical properties varied depending on different sintering temperatures.
Properties of hydroxyapatite produced by annealing of bovine bone.
Some important factors in the wet precipitation process of hydroxyapatite.