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But up to now, there are no systematic studies on slip-drilling pipe's contact mechanical behavior under different parameters at home, and no correlational research article was found.
From the Mechanical Design Manual, we can know that the friction coefficient between steel and steel without lubricant have the equation: μ= 0.15, therefore, μ1= 0.3159.
The plastic damage to drilling pipe in field experiment Conclusions The slip dog's profile parameters directly determine the contact mechanical properties between the slip and drilling pipe.
This paper has produced a complete set of method to assess the performance of slip dog's structural parameters, and this method is universal and practical.Elastic-plastic contact finite element analysis is an effective means to study drilling pipe-slip contact mechanical properties, which can be used to calculate a variety of slip chucking cylindrical tools.
[3] TIAN Hongliang, HU Shaoyun: Experimental study on frictional factor between chuck jaw and drilling rod, edtied by Coal Geology &Exploration,(2003)

Oil Film Temperature Field Simulation of Hydrostatic Center Rack of Heavy-duty Horizontal Boring Lathe Junpeng Shaoa, Chong Lib , Xiaoqiu Xuc , Xiaodong Yud , Bo Wue , Chao Yinf College of Mechanical and Power Engineering, Harbin University of Science and Technology Harbin Heilongjiang150080, China asjp566@hrbust.edu.cn, btianhailanlan123@163.com, chlgxxq@163.com, dhustyuxiaodong@163.com, ewbdoctor@sina.com, f115670521@163.com Keywords: Horizontal boring lathe; Hydrostatic center rack; Temperature field; Numerical simulation.
Firstly, physical model and Material Properties and boundary conditions are defined in ANSYS CFX-Pre software.
So the revolving speed is the important factor affecting the oil temperature.
References [1] Yanqin Zhang, Junpeng Shao, Shiqian Ni, Numerical Simulation of Temperature Field in Large Size Hydrostatic Bearings, China Mechanical Engineering, 2006, pp.563-565

Introduction Due to the excellent mechanical properties of Ti-6Al-4V, such as low density, high strength, excellent corrosion resistance, and workability, this alloy is utilized in many industrial applications such as the aerospace industry, medical applications, power stations, and chemical plants [1,2].
For optimal THT application, it is significant to have reliable information regarding hydrogen uptake and solubility and determine the appropriate temperature for hydrogen absorption and its effect on the mechanical properties of Ti-6Al-4V [10-14].
The main factors include the size of the grain boundaries, microstructure type, vacancies concentration, and crystal lattice type.
In contrast, the secondary factors include the impurities quantity, alloying elements quantity, and metastable phases in the alloy [14,17].
Activation energies Q and preexponential factors Do at different temperatures (T) for various microstructures of Ti-6Al-4V Structure Type Qα at low T.

Amylose and amylopectin, two different polymers, have the same basic structure, but differ in their length and degree of branching, which ultimately affects the physicochemical properties of these polymers[3].
The branched structure is of considerable importance as it influences the rheology and mechanical properties of the mineral binder systems.
AFM was used to extract the surface properties of the specimens.
The relationship between microstructure modified by amylopectin in glutinous rice porridge and mechanical properties of cement pasts will be the subject of further research.
Wang, et al, Effect of gamma irradiation on starch viscosity and physicochemical properties of different rice, Radiat.

Mechanical characterisation of braided composites using micromechanics methods for a unit cell of the braid have been extensively investigated and can provide a good prediction of elastic properties [1]; however, prediction of progressive damage and failure modelling is still an area of active research.
Alternatively, a much larger subset, 45x45 pixels, was used for [±45°]2S laminates which had the effect of improving point recognition without affecting the sensitivity in local strain variation.
These two factors most likely explain the fibre dominated linear elastic failure mode observed experimentally.
Digital image correlation provides a powerful method to fully understand strain distribution in the specimen during loading and obtain mechanical properties required for model calibration.
Standard test method for compressive properties of polymer matrix composite materials with unsupported gauge section by shear loading.

The affected area from the free face is 10m in the north slope and about 4m in east slope.
The numerical modeling of slope for a long time after the construction is taken with the mechanical parameter of wet loess(Table 1).
The slope is unstabilized with the stability factor of the whole slope is 0.69.
Once the landslide occurred, the building is unsafe and cause losses of life and property.
Excavation disturbance and its influential factors on material-yard slope of guandi hydropower station in Yalong River.

Study on Mechanical Property of Reinforced Concrete (RC) Beams under Sea Water Xikang Yan 1,2,a, Xiangshang Chen1,2,b and Pei Chen 1,2 1 School of Engineering,Hebei University of Technology,China 2 Civil Engineering Technology Research Center of Hebei,China a tjsyxk@126.com, bcxs0928@sina.com Keywords: reinforced concrete, beam, sea water corrosion, bearing capacity Abstract.
In this experimental result, the law for the change of mechanical performance of RC beams with different mix proportions under different dry-wet cycle conditions was investigated through artificially imitated sea water corrosion on the in-site casting RC beams especially on the concrete structure in the wave splash area.
According to relevant research result, it is possible to simulate the real eroding situation affected by natural environment with the aid of seawater spraying test.
Corroded Expansion Force of Reinforced Concrete Members and Its Influence Factors.

Statistics show that the noises by cars even have accounted for 85% of the city noise, noises have become one of the important sources of pollution of environment and seriously affect the living environment of human beings.
As a result, the noises of the vane pump have two parts with mechanical and fluid noise.
According to the requirements of vane pump low noise stator curve should have good mechanical properties and no vibration effect, at the same time, should make the flow pulsation as small as possible.
(4) The stator curve is widely regarded as a key factor in the study of the automotive steering vane pump noise.
Stator curve characteristics of blade and collision are important reasons of mechanical noise

Radiation Induced Effects on Properties of Semiconducting Nanomaterials S.K.
Irradiation effect can change the morphology of the materials in a controlled manner and tailor their mechanical, structural, optical and electrical properties.
Thus, harnessing irradiation as a tool for improving the properties of nanomaterials, requires full understanding of the defect production in nanoscale systems under irradiation, damage accumulation and annealing, as well as the knowledge of how the defects affect the material properties.
Ion implantation is a crucial method for dopant incorporation that produces lattice disorder which is an important factor affecting the device performance.
Moreover, under certain conditions, the disorderliness and crystallinity of the material is changed on account of its irradiation with particular energy beam which in turn may affect the size of the particle and related material properties.

Generated heat in NiTi wire depends on various factors such as length and diameter of materials, resistivity, and the properties of given electrical current.
Austenite phase formed the basis for the properties of Super Elasticity (SE) ​​on SMAs, while the martensite phase will produce Behavioral Shape Memory Effect (SME).
The variation of electrics power affect to the temperature change of SM495 NiTi wire.
Bruncko, Microstructure and properties of NiTi and CuAlNi shape memory alloys. (2004:2) [3] Claude G.
II: Mechanical Behavior and Scaling,”ASCE Journal of Engineering Mechanics, 133(9), 1019-1029. (2007) [5] Filipo Morra, Rezia Molfino, Francesco Cepolina, Miniature-gripping device.