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Thin metal films are prone to residual stress which is developed during thin film formation and growth and influenced by external factors.
Instead of observing its electrical properties, it also becomes necessary to study its morphology and residual stress since they will affect the functional properties.
Lee, et al. who studied the mechanical properties of Al/AlN multilayer thin films, reported that measurement result on residual stress showed Al layers were subjected to compressive stress which was induced by the interface which caused overall increase of the compressive stress in the multilayer thin films [7].
Mechanical Properties of Thin Films and Multilayers.
Mechanical and Adhesion Properties of Al/AlN Multilayered Thin Films.

Study on Simulation Processing and Engineering Experiment of Spinneret Hole Bottom based on Material and Mechanics Properties with Different Transition Angles Qiancheng Zhao, Na Shi, Chongchang Yang * Engineering Research Center of Advanced Textile Machinery, Ministry of Education, Shanghai, 201620, P.
China College of Mechanical Engineering, Donghua University, Shanghai, 200051, P.
Its high precision is the key factor to both the quality of fiber and a good spinning process. [1]The shape of the transition angle of spinneret hole bottom has an important influence on the spinning extrusion grew phenomenon.
Consider a combination of factors, this speed is the optimal parameters in the automatic processing. Ⅳ.
(in Chinese) [3] Chen Jian, Shen Xing dong.”Study on Machinability of stainless steel”.Electrical and mechanical product development and innovation. 2004(7).

Influencing Factors on Coal gangue Hills Explosion The explosion of the coal gangue hill is caused by various factors, including the internal factors and the external factors [3,4].
The internal factors mainly contains: the degree and area of spontaneous combustion of the coal gangue hill; the content of residual coal in the coal gangue, the metamorphic degree of the coal gangue, and the coal macerals; the aggregation states and types of sulfide in the coal gangue; the porosity of the coal gangue hill; mechanical properties, fragmentation and weathering of the coal gangue.
Conclusions The explosion of spontaneous combustion of the coal gangue hill is caused by various factors, including the internal factors and the external factors (such as environment and climate conditions).
Zhang, Blasting law and inducing factors of self-combustion waste heap, J.
Li, Analysis of gangue hill spontaneous combustion and its affecting factors, J.

Therefore, further enhancing the properties of the incremental digital valve is more conductive to expand its application fields in high-performance hydraulic equipments [1, 2].
The mechanical equilibrium equation is， (7).
Fig.7 The control block diagram According to the system of differential and parallel digital valve, the relative factors affecting the frequency response of differential parallel valve are confirmed, and among these the performance of motors, the servo rotation mechanism and the valve structure are the key factors.
The mathematical model of novel digital valve’s servo-screw mechanism is built, the key factors affecting the dynamic characteristic of digital valve is obtained, which supplies references for component design.
LI, The 2D electro-hydraulic digital directional valve, Chinese Journal of Mechanical Engineering. 3 (2000) 86-89

In sheet metal forming, the yielding and work hardening behavior of sheet metals are one of the most influential factors that affect the formability, stiffness, and crushability of the formed parts.
The mechanical properties obtained from uniaxial tensile tests in the RD of the materials are listed in Table 1.
Table 1 Mechanical properties of the test materials Material Thickness [mm] YS [MPa] TS [MPa] EL [%] IF steel 1.6 150 286 54 980 DP steel 1.6 730 1051 14 Experimental apparatus.
The SD effect is not affected by the strain path change.
Tanabe, The Bauschingar effect and its role in mechanical anisotropy, J.

The article describes selected and carried out tests of mechanical properties of PLA plastics extruded in different directions in this case carried out vertically by FDM rapid prototyping method of two PLA materials such as pure without additives blended with blue dye.
In order to transform the starch material properties corresponding to plastic from petroleum, it must be exposed to high temperatures and by isolation we get glucose from it.
Fig. 2 Production of samples vertically in the Repetier-Host software Experimental Test for Determining the Tensile Properties Experimental test of the tensile properties of PLA plastic test samples was carried out in accordance with the standard EN ISO 527 on testing machine Tira-test 2300 in the laboratory of mechanical and technological tests.
Pandová, Progressive technology diagnostic and factors affecting to machinability, Applied Mechanics and Materials 616 (2014) 183-190
Spišák, Assessment of properties thermal sprayed coatings realised using cermet blend powder, Metalurgija 53/4 (2014) 661-664

Introduction In recent years, tungsten carbide (WC) and its composites (WC-Co) are used widely in the manufacturing industry due to its unique mechanical properties [1].
However, these properties also contribute to the difficulty in machining, restraining the selections of machining methods for that material.
Table 1: Machining parameters Deionized water resistivity [MΩ cm] 0.5 Voltage [V] 60 Resistor [Ω] 156 Capacitor [pF] 265 Frequency [kHz] 100, 300, 500 Duty cycle [%] 0, 50 Tool rotation [rpm] 500 Feedrate [µm/s] 0.2, 5.0 In micro-EDM, a material with low tool wear ratio is usually preferred as too much electrode wear can affect the machining accuracy significantly.
This shows that feedrate is one of the key factors that affect the extent of electrolytic dissolution, hence it has a significant effect on the machining accuracy and also the surface finishing of the holes in micro-EDM with deionized water.
Duty cycle and feedrate have been identified to be the main factors affecting the machining gap and machining quality of holes.

., the possibility of measuring the elastic modulus as a function of the processes proceeding in a specimen and affecting the structure of a polymeric material (aging, sorption, and desorption of liquid media and vapors by the material, temperature variations, etc.).
The initial information for development of the plan is the number of factors n and the number of experiments k.
The points of experiments in the domain of factors are distributed as regularly as possible (Fig. 2).
The elastic properties of the material were modeled by Hooke’s relations.
The method allows one to use the "principle of a unified specimen", i.e., the possibility of measuring the elastic modulus as a function of various processes affecting the structure and properties of a polymeric material (aging, action of temperature and moisture, etc.).

The special properties of these alloys make machining them extremely difficult.
Shelar et al. [14] has examined the influence of machining parameters—cutting speed, feed rate, and depth of cut—on crucial output factors such as surface roughness, material removal rate, and dimensional accuracy.
Microhardness measurements and nano-indentations were employed to assess the mechanical properties and understand their impact on micro-milling.
Wear mechanisms involve adhesion and oxidation, with TiAlSiN coating demonstrating superior mechanical properties and oxidation resistance, leading to improved cutting performance.
· Examining the impact of machining on the surface integrity of titanium alloy components, including residual stresses, to ensure the desired material properties are maintained

This work provides the basis for further research on the influence factor of sniper rifle firing accuracy.
The material model of bullet is bilinear model, related mechanical performance parameters are shown in Table 1.
Table 1 Parameter of mechanical properties material density （kg/m3） Young’s modulus Poisson’s ratio σs（Mpa） σb（Mpa） steel 7.85×103 206000 0.29 810 - copper 8.73×103 108000 0.35 160 620 lead 11.34×103 17000 0.42 11.3 16.5 Contact and boundary conditions.
The bend deformation of tube due to gravity is bound to affect the bullet motion in the tube.
These results could be used as the reference for simulation study of sniper rifle, which is helpful to raise awareness of firing accuracy influencing factors.