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Research on Influencing Factors of Electrostatic Force in a Micro-Force Calibration Device Lijuan Yu1, a, Yanan Niu2,b 1,2 Mechanical scientific and Engineering College,Jilin University,Changchun 130022, China atallyu@163.com, bbelievenyn@126.com Keywords: micro-force calibration, lever principle, electrostatic force reproduction, finite element analysis.
The manufacturing material of lever must be low density, high intensity and good machining property; Knife-edge bearing must be small incision radius, high hardness and low friction coefficient.
For a manufactured one-dimensional capacitor, the capacitance gradient dC/dz is its inherent property.
For other influencing factors, this paper conducted the following research by Maxwell.
Because the error of the mean value with the theoretical value is 4.93%,simple change of the thickness of the internal electrode end cover have no significant affect on the electrostatic force. 3) The influence of the thickness of the insulating layer outside the external electrode Capacitor need stable voltage applied between the electrodes,but the external electrode exposing is not safe,thus it must be insulated.The purpose of this study is to explore the relationship between the thickness of the insulating layer and electrostatic force.

Zhang et.al. [2] investigated the mechanical properties of nuclear pressure vessel steel and its welded joints by using the micro shear test method.
Olcay Ersel Canyurt [6] has developed the GA based Welding Strength Estimation Model (GAWSEM) to estimate the mechanical properties of the welded joint for the brass materials.
The chemical composition (wt %) of base plate and electrode wire, 3.15 mm diameter (AWS A/S 5.17: EH 14) is shown in table (1) and the mechanical properties of the test plates are given in table 2.
Based on the pilot study results, current, traverse speed and stickout are identified as the control factors and the levels of the factors are decided.
Dorn: Investigation on the possibility of using the Microshear Test as a Surveillance Method to Estimate the Mechanical Properties and Fracture Toughness of Nuclear Pressure Vessel Steel, A508CL3, and its Joints Welded by Narrow-Gap Submerged-Arc Welding, International Journal of Pressure Vessels and Piping 76 (1999) 35–41

This method will take account of friction, contact, preload, external load eccentric, bolt bending and other non-linear factors.
At last, numerical simulation experiment will be proposed with the method to figure out the key factors which affect bolted joint behavior.
The geometrical properties of the slewing bearing used for this paper are shown in Fig.2.
The geometrical properties of the slewing bearing are shown in Fig.2.
Based on numerical simulation experiment with this finite element model, the factors of preload intensity and support plate thickness are analyzed.

Introduction Selecting materials for a large number of components to be used in biomedical devices depends on several factors.
Moreover, it must have an excellent corrosion resistance and appropriate mechanical properties.
Titanium and titanium alloys are well-suited as clinically used biomaterials because their biological, mechanical and physical properties play significant roles in the longetivity of the protheses and implants [1].
The elastic properties of the Ti-13Nb-13Zr alloys were determined by internal friction and oscillation frequency measurements using Flexural Vibration of the first tone of samples in Acoustic Elastometer System (Vibran Technology® ), AE-102 Model) [12] operating in a kHz bandwidth, and Torsional Vibration of the samples in Kê-type [13] Torsion Pendulum operating in a Hz bandwidth.
Materials Science Forum: Mechanical Spectroscopy Q -1 2001, Trans Tech Publications LTD, Laubisrutistr, CH; 2001

The instrumented nanoindentation technique is widely used to investigate the local mechanical properties of cementitious composites.
It is important to understand the relationship between local mechanical properties and nano-scale system in order to enhance the properties of both cement and concrete.
Hertzian contact or finite element model) to obtain the mechanical properties of the material.
Hence, numerical simulation enables replication of the indentation process in order to gain an understanding of the mechanical properties of the material.
The mechanical properties (E and H) calculated from the models with single phases (homogeneous) are comparable with the experimental findings. 2.

Mechanical properties and air resistance (in the case of coatings) according to Gurley were investigated.
Results and Discussion Effect of Nanoparticle Fillers Obtained from Wood Bark on the Mechanical Properties of Paper Sheets.
The gel concentration affects also the mechanical properties of the coated paper sheets.
As for nanoparticle fillers, the coatings obtained from extracted bark affect the properties of paper sheets to a greater extent.
Chanda, Mechanical properties of wood-fiber reinforced polypropylene composites, Composites Part A. 38 (2007) 227-233

betog@fc.unesp.br Keywords: Superconductivity, mechanical spectroscopy, interstitial oxygen, superconducting oxides.
When oxygen is present interstitially, it strongly affects the physical properties of the material.
The oxygen content is a crucial factor to determinate the superconducting and other physical properties in Sm-123 high Tc superconductors.
A mechanical-loss peak was observed and associated to the interstitial oxygen mobility in the basal plane.
The mechanical spectroscopy measurements showed a relaxation peak whose intensity is directly proportional to excess oxygen content.

Properties of the material of coins vary during their production and there is the so-called operational degradation that can be caused by an inappropriate technology of manufacturing.
All these factors affect the reliability of dies expressed as service life – number of coins produced by one die.
Determination of selected mechanical properties: dynamic hardness, adhesion - indentation Rockwell test, service life.
Selected mechanical properties High operational loading of coining dies (approx. 750 strikes per min) result in strict requirements on the quality of materials and technological procedures during their manufacturing.
Tab. 1 Coating thickness measured by Calotest and mean values of selected mechanical properties of coining dies Coat Thickness [µm] Nanohardness [GPa] Adhesion – HF class Number of produced coins CrN 2.80 - 2.90 14.06 HF 2/3 50 060 TiCrN 1.09 - 1.76 30.70 HF 1/2 183 751 WC/C 4.94* 12.38 HF5 28 659 * the average value of three layers: t1+t2 +t3 (2.51 µm+0.61 µm+1.82 µm) CrN TiCrN WC/C Fig. 5 Appearance of indentations after Rockwell indentation test using load 1500 N Summary Of the realized tests we present the following conclusions: · of the tested and documented surfaces of coatings the TiCrN coat exhibited the finest morphology, i.e. the lowest roughness, highest hardness – 30.70 GPa and excellent adhesion properties of class HF1/2

Based on the above mechanical model, the capacity expression of normal section for the CFRP reinforced specimen under axial compression is shown as Formula (1) (1) The above equation shows that when the specimen is under axial compression, the CFRP on the surface of specimen can give full play to its mechanical properties.
But when the specimen is in a state of small eccentric compression, the stress of CFRP on each surface is different, and the CFRP can not give full play to its mechanical properties.
The eccentricity of the specimens in each group is different but other factors are the same.
The result is that there is a greater restraining action near the eccentric side than the other side, which cause that the CFRP can not give full play to its mechanical properties.
Experimental study on the mechanical properties of concrete.

Natural fibres are preferred compared to synthetic fibres because of several advantages such as biodegradable, lightweight, low cost and good mechanical properties.
Tensile properties of roselle fibre were performed to study the tensile properties.
Other advantages include low cost, good mechanical properties, abundantly available, material renewability, biodegradability and abrasive in nature for ease of recycling[1]–[3].
Several significant mechanical properties can be obtained from tensile test such as Young’s modulus, tensile stress, maximum elongation, tensile strain and yield stress.
Increased concentration of NaOH solution affects the tensile properties of roselle fibre.