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It is due to their admirable material properties such as high strength, high hardness, high melting temperature, low density, high chemical inertness, and biocompatibility [1].
Surface quality such as tensile stress, strain, intensity, stiffness, and residual stress can also be affected by the formation of recast layer.
Experiment and Measurement The experiment was designed using general factorial of two factors with four levels (42) statistical model, where the two controlled parameters were gap voltage and rotational speed.
The value of Prob > F less than 0.05 indicates the factors n, n2, n3, v, nv are significant
Lee, Mechanical properties and wear behaviour of the white layer, Tribol.

This paper is dedicated to on the basis of previous, study on relationship between bolt shape and bolt properties.
Under the same conditions of surrounding rock and resin anchoring agent, the main factors influencing the anchor performance is the bond strength between resin anchoring agent and bolt rod [4].
The three main factors of cohesive force have a great relationship with the anchor shape and the surface condition [5].
Therefore, the bolt shape directly affects the anchor performance.
The main factors influence the bolt shape include if there are ribs, the rib type, the rib height and the rib spacing and so on [6][7].

Although some attempts have been made to develop machining models to simulate the surface topography of a machined surface, most have failed to take into account the effect of various factors such as tool geometry, the synchronization of the machine tool path with the vibration motion of the FTS, the dynamic condition of the cutting systems, the cutting mechanics, and material science.
Surface Generation in Fast Tool Servo Machining As shown in Fig. 1, the material removal process in FTS machining is not only governed by the cutting tool, machine design, the band width and stroke of the FTS, the synchronization of the cutting tool vibration with the spindle rotation (see Fig. 2), and cutting conditions; but also critically affected by the properties of materials, the tool geometry, and the geometry of the optical microstructures that are being cut.
The surface topography model takes into account the cutting mechanics, material factors, kinematics, and dynamic characteristics of the cutting processes.
Lee: Proceedings of The Institute of Mechanical Engineers, Part B, Journal of Engineering Manufacture, Vol.214 (2000) No.B6, pp.463-480
Lee: JSME International Journal-Series C: Mechanical Systems, Machine Elements and Manufacturing, Vol. 43 (2000) No.1, pp.116-126.

Owing to these excellent properties, BMG has received considerable attention as a structural material, especially for small or micromachine components.
The mechanical properties of BMG have been widely studied; however, the fatigue mechanisms and mechanics still remain unclear.
The relation is slightly affected by the method to measure the crack closure.
The crack propagation direction may also be affected by the residual stress.
The residual stress parallel to the crack may affect the crack propagation direction.

Experts and scholars had carried out lots of research and achieved certain results in different fields, such as the cutting mechanism of composite materials, the design of material and structure of tool, special processing technology, factors that affect surface quality.
Influence of cutting process on the properties of the composite materials is the most significant content in the study of machining technology of composite materials [1].
Nowadays, carbon fiber reinforced plastic(CFRP) materials its application in the large aircraft of China's aerospace field and defense fighters and weapons because of its superior characteristic such as high specific strength and specific modulus and properties such as being designed and easy to integral shape in various kinds of composite materials.
At present, the methods of machining are still the traditional mechanical processing.
It is composited by carbon fiber as the reinforcement and resin as the matrix, and has a lightweight, high strength, high temperature resistance, corrosion resistance, excellent thermodynamic properties and other characteristics.

Studies suggest another approach for the improvement and development of new dental ceramics, since the crystalline phase is not the only important factor in determining the mechanical properties and especially slow crack growth susceptibility.
Changes in the glassy matrix composition of veneering materials can result in better mechanical properties and greater resistance to slow crack propagation [21, 39].
Green, An introduction to the mechanical properties of ceramics.
Wachtman Jr, Mechanical properties of ceramics.
Rowcliffe, Evaluation of mechanical properties of dental ceramic core materials in combination with porcelains.

According to Kurt et, al., packing pressure and mold temperature among the most influential factors when it comes to optimizing shrinkage and roundness [3].
On the other hand, changing the holding pressure does not affect the dimensional stability by a huge margin.
This result contradicts with the known theory, and it might be affected by the material’s maximum shrinkage limit.
Grochowicz, "Analysis of Selected Properties of Injection Moulded Sustainable Biocomposites from Poly(butylene succinate) and Wheat Bran," (in eng), Materials (Basel), vol. 14, no. 22, Nov 20 2021, doi: 10.3390/ma14227049
Sykutera, "Post-Processing Time Dependence of Shrinkage and Mechanical Properties of Injection-Molded Polypropylene," (in eng), Materials (Basel), vol. 14, no. 1, Dec 23 2020, doi: 10.3390/ma14010022

Investigation of Subsurface Damage Depth of Single Crystal Silicon in Electroplated Wire Saw Slicing Yufei Gao a, Peiqi Ge b and Shaojie Li 1 1 School of Mechanical Engineering, Shandong University, Jinan, China, 250061 a deargyf@sina.com, bpqge@sdu.edu.cn Keywords: Wire saw, Single crystal silicon, Subsurface damage depth, Surface roughness Abstract.
Wafer slicing process is a key technology, and the SSD generating in slicing can directly affect the workloads and costs of next working procedures.
(a) Vs＝2 m/s, Vw＝2.5µm /s (b) Vs＝1.5m/s, Vw＝12.5µm /s Fig.3 SEM micrographs of single crystal silicon surface (a) Indentation crack system induced only by normal load [5] (b) Cutting crack system induced both by normal load and tangential load Fig.4 Crack systems under a single abrasive The maximal propagation depth of median cracks affects the SSD depth directly.
In this case, median crack length and initiation direction will be affected by the tangential load.
Fig.5 Relationships of η vs ε and γ Fig.6 Relationship between SSD depth and SR The mechanical properties of single crystal silicon are E=187GPa，H=10GPa，KC=0.82MPa·m1/2.

The levels of factors are chosen according to the literature [9].
The sign of coefficient present the related factors influence the response.
According to the experimentally obtained results, it is understood that the 3 factors are affect to tool life of the cutting tool and MQL minimum.
It's shown the inverse relation between 2 factors as the feed rate (feed) and the cutting speed (speed).
Journal of mechanical engineering 6 (2009) : 85-102

The coal seam is not affected by mining.
The factors that afect coal permeability’s change can be divided into two categories [7]: One is the thermodynamic parameters of coal seam methane, in this fact coal seam gas pressure is most important, some experiments shows that when gas pressure P <1 MPa is strictly klinkenberg effect, with the declining of gas pressure, coal permeability increasing. 
The second is the change of skeleton structure of coal, once the coal skeleton changes, the permeability of the coal seam will have a significant change After drilling in the coal seam, regeneration stress arising from Re-distribution of stress around the drilling,and the regeneration stress affect the permeability of coal directly. 
Figure 1 Gas flow of borehole,coal seam permeability coefficient (two algorithms) curve The eighth day , permeability coefficient drop suddenly may be due to gas emission from the coal seam which is outside distressed zone, it is no longer affected by pressure relief so the permeability coefficient is low. after the ninth day the permeability coefficient is low and in a small range to keep floating up and down no longer have a big change, this may be because the gas pressure and skeleton structure of coal outside the pressure relief area unchanged, so significant change of the permeability will not happen, but it is not a constant value also,it floating up and down in a small range . may be coal permeability around the drilling is controled by space, time, secondary stress, gas pressure and coal physical and mechanical properties , is a variable, can not be steady.It floating in a stable and small range ,this stable range may be the original coal seam permeability coefficient.