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Key characteristics such as flexibility, compatibility, high stability, and high sensitivity are critical factors that influence their performance [4].
Among these, TPU, a biocompatible block copolymer composed of soft segments (long polyethers) and hard segments (short sequences), stands out due to its excellent mechanical properties, such as flexibility, elasticity, and abrasion resistance [10].
However, TPU is inherently an electrical insulator, which poses limitations on its electrical properties [11].
The electromechanical properties of 3D-printed samples after ultrasonic cavitation-enabled treatment and thermal-assisted method.
Potiyaraj: 3D printable resin/carbon nanotube composites for wearable strain sensors: Enhancing mechanical and electrical properties, Journal of Science: Advanced Materials and Devices, https://doi.org /10.1016/j.jsamd.2023.100546 [12] I.

They will lead to the uneven of metal structure, and seriously affect the service characteristics and processing properties of the steel.
Insufflation, electromagnetism and mechanical agitation are three effective methods to promote the collision and aggregation of inclusions, and make the inclusions grow up.
Of the three factors, the most influential one, and the only one we can control is the radius of inclusions, because v is proportional to the square of r.
According to a lot of experimental dates and calculation, we revised the Stokes formula by adding a shape factor coefficient k as follows: (3) In Eq.(3): k=r1/r2, r1 means the radius of global with the same volume to the inclusion, r2 means the radius of global with the same density and rise speed.
(3) The range of shape factor coefficient k revised to Stokes formula is 1.5~2.8

As the welding process itself have the process characteristics such as a high heating temperature, fast heating, cooling, temperature gradient , it make the weld zone metals materials changed, resulting in making material mechanical properties changed to some extent.
Simulation The establishment of finite element model The actual welding condition is very complex, building exactly the same physical model is almost impossible, so we tend to neglect some secondary factors, making some assumptions.
Therefore, weak impact factors such as the temperature field, stress and strain field were weakened treatment [1-4].
Figure7 shows, under the material is heat affected zone of welding seam direction parallel, σx and σy in weld stress is decreased, σx amplitude decrement maximum.

Introduction Sand production is an important issue affecting oil production: it can cause serious problems in oil flow within sand reservoir and to proper functioning of the oil production equipments.
Ref[3]] investigated the mathematical modeling of the coupled mechanical-thermal-flow problem and established a corresponding finite element scheme.
Mechanical Model In order to investigate in detail the mechanical behaviour of rock mass around perforation tunnels which is rather small (0.5 inch only) compared to the depth of borehole, a slice of sandstone was taken as objective of this computation, which is 0.1524m-thick and 3m in radius.
A set of membrane elements were adopted in order to simulate the impermeable property of casing.
This indicates that decrease of perforation tunnel density can remarkably reduces the magnitude of maximum horizontal stress component which is the major factor of perforation tunnel instability.

When, the safety factor can be regardless under constant amplitude stress.
Thus, the equivalent stressunder variable amplitude stress can be expressed by: (5) Form the aforementioned equation of the equivalent stress, the strength criterion under variable amplitude stress can be expressed by: (6) whichis the safety factor during work andis the allowable safety factor.
(2) The fatigue strength of a wheel is affected by the effective stress concentration factor at the dangerous point and the size factor of the wheel markedly.
Journal of Mechanical Strength, Vol. 24(2002), p. 617-619 [2] H.C.
Liu: The Assay and Evaluation of Bending Fatigue Properties of Aluminum Alloy Wheel [J].

Introduction Polyurethane (PU) resins, due to their high performance, especially in abrasion resistance, chemical resistance and mechanical flexibility, are widely used in different areas such as coatings and adhesives for wood, textiles and automobiles[1,2].
PUA is a kind of excellent polymer materials, especially for coating and adhesive, due to their superior properties such as decorativity, protectiveness, and corrosion resistance.
PBA were charged into a dry vessel fitted with a reflux condenser and a mechanical stirrer.
Therefore the added amount of DMPA will affect the length of PU chain, and also determine the content of the ionic group.
Summary The viscosity of high solid content emulsions is sensitive to many factors.

Ultrasonic flow meters are affected by the temperature, density and viscosity of the flowing medium.
They are inexpensive to use and maintain because they do not use moving parts, unlike mechanical flow meters.
The calculation of the flow can use the factor correction function of the hardware multiplier in the TDC-GP1 chip.
By setting different multiplication factor can make the meter adapt liquid flow calculation of different tube diameters.
Mariano, “Toward understanding the fundamental mechanisms and properties of the thermal mass flow controller, ”Vac.

There are many steps to build the finite element model, such as draw the model, determine material properties, mesh generation and so on.
By current chopping control, the large peak value of current and flux linkage can be avoided and constant torque mechanical characteristics can be obtained.
The reason is higher speed can provide bigger input mechanical power, and the phase conduction period will be shorten.
It can be found that the change of capacitor will not affect the amplitude of the voltage, but with bigger capacitor, the rise time of bus voltage will be longger and the voltage ripple will be smaller.
In generating mode, the effects of several factors on bus voltage are simulated and the reasons are given as well.

Introduction As observed in many experiments, failures of metallic materials are very sensitive to the structure and properties of the surface, and in many cases they initiate from the material’s surface.
In order to eliminate the effects of surface roughness induced by the shot peening process, a 5 µm thick layer was removed from the surface by mechanical polishing, thus the measurement was actually initiated at about 5 µm from the surface.
The surface material was removed by controlled mechanical polishing, bringing a small force on the sample, using ultrafine abrasive paper and repeatedly moving with water cooling.
The change of defect configuration in the transition layer should be affected not only by treatment time but also by some immeasurable factors accompanying the energy dissipation process, for example, spontaneous temperature increase induced by the severe deformation process.

Introduction Gas turbines are required to operate under conditions of high temperature and mechanical loading.
Due to the frequent start-stop or the great load variation, the gas turbine rotor often bears the drastic changing of temperature and tremendous thermal stresses, plastic deformation will be occurred in local area, which leads to low-cycle fatigue damage, it will affect the safe operation of gas turbine[2-4].
The concentration of stress has enormous influence on fatigue strength, and it plays a leading role in all sorts of factors.It greatly reduces the component's fatigue strength [5,6].
Using a physics-based model, mechanical and thermal stress analyses are performed on the rotor.
The Theory of Rotor Fatigue Damage Fatigue properties of the rotor steel Rod is the key component of the rotor; the combined rotor is linked with the discs by different type rod as a whole.