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The axial compression ratio has greatly influence on the joint mechanical properties [2-5].
Using finite element method to analysis and discussion the mechanical properties this two kinds of joints, such as the bearing capacity, energy dissipation capacity and stiffness of joint.
Table 1 Geometry size of sections Name of components Size of section /mm Wall thickness /mm steel cylindrical column 120×120 2.5 steel cylindrical beam 100×100 2.0 C steel beam 180×60 2.0 Hysteric property analyses.
Especially for welded joints; the axial compression ratio is an important factor that affect the seismic performance of joints, the higher of axial compression ratio, the poor of ductility.
But the yield platform of QJ joint is much shorter than the GQJ joint; As the increasing of axial compression ratio, the yield load and ultimate load decreased significantly, it showed that the axial compression ratio had great effect to bearing capacity of joints, especially to QJ. (2) Before the point of elastic limit, deformation of the joints basically present elastic properties; As the increasing of load, the skeleton curve began to bend, enter the elastic-plastic deformation stage, the load increaseing lag behind the deformation, the stiffness of specimen reduce faster.

Initially, under the assumption of initial isotropy and totally incompressible of the hydrogenated nitrile butadiene rubber, the deformable sealing properties are analyzed using Yeoh-Revised and Yeoh models.
Subsequently, the high pressure and high temperature test verifies that the material strength properties are the prerequisites to achieve a stable and reliable seal.
Additionally, external factors, such as large outside temperatures and internal Mises stresses, can accelerate the ageing process of CPRC, which may potentially result in structural damage [24, 25].
Sealing properties and structure optimization of packer rubber under high pressure and high temperature.
Analysis of failure factors and countermeasures of casing packer during completion testing.

There are two primary environmental factors that affect the design of subsea X-tree system: the high external and internal pressure, extremely cold temperatures of the deep-sea environment and high product temperature.
The severity of accidents should be evaluated at least from five aspects: Harm to workers and the public; Damage to environment; Loss of property; Business interruption; Loss of reputation.
Both the X-tree control system and the X-tree mechanical system have exhibited remarkable reliability.
However, the reliability analysis work becomes complex refers to the mechanical and seal systems.
The ability to detect problems remotely is a critical factor in the implementation while the direct observation is no possible.

Because the chemical properties of nitrogen and carbon dioxide is very stable, and we can buy liquid nitrogen or carbon dioxide from related ways, the most important thing is that can be stored in liquid form in daily circumstances.
Comprehensive above factors,we choose carbon dioxide as a gas medium.
Beijing: Mechanical industry press, 2010.
Mechanical principle [M].
Chemical property data Handbook [M].

It is not affected by total salinity in injection water.
In 1968, an investigation of factors influencing ball sealer performance presented guidelines on how to apply ball sealers for optimum seating efficiency [11].
Li X. and Chen Z. [18] presented an integrated transport model, describing the relationships among the ball sealer transport sealing behavior, wellbore deviation, wall effect, perforation density and size, fluid properties, and pumping rate.
The factors affecting the blocking effect are analyzed.
Factors influencing optimum ball sealer performance.

Forming conditions such as material properties, friction and lubrication, cooling effect, punch speed, and the initial temperature of die and workpiece, etc., which affect to filling capacity and forgeability, are needed to be carefully reviewed [2,3].
Parameters Die Workpiece Materials Friction factor Initial temperature (◦C) Punch speed [mm/s] Heat capacity (N/mm2/K ) Conductivity coefficient (N/s/K) Heat transfer coefficient to the environment (N/s/mm/K) Mesh number H13 0.2 200 Variant 3.676 28.4 ─ 6000 6061 ─ Variant ─ 2.8 240 0.007 4000 Table 1 Input data for finite element analysis [4] Results and discussion Influence of forming temperature.
Kobayashi: International Journal of Mechanical Sciences.
Kobayashi: International Journal of Mechanical Sciences.

However, the resulting liquors contained sulfates, which might negatively affect the service life of equipment; for this reason, 2% NaOH solution was chosen for further leaching of fluorine from spent carbon parts of lining.
It was estimated at 31.2 g/m3 by X-ray fluorescence testing herein, which might negatively affect the service life of equipment should these liquors go into further recycling.
However, the resulting liquors contained sulfates, which might negatively affect the operation of equipment; for this reason, 2% NaOH solution is the reagent of choice for leaching F- from carbon SPL.
To intensify the process, the authors plan to further experimentally investigate the effects of various factors (solid-to-liquid ratio, process temperature, etc.) to improve solvent extraction of fluorine.
Li, Study of microstructure and mechanical property heterogeneity throughout the wall thickness of high strength aluminum alloy thick-wall pipe, J. of Materials. 34 (2019) 2736-2745

Shi Mechanical Engineering Department, Zhongyuan Institute of Technology, 450007, China Keywords: CBN grinding wheel, Spindle pivot, Emery wheel dressing Abstract.
The dust and the off-flavor produced by the resin corundum wheel during grinding affect the health of the operating-workers.
The grinding quality is affected by the property of the abrasive directly.
Considering such factors as the material of work piece, abrasive, particle size and grinding method synthetically, the 100% density is adopted, and the hardness of the wheel is between J and K (softness 3 to medium).
Fig.2 CBN grinding wheel Journal Title and Volume Number (to be inserted by the publisher) 309 The Dressing Method of the CBN Wheels During grinding of the CBN wheel, the abrasive particle in the working surface will gradually become blunt because of the influence factors, such as, the grinding force, the high temperature and the cementation in the grinding area, and at the same time, the original geometrical sizes of the wheel’s working surface may not be kept owing to the non-uniform wearing.

It is not difficult to see from above influence factors that the sizes of δ- phase is the most significant.
(a) (b) (c) (d) Fig. 3 Schematic of peritectic reaction in continuous casting slabs (a) shape of solid-liquid interface and distributions of carbon atoms (b) peritectic reaction (c) formation of the micropores (d) granulation of γ- phase Effects of δ→γ Phase Transformation on the Crack Formation of Continuous Casting Slabs The formation of micropores mentioned above is the result of the phase transformation shrinkage during the δ→γ phase transformation at high temperature, generating the great influence on mechanical behavior under high temperature of steel.
However, the micropores formed under high temperature will not obviously affect the room mechanical properties of steel, because these micropores will be vanished under the squeezing action of bulging force caused by the expansion appearance during γ→α phase transformation at lower temperature.
At high temperature region, the plasticity of γ- phase is relatively high because the micropores formed by γ→δ phase transformation do not influence obviously on the mechanical properties of the steel.

And even in presence of high signal-to-noise ratios, the factors influencing their properties are multiple, e.g. presence and type of lubrication, temperature, load, defect (presence, size, position, type).
amplitude, rms, energy) to more sophisticated analyses (AR models, statistical properties, wavelet transform).
The absence of a couplant and the vinylic glue have produced, in presence of an almost constant input signal, a spread of results which is not acceptable but even wax, grease and cyno-acrylic glue are affected by some variability.
Lim: Mechanical Systems and Signal Processing, Vol. 21 (2007), p. 1115
Mba: Mechanical Systems and Signal Processing, Vol. 18 (2004), p. 849