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Online since: July 2023
Authors: Ramiza Ali, Amina Safdar, Jaala Mishal, Aneela Shahzad
Different parameters of dielectric properties were investigated.
Various considerations, such as preparation methods, calcination temperature, chemical compositions, ionic charge, size distribution affect the dielectric properties of strontium hexaferrites [34].
“Quality factor is the reciprocal of dissipation factor which is the tangent loss [36].”
In a nutshell, based on dielectric properties composites with a concentration of 0.20 have best dielectric properties than other composites.  
Baykal, “Structural and magnetic properties of Ce-doped strontium hexaferrite,” Ceram.
Online since: November 2005
Authors: Dong Kil Shin, Seung Woo Kim, Shin Kim, Hee Kook Choi, Seok Won Lee
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: September 2019
Authors: Margarita Aleksandrovna Skotnikova, Zi Xi Wang, Alexey Alexandrovich Alkhimenko, Boris Aleksandrovich Shemyakinskiy
The layout and weight of the drill string and its individual sections significantly affect the technical and economic indicators, which imposes certain restrictions on the choice of drill pipe materials and safety factor.
Aluminum alloys have valuable physical and mechanical properties, which distinguishes them from steels, the traditional material for the manufacture of drill pipes.
Aluminum alloys are characterized by stability of mechanical properties at low temperatures, high processability in the process of processing by pressure and cutting.
Ttribotechnical properties of composite material “aluminum–carbon nanofibers” under friction on steels 12KH1 and SHKH15.
Antiwear properties of composite greases “LITOL-24–magnesium hydrosilicate particles”.
Online since: May 2011
Authors: Li Jun Han, Yi Jiang Zong, Gui Lei Han
Study on Shear Properties of Rock Structural Plane by Grouting Reinforcement Yijiang Zong a, Lijun Han b, Guilei Han c State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China azongyijiang@126.com, bhanlj@cumt.edu.cn, changuilei@163.com Keywords: Rock Structural Plane, Shear Strength, Mechanical Properties, Grouting Reinforcement, JRC-JCS Mode Abstract.
So the study of mechanical properties of structural plane is of great theoretical and engineering application value.
But the study of the mechanical properties of structural plane after grouting seldom reports so far.
This shear rheometer can be used to study rock long-term deformation and strength index under shear stress, can also be used for the measurement of mechanical properties of rock under quick shear.
In engineering practice, grouting can improve RS of the cracked rock mass, providing a larger safety factor.
Online since: December 2010
Authors: Gai Fei Peng, Juan Yang
However, from many fire accidents in construction, it is concluded that long-duration fire or high-temperature results in a serious loss of concrete properties, even lead to structural damage or building failure [1].
Furthermore, results many experimental investigations showed that steel fiber can enhance the residual mechanical properties of HPC at high temperature significantly [26-28].
(2) It is the large number of influencing factors that make the study on explosive spalling mechanism more complex.
Pore vapor pressure and thermal stress are the major influencing factors, and especially the former is more favorable.
The influence of high temperature on explosive spalling behavior and mechanical properties of reactive power concrete [D].
Online since: September 2015
Authors: Irene Calliari, Marco Breda, Caterina Canovaro
The standardless mode with the ZAF correction, which uses fundamental factors to correct the effects of atomic number (Z), absorption (A) and fluorescence (F) was used for chemical analysis.
It is not surprising because alloys with high Pb content are very castable but they are not suitable for mechanical working.
OM micrograph of a Cu-Pb-Sn coin The microstructure confirms, as expected for a metallurgist, that Cu and Cu-Zn coins have been obtained by mechanical working and annealing, while the Cu-Pb-Sn have been solidified in an impressed mould or have been struck without any previous mechanical working.
The XRF data, with Cu in the range of 85 - 30%, Sn in the range of 2 - 17% and Pb in the range of 8 - 60% suggest that the surface layers of the coins could be affected by segregation or corrosion processes.
The thickness and morphology of the corrosion layers depend on chemical composition and microstructure of the alloy, on the physic-chemical properties of the environment where the coin was buried [8, 9] and on the polishing treatment after the excavation.
Online since: July 2022
Authors: Nicolas Montes, E. García, Ivan Peinado-Asensi
The stamping process is made up of more than 40 variables that directly or indirectly affect the process.
Methodology In the world of stamping, the working parameters for the production of the different car body parts are obtained through simulation, where from some inputs such as properties of the material to be used, geometry, type of lubrication, etc., we can obtain the outputs to be configured in the press such as the stamping speed, materials, tonnage, etc., to produce parts within quality margins.
This can be due to different factors such as die wear [6], change in the properties of the material in the sheets obtained from the end of the coil or even due to a bad working condition of the press.
In short, tonnage is a highly sensitive variable to any change in the process parameters that can affect the machine health and the quality of the part.
Towards Real Time Predictive System for Mechanical Stamping Presses to Assure Correct Slide Parallelism. 
Online since: June 2019
Authors: Zu Ming Hu, Guang Yu Duan
Owing to the special structure of meta-type benzene-amide linkage, PMIA exhibits outstanding thermal stability (Tg = 278 °C), excellent flame retardancy, high operating temperature and good mechanical property.
SEM images of impact fractures of (a) fBN-0, (b) fBN-30 Dielectric property of PMIA/fBN composite For electronic insulation materials, dielectric properties are vital to meet specific requirements.
The dielectric properties of PMIA/fBN composites were tested in the frequency range of 102-106 Hz, as manifested in Fig. 2(a&b).
This can be mainly attributed to two factors: (ⅰ) with increasing content of fBN, fBN particles can connect with each other to form heat transfer pathways, which can improve thermal conductivities of PMIA/fBN composites. (ⅱ) it is well known that the interface thermal resistance is a key factor affecting the thermal conductivity in organic-inorganic hybrid composites, and reducing it can improve the thermal conductivity significantly [12].
Improved thermal conductivity and dielectric properties of hBN/PTFE composites via surface treatment by silane coupling agent[J].
Online since: April 2021
Authors: Xue Wei Li, Hui Zi Zhou
All these factors promote the polarization of public opinion transmissions in a self-media network.
Each time a popular topic is accepted, the energy of the self-media user can be increased, which has the property of diminishing returns.
This is because the initial temperature and probability parameter are the indirect action factors and the direct action factors, respectively, of the transmission probability, which can keep the transmission probability from obtaining a larger value for a long time and prolong the propagation time and range of the event.
This section takes the "Liu Guo Liang's resignation event" as an example in order to study the relationship between these two metrics and the influencing factors
Chinese journal of mechanical engineering, 2016, 52(6)166-173
Online since: September 2011
Authors: Peng Qi, Zhi Rong Mei
For designing cavities in salt rock, the creep behaviour and, in particular, the volume convergence are two of the key factors placing restrictions on the depth and minimum allowable cavity pressure.
Many experimental investigations on mechanical properties, especially creep properties, of ‘‘pure’’ salt rock have been carried out3-5.
Although data on mechanical properties of the impure, composite layered or non-salt strata in bedded deposits are studied far less common than data on pure salt, different creep models have been proposed for salt rock6-8.
Up to now, The above studies tend to only care about the rock mass mechanical model and the relevant parameters.
It is the main factor that controls the gas pressure distribution and seepage of gas storage.
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