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Online since: January 2013
Authors: Jiang Hua Deng, Chao Tang, Yan Ran Zhan, Xing Ying Jiang
Due to the mutual effects of electrical and magnetic and mechanical process in EMR, the theory study of EMR is difficult [3-5].
Based on this, the true stress-strain curves of 2A16 at different strain rates and temperatures were obtained by experimental method, the constitutive model of 2A16 was determined and the dynamic deformation properties were investigated.
The temperature barely affects material flow stress and strain rate strengthening effect is dominant.
Therefore, the 2A16 is affected by strain rate strengthening effect and temperature softening effect under dynamic condition.
In order to convenience, the parameter is only modified with single factor and took as a function of the strain rate, that is .
Online since: June 2013
Authors: A.R. Daneshmehr, D.J. Inman, A.R. Nateghi
It was observed that the anisotropy of the material affected the coefficients significantly.
Krawczuk and Ostachowicz [3] investigated cracked Euler-Bernoulli composite beam and the effects of material properties on the behavior of the beam, i.e. fiber orientation and volume fraction, on the behavior of the beam.
The governing equations of the composite beam is derived using Hamilton principal and can be simplified as (2) where and , , and are given by (3) In addition, we have (4) K is the shear-correction factor and should be evaluated based on the properties and stacking sequence of the laminate, though, here K is assumed 5/6 as in a rectangular section of a homogenous beam because the differences of shear-correction factors of isotropic and composite beams are shown to be negligible.
The material and geometrical properties given in the paper are as follows.
International Journal of Mechanical Science 2008, 50 : 1611-18
Online since: November 2005
Authors: Seok Won Lee, Dong Kil Shin, Seung Woo Kim, Shin Kim, Hee Kook Choi
Kiasat et al. measured the visco-elastic properties of epoxy molding compound and showed that its Poisson's ratio and bulk modulus depended on temperature, and suggested that the visco-elastic properties should be considered during the analysis [2].
The other cases showed a smile type warpage different from that of case-A. 0 5 10 15 20 -10 0 10 20 caseD caseE caseC caseB caseA Warpage (µm) Diagonal Distance (mm) Fig. 6 Measured warpage along the diagonal direction at 80 o C Visco-Elastic Material Properties of Adhesive and EMC Mechanical properties of polymer materials in electronic packaging strongly depend on temperature and time.
Therefore, visco-elastic properties should be considered in numerical analysis.
WLF factors of this adhesive are C1=-35, C2=284, and θs=50o C.
Material property of the die adhesive was also important because it affected the initial warpage state of the package.
Online since: July 2011
Authors: Shann Chyi Mou
The quality factor of the 4-9-9-14 piezoelectric actuator would affect the efficiency of the system, so the quality factorshould be known for knowing the situation of the system efficiency.
The quality factor Q is 24.97.
The appearance could be found in table, the quality factors of piezoelectric materials are not very well.
The quality factor Q is not good enough.
When L1orC2is changed, the output current is affected seriously.
Online since: July 2011
Authors: Yao Rong Feng, Jian Xun Zhang, Wen Zhen Zhao, Jun Liu, Qing Ren Xiong
The linear theory of elasticity has two main parameters: stress intensity factor K and Elastic energy release rate G.
At present, to the crack tip opening displacement (CTOD) as the property parameter of the crack initiation and a few amounts of stable propagation, a lot of research work has been done in the theory and practice.
It is the inherent property of the material.
For the heat affected zone specimens, the notch is on the intersection of the wall thickness centre line and fusion line.
[9] Huilin Gao, in :pipeline-welding behavior of microstructure and properties , Shaanxi science and technology press ,Xi’an (1995)
Online since: October 2013
Authors: Ding Bang Xiao, Bao Jun Wang, De Fu Sun, Jiang Wei Li, Lei Qiang Zong, Yi Tao
Eight or more teeth and holes at the open end and at the bottom, respectively, are employed for mechanical balance purpose to adjust the frequency split between the drive and sense modes.
Fig. 2 FEM model of the Resonator The material of the resonator is a kind of nickel alloy, whose major properties are listed in Table 1.
And the material is assumed to possess isotropic and homogeneous properties.
The material properties Name Density (kg/m3) Elastic modulus (GPa) Poisson’s ratio Nickel alloy 8,250 220 0.3 2.2 modal analysis of the resonator The modal analysis results are shown in Fig. 3.
The main conclusions from the present work are drawn as follow: The base of the resonator affect the modal frequency of the resonator.
Online since: September 2017
Authors: G.N. Safronov, N.N. Safronov, L.R. Kharisov
These parameters are controlled by the input factors characterizing the composition of the charge SHS process.
The study, using a fractional factorial design was obtained by linear approximation response functions in a given area changes controllable factors, and coded named values are presented in Table 1.
Coded* and named input values of controlled factors.
Selected indicators unevenly affect the level of the quality of SHS ferrosilid.
Kharisov Properties of ferrosilicide and high-alumina cement from dispersed waste of machine building // Litejnoe Proizvodstvo. – 2002. – №2. – С.11
Online since: December 2016
Authors: Jian Ming Gao, Bing Qi, Da Man Shen
The chemical compositions and properties of binder materials are shown in Table 1.
The properties of NCA and RCA are shown in Table 2.
Table 1.Chemical composition and physical properties of binder materials.
Conclusion The following conclusions can be drawn from studying the various factors related to the inclusion of RCA on the chloride resistance of concrete: l The incorporation of increasing amounts of RCA causes greater free chloride content assuming all other factors are equal.
Alves: Mechanical properties of structural concrete with fine recycled ceramic aggregates, Constr Build Mater, Vol.64(2014), p.103–113 [11] H.W.
Online since: August 2014
Authors: Guo He, Xiao Chuan Wang, Guang Yong Zhao
It needs to consider many factors, such as simplify of the shape, the choice of unit types, the treatment of boundary conditions, etc.
The mechanical properties of the diaphragm capsule materials are shown in table 1.
Therefore, in this paper, this device is adopted to test the elastic properties.
The relative error curve of elastic properties is shown in figure 9.
Conclusion For the prediction problem of elastic properties about the vacuum diaphragm capsule, this article utilizes the method of simulation combining with experiment to analyze its elastic properties.
Online since: June 2014
Authors: Dilli Babu G, K. Sivaji Babu, B. Uma Maheswar Gowd
Siddhartha Inst. of Technology, Vijayawada-520 007, India 3 Mechanical Engg Department, J.
Plan of Experiment Surface roughness of machined fiber reinforced composites depends on many factors like machining parameters (cutting speed, feed rate etc), cutting tool properties, work piece properties, machine tool vibrations etc.
Here, for this experimental purpose the predominant factors which affect the surface finish (cutting speed, and feed rate) were considered.
Remaining all other controllable factors was kept constant.
Assessment of some factors influencing tool wear on the machining of glass fibre-reinforced plastics by coated cemented carbide tools.
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