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During the operation the properties of the insulating materials gets change: the electric resistance, heat-conducting properties and other properties decrease [13].
Research of time-history properties of materials of cable wares work is sanctified to [14].
Results over of experimental researches of correlation between the dangerous factors of self-ignition of materials in apartments are brought in-process [23, 24].
Boss et al, Thermal and Mechanical Properties of Blends Containing PP and Recycled XLPE Cable Waste, J Polym Environ, 27 (2019) 386–394
Sobkowicz, Review of polymers for heat exchanger applications: Factors concerning thermal conductivity, Applied Thermal Engineering, 113 (2017) 1118-1127

In addition, the pulse frequency (the number of pulses per unit time) also affects the machining speed.
The layer will change the chemical composition, microstructure, mechanical properties of the processing surface, which also leads to a series of the negative impacts on the molding surface of a workpiece.
This would adversely affect the surface quality of the machined surface.
We should consider a couple of factors, such as materials of the workpieces and electrode, processing requirements, to determine the specific electrical parameters.
The Influence Factors of Machining Speed in EDM..

Particular importance is the piezoelectric device's performance, the properties effectively displayed in piezoelectric ceramic composites.
The parameters perturbation of fibers can be the precursor to degradation of electro-mechanical properties.
It is achieved by studying the perturbations in the resonant frequencies of the backscattered amplitude spectrum, and correlating these perturbations to changes in certain properties of the fibers.
Fig. 2 Distribution of *zu vs. θ for various ka with 5 , 10µmaγ= = o In the following analysis, we will show the influences of the perturbations of material parameters on the *zu , which can be used as the precursor to degradation of electro-mechanical properties of 1-3 piezoelectric composites.
The theoretical model developed here can be used in conjunction with experimental techniques for the non-destructive evaluation of piezoelectric fibers and on-line monitoring of the variations of mechanical properties of 1-3 connectivity piezoelectric composites.

Because of the special physical, chemical and optical properties, liquid crystal has widely been used in the light-thin display technology from the mid-twentieth century.
Influence of internal factors.
Influence of external factors.
It is generally believed that the solubility of supercritical CO2 fluid will be increased with the increment of the density of supercritical CO2 fluid, and the temperature and pressure are the main factors affecting the density of supercritical CO2 fluid.
The experimental results Number Pressure（MPa） Temperature（℃） Entrainer（%） Recovery（%） 1 8 35 3 60 2 10 40 3 70 3 12 45 4 78 4 14 50 4 82 5 16 55 5 90 6 18 60 5 83 From Table 2, it can be seen that the temperature, pressure and entrainer are the main factors affecting the recovery of the liquid crystal.

This includes the use of traditional composites, such as carbon and glass fiber, as it is advantageously reasonable strong in their mechanical properties and performance.
The reason behind it was due to the facts of its lightweight, combustible, degradable and combustible factors.
The reasons behind increasing in sound absorption of the materials were due to several factors, such as fiber loading, types of fibers and etc.
Riva Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and Wheat Straw Fibre Composites: Thermal, Mechanical Properties and Biodegradation Behavior.
Physical Parameters Affecting Acoustic Absorption Characteristics of Fibrous Materials.

Study on Calculation Theory of Elastic Flexural-torsional Buckling Bearing Capacity for Castellated Beams Xiangrong Chen 1, a, Hailong Yuan 1,b, Xing Chen1,c, Zhenwen Liu1,d 1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China email: acxr90@126.com, byzl8801@126.com, ccx0411@sina.com, dhippohappy@163.com Keywords: castellated beams; elastic flexural-torsional buckling; calculation theory; influence factors Abstract: The structure of castellated beams is complex, using the computation theory of elastic flexural-torsional buckling of H-shaped beams to study the elastic flexural-torsional buckling strength of castellated beams under different loads, based on simplifying the section's eigenvalues.
Introduction Castellated beams are made by cutting the I beams or H-shaped beams along the dog-leg path on the web and rejoining the two halves by welding, which are widely used in practical engineering as the superior mechanical properties and yield good economic returns.
Analysis of influence factors on the elastic flexural-torsional buckling of castellated beams 5 castellated beams were designed and analyzed by the ABAQUS software to text the effects that divergence ratio had on the elastic flexural-torsional buckling critical load, keeping span and distance- height ratio as fixed constants, just chang the divergence ratio.
13.126 133.459 2 1.4 420 200 8400 0.35 63.380 13.414 133.702 3 1.5 450 200 8400 0.35 64.853 13.728 142.082 4 1.6 480 200 8400 0.35 66.481 14.074 146.836 5 1.7 510 200 8400 0.35 68.114 14.418 151.368 It can be seen from Table 3,4 that the influence of distance-height ratio on the elastic flexural- torsional buckling bearing capacity of castellated beams is small, as the increment of distance-height ratio the change of the bearing capacity is less, however ,the influence that depth-span ratio dose is great, with the decrease of depthspan ratio the bearing capacity declines linearly, the divergence ratio also affects
Conclusions Conclusions are drawn from the research of calculation theory and finite element analysis： (1)The reduced calculation methods for section eigenvalues of castellated beams are of high accuracy and the calculation formulas are simple, which can be used to any hexagonal castellated beams, avoiding the computational difficulty brought by the complex structure.(2)After the simplified calculation for eigenvalues of castellated beams, the computation formulas of elastic flexural- torsional buckling bearing capacity for plain girders can be used to calculate the bearing capacity of castellated beams, which are simple and of high accuracy.(3)Through the analysis of affecting factors, it is concluded that depth-span ratio impacts the elastic flexural-torsional buckling bearing capacity of castellated beams greatly, the influence of divergence ratio is not obvious, the effect of distance- height ratio can be ignored.When designing, we should choose larger divergence ratio to increase

Introduction Soil has various properties, including elastoplasticity, dilatation, shear contraction, stickiness and so on.
Rheologicy is one obvious and important mechanical property of soft soil, so it must be taken into account when it comes to engineering in soft soil.
Viscoelasto-Plastic Model with Double Yield Surface A great number of tests show that Mechanical properties of saturated soft soil are very complex and it has elasticity, plasticity and viscosity.
The physical and mechanical properties of the foundation soil are shown in Table.1 and Table.2.
The model can affect the plastic properties, including dilatation and shear contraction and stickiness of soft soil comprehensively.

The influences of high energy ball-milling process factor on both the structural and magnetic properties of atomized alloy powders were studied.
Their structural and functional properties were analyzed.
Li, Influence of powder metallurgy process on mechanical properties of magnetic iron powder core, Materials Science and Engineering of Powder Metallurgy 16(2011) 558-562
Barinov, Magnetic properties of powders of Y-Co alloys prepared by mechanical grinding, Fizika Metallov I Metallovedenie 52(1981) 1184-1193
Lenoble, Microstructure and magnetic properties of nanostructured (Fe0.8Al0.2 )100-xSix alloy produced by mechanical alloying, Journal of Magnetism & Magnetic Materials 385(2015) 151-159

After a crack has initiated, Stress Intensity Factors (SIF) are obtained and the subsequent propagation is described following Paris law type equations (NASGRO).
This type of structures tends to behave as a simple metallic structure, but with added advantages of metal alloys and fibre-reinforced composites providing superior mechanical properties.
Explanations of the crack opening function, f, the threshold stress intensity factor, ∆Kth , and the critical stress intensity factor, Kc , are presented in the NASGRO Manual [9].
Material properties for fatigue crack initiation are obtained from [3] and propagation from [9].
The final effect is a reduced effective stress intensity factor (Keff), which has beneficial effects on fatigue crack growth.

The sintered samples were analysed in order to consider the properties of SS 316 L foam after sintering process.
The space holder particles have a low melting or dissociation point in stainless steel, which affects the foaming process and the resultant mechanical properties adversely.
Lastly, the sintering parameter also plays a serious factor to fabricate the proper SS 316 L foams.
[2] Nuray Bekoz, Enver Oktay, Mechanical properties of low alloy steel foams, Dependency on porosity and pore size, Materials Science & Engineering. 576 (2013) 82–90
[6] Li Yan, Guo Zhimeng, Hao Junjie, Ren Shubin, Porosity and mechanical properties of porous titanium fabricated by gelcasting, Rare metals. 27 (2008) 282-286