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This is caused by their excellent relationship weight/mechanical properties.
In this respect, composite materials give response to the requirements previously exposed, due to, principally, to the good existing relationship between its weight and its physicochemical, mainly mechanical, properties.
Carbon particles are very abrasive and they can affect negatively to the tool life.
Loss of coating provokes a decrease of the tool properties, originating decreasing surface quality decrease inside the holes, giving rise to form deviations and increasing the design deviation by delamination, Fig. 6.
International Journal of Mechanical Sciences 49. 983-988. 2007

Compatible mechanical properties were achieved at welded joint.
In this study, tempering heat treatment was suggested to obtain positive mechanical properties.
(a) M23C6, (b) SAD pattern of M23C6, (c) TiN, (d) SAD pattern of TiN Effect of Tempering on Mechanical Properties.
The effects of tempering on the steel mechanical properties were also tested, shown in Fig. 3.
(a) yield and tensile strength; (b) AKv-40℃ Performance of the E550 Steel Plate Mechanical Properties.

The (S/N) response analysis and Pareto analysis of variance (ANOVA) are used to identify the most significant parameters affecting the surface roughness.
The factors and levels are specified in Table 1.
The feed rate and the depth of cut are also significant machining parameters affecting surface roughness.
Consequently, this would reduce the cutting forces, which is required for better surface roughness as well as to preserve material properties against residual stress and change in micro hardness at the subsurface.
Ceramic and Glass Materials: Structure, Properties and Processing. (2008), Springer. p. 158

Introduction Mine water inrush is one of the main factors which affects and threatens safety in the coal production, the disasters by mining over confined water make up about one half of all the mine water disasters, and safety that menaced by high pressure water is getting more worse in deep coal mine.
First, changes in pore pressure cause changes in effective stress, which affect the response of the solid, for example, a reduction in effective stress may induce plastic yield; Second, the fluid in a zone reacts to mechanical volume changes by a change in pore pressure.
The existing research results show that[2], the error caused by uncertain factors such as the width of fracture, distance of fracture and filling only affect on the values of main permeability tensor,can’t affect the direction of permeability tensor.
Fig.6 The contour of pore pressure when Fig.7 The contour of pore pressure when the workface was 150m apart from the fault the workface was 30m apart from the fault Conclusions (1)The permeability tensor of rock has important significance for researching permeability, and we can convert the permeability of discontinuous fractured rock mass to continuum anisotropic model by using it’s properties.
(3)The theory of coupling fluid-solid with FLAC3D can be used for numerical simulation of water inrush through coal seam floor nicely,the anisotropic permeability model can also simulate the floor rock the nonhomogeneous anisotropic permeability properties primely.

Make numerical analysis on 9 programs in Table 2, by referring to the influencing factors shown in Table 1.
The impacting sensitivity of construction parameters on the efficiency of construction can be ranked as follow: C, D, A, and B. the heading pre-reinforcement pattern outside contour is the most important affecting factor on the efficiency of construction.
(2) Results from overall balance method: Excavating step length (D) is the most important factor influencing on heading displacement, and the more important factor affecting on the efficiency of construction, and the effect trend of both factors is consistent, thus being considered as an index to evaluate the heading displacement and construction efficiency, namely D3 (1.8m).
The pre-reinforcement pattern outside the contour (C) is the most important factor affecting the efficiency of construction, and the secondary important factor affecting the heading displacement, thus being considered as the index of efficiency of construction, C2 (small pipe shed).
(2) the paper concludes the sequence of construction parameters sensitivity on the force on wall rock by analyzing sensitivity of factors on the construction parameter: arch advanced supporting pattern, footage driving cycle , heading pre-reinforcement length, heading pre-reinforcement density; the arch advanced support pattern is the most important factor affecting the efficiency of construction, footage driving cycle is the most important factor influencing the vertical displacement of heading

The hull shape and main dimensions of the deck barge as well as the mechanical properties of the material are listed in Table 1, Table 2 and for further visualization, Figure 2 serta Figure 3.
Mechanical properties material Pole Data Size Unit Plate thickness 4 - 26 mm Yield strength 235 MPa Tensile strength 400-520 MPa elongation 22 % Fig. 2.
Scantling of profile and plate dimensions and the mechanical properties of the material are applied according to the working drawings to provide actual conditions in the field.
Corrosive environmental factors also affect the equivalent stress value in the deck barge model, represented by the reduction plate.
Lu, “Mechanical properties analysis of the naval ship similar model with an integrated sandwich composite superstructure,” Ocean Eng., vol. 232, no. 109101, 2021, [Online].

The mechanism and process parameters affecting PAR have been deeply investigated.
W∞ should be equal to the amount of added P without considering the loss of P that caused by other factors such as burning.
The mechanism of modification temperature affecting λ is that the AlP particles are less likely to segregate or attach to the surface of the crucible wall or inclusions in the melt with higher temperatures.
Effects of rare earth Er addition on microstructure and mechanical properties of hypereutectic Al-20% Si alloy [J], Mater.
Influences of complex modification of P and RE on microstructure and mechanical properties of hypereutectic Al-20Si alloy [J], Trans.

To improve response factors such as material removal rate (MRR), surface roughness (Ra), and tool wear rate (TWR), Taguchi's L9 orthogonal array approach is utilised to design the trials and study the effects of different process parameters.
The method' performance is determined by input factors such as spark gap, gap voltage, current, dielectric utilised, and electrode and workpiece material[8,9].
Discharge initiation, plasma expansion, material erosion, debris removal, and discharge channel reconditioning in EDM are all influenced by the dielectric fluid's electrical, mechanical, and thermal properties.
Table 1: Input factors and their levels Input Factor Parameter level Current(I) 12,15,18 [A] Pulse on Time (Ton) 200,350,500 [µ sec] Pulse off Time (Toff) 65,100,135 [µ sec] Gap Voltage (V) 45 [V] Dielectric Medium Air Air pressure 4 [bar] Output Factors: ● MRR= π4D2 H/T …(Eq. 1) D=Top diameter of the hole(Workpiece) H=actual depth of the hole(depth of the hole -electrode wear(Workpiece)) T=Time taken by the trial ● EWR=π4D2 H/T …(Eq. 2) D=Top diameter of the Electrode H= Electrode wear height T=Time taken by the trial Fig.1: Tool electrode  Fig.2: Workpiece Table 2: Hastelloy Bar Chemical Compositions Grade C Mn Si Co P Fe Mo Ni Cr S W V Hastelloy C276 0.010 Max 1 Max 0.08 Max 2.5 Max 0.04 Max 4 -7 15-17 Bal 14.5-16.5 0.03 Max 3-4.5 0.35 Max Table 3: Thermal and physical properties of workpiece, tool and dielectric Element Specific Heat [J/g K] Melting point [K] Thermal conductivity [W/m K] Density
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering. 2017;231(3):497-512. doi:10.1177/0954408915611540

SWOT analysis of the drilling process Systemic Analysis of the Drilling Process In order to highlight the parameters of technological interest, the factors able to affect the values of parameters of technological interest ​​and the correlations among the input and output factors of the drilling process, the method of systemic analysis could be used.
As drilling process input factors, one can take into account: Cutting parameters; Tool geometrical characteristics and, respectively, the characteristics of drilling tool material; Workpiece material properties; Characteristics of machining equipment; Type and properties of cutting liquid.
The factors that can disturb the drilling process of drilling could be: Vibrations; Possible variation of workpiece material properties etc.
In case of Ishikawa diagram from figure 4, as factors able to affect the productivity of drilling process, one took into consideration: Fig. 5.
Sharpening a drill on Proxxon type equipment - Cutting parameters (depth of cut, axial feed, cutting speed); - The type and properties of drilling tool active zone (mechanical properties, wear resistance, corrosion resistance etc.); - Geometrical characteristics of drilling tool active zone (sizes of clearance angle, back-rake angle, size of transversal edge etc.); - Dynamic and kinematic characteristics of machining equipment (sets of rotation speeds, axial feeds, power of electrical motors, rigidity of technological system etc.); - Type, properties and ways of cutting liquid circulation in the machining zone.

These properties make the study of SHS of great difficulty.
Some factors such as the particle size of reactants, the relative density of the media, the quantities of additives directly alter the way and velocity of combustion wave, which affects the combustion temperature, making the phase formation and properties of the product different.
Finally, Large amounts of gas can’t escape and eventually leave in the ceramic, leading to a large number of pores, which greatly affect the mechanical properties of ceramics.
From the point of density, the ceramics of the third system were of good properties compared with the others.
[11] Zhongmin Zhao, etal: Prepared by SHS Gravitational Separation lined steel ceramic coating microstructure and properties ,edited by Mechanical Engineering Materials. 1998,22 (2): 34.37.