Search results

Asymmetric meshing affects predicted buckling load, buckling mode shape and post-buckling behaviour.
Asymmetric meshing affects only the stiffness matrix K and does not affect the loading vector F in F = Kx relationship.
The mechanical properties of CFRP are: Elastic modulus E11=52000 N/mm2, Elastic modulus E22=52000 N/mm2, Shear modulus G12=2350 N/mm2, Poisson’s ratio n12=0.302.
The load factors for AMTs AT1, AT2, AT3 and AT4 were 0.970, 0.956, 0.954 and 0.953 respectively.
The load factors for AMTs AF1, AF2, AF3 and AF4 was 0.957, 0.943, 0.940 and 0.939 respectively.

Assuming that the wave attenuation coefficients in Si and LiNbO3 at the lowest resonant mode of the thickness oscillations keep the same values as at frequency 1 GHz, then the values of Q-factors of Si () and LiNbO3 () will be: Q1 = 46-36, Q0 = 1100.
But the resulting value of Q-factor of the multilayer structure will be lower than the mechanical value of Q-factor of Si, since there are still structural energy losses caused by the attachment and sealing of the structure, and losses at the boundaries of the semiconductor-piezoelectric section.
It can be assumed that the thermal action will more effectively affect the processes of "healing" of defects caused by the implantation of impurities.
The resonant method of measuring the value of Q-factor is the more accurate the higher the figure of Q-factor.
The symmetric and asymmetric multilayer structures of a semiconductor-piezoelectric are analyzed on the basis of a model of a “thin and wide” plate and approximate expressions are obtained for maximum deformation in a silicon wafer as a function of the material properties of a semiconductor and piezoelectric material and their structural features. 2.

Blends will be endowed with the better properties from original components, such as mechanical properties and hydrophilic character, etc.
To compare the mechanical properties of NR and modified NR films, mechanical properties tests were operated according to GB7543-2006.
Good dispersion of the filler particles is a crucial factor to obtain admirable mechanical properties [29].
Mechanical properties and elongation at break of NR films modified by PMMA, PMMA-CPL and PMMA-CPL-SS.
Rheological, mechanical and morphological properties of thermoplastic vulcanizates based on NR-g-PMMA/PMMA blends, J.

The main advantage of workpieces produced by ring rolling, compared to other technological processes, is given by the size and orientation of grains, especially on the worked surface which give to the final product excellent mechanical properties.
The software, due to self centring properties, lets to simulate the process without the Guide rolls.
All the tools were simulated as rigid bodies and between the rolls and the workpiece a shear friction factor equal to 0.7 was set.
On the contrary the maximum Idle seems to be less affected by the speed laws.
[5] Zhou G., Hua L., Qian D., Shi D., Li H., Effects of axial rolls motions on radial-axial rolling process for large-scale alloy steel ring with 3D coupled thermo-mechanical FE, International Journal of Mechanical Sciences. 59 (2012) 1-7

In addition of the good biocompatibility of HAp, the dielectric properties of these bioceramics have been evaluated in numerous studies [12-14].
Also, it has been found that such properties of HAp are greatly affected by various parameters such as Ca/P ratio and sintering temperature [15].
The dielectric properties of MgTiO3, Mg2TiO4 and MgO and their effective applications in electric equipments have been proven [20].
However, further work is needed to investigate the electrical properties and identify optimal HAp and β-TCP levels that satisfy electrical performance criteria.
Other properties and electrical performance of these nanostructured materials will be carried out in our research center.

Mining events experienced by all categories of personnel are brought about a range of psychological, physiological, and behavioral changes from multiple aspects affecting their physical and mental health.
It is divided into two main categories: one is for emergencies caused by natural and man-made factors, such as: floods, earthquakes, and so on.
These people need to be timely, professional psychological assistance and treatment, otherwise, will affect their life.
But unexpected public events of crisis intervention, is not just for these people, but for all stakeholders and individuals or groups affected by the event.
If psychological assistance do not follow-up, some trauma is likely to add to the permanent personality disorder, affecting the development process trauma throughout the life of the object.

There are many factors affecting the morphology of electrospun nanofiber, including, the internal factors (such as solution viscosity, conductivity, and so on), the external factors (such as electric field intensity and feed speed, and so on) [1, 3]; the factors that affects the macro support shaped by the RP method, includes temperature, feed speed, material parameters, and so on.
For the above forming part of the process parameters on the impact of the results, feeding rate which is the common factor of the electrostatic spinning and RP, has a very significant impact on the controllability of the quality of the scaffolds.
Repeating the above steps, a precise shape, porosity control, good mechanical properties of bone regeneration scaffold can be created.

When the concentration is exceeded, restructuring processes take place in the cement system, leading to deterioration of the properties of the composite binder.
By controlling the composition, concentration, fineness and other parameters of the cement composite, one can achieve high performance properties of the final product.
Kharchenko, Structure and properties of soil concrete masses based on nano-modified microcements, Housing construction. 9 (2016) 55-58
Kastyurina Study of the effect of chemical additives on the properties of cement systems, Vestnik of Polotsk State University.
Jasko, Effect of plasticizers on the properties of cement with the addition of calcium sulfoaluminate, Technique and technology of silicates. 22 (2) (2015) 25-28

Vibration analysis based on the mathematical model of the air-suction device tillage seeder seeding Xu Zhanga, Manquan Zhaob , Fei Liuc, Shuai Dong, Yueqin Liu Mechanical and Electrical Engineering College of Inner Mongolia Agricultural University, Hohhot 010018 China aZhangxuzxy2013@sina.com, bnmgzmq@yahoo.com.cn.
cafei2208@163.com ＊Corresponding author: Manquan Zhao Keywords: Air-suction tillage planter; vibration characteristics; mathematical model ; seeding device Abstract: In order to study air-suction when tillage planter in the field farming, Vibration due to the surface roughness of the resulting excitation tillage effects on seed planter of the device, Derivation of the air-suction device tillage planter seeder vibration characteristics of the mathematical model, Vibration characteristics of the mathematical model derived gas suction device tillage seeder seed planter primarily by structural properties, Forward speed when operating, Seed row distance between the soil surface, Soil roughness and soil sticky decision.
Air-suction tillage planter by crop residues, stubble and soil affect irregularities in the work process, so that no-till seeder air-suction generating random vibration during operation, thereby affecting the reliability and seed planter box air suction Seed quality.
Effect of vibration by about two aspects of seed box: first, by learning the basic laws of dynamics and vibration or theorem [4], the establishment of air-suction vibration mathematical model tillage planter, planter can field vibration test influencing factors and provide the overall structure optimization tillage planter provide a theoretical basis; Second, by field vibration test, vibration spectrum analysis, research tillage planter seed box vibration characteristics.
Vibration mathematical model For secondary factor vibration characteristics and seeding performance of air-suction device tillage seeder seeding ignore the impact model to sit before the following assumptions: first, assuming that the individual components are rigid no-till planter.

In this paper, the effects of contents of Fe and P on the microstructures and properties of Cu-Cr-Zr resistance spot welding electrode alloys have been studied by means of electrical conductivity and hardness measurements and optical microscopy.
The mechanical property was determined using Vickers hardness measurement with 200g load.
Obviously, the content of different alloying elements is the main factor affecting the crystallization behavior of Cu-Cr-Zr-Fe-P alloy.
Study on the Microstructure and Properties of the aged Cu-Cr-Zr-Mg-RE alloy [J].
Effect of Boron and Cerium on microstructures and properties of Cu-Fe-P alloy.