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The main factors that may influence the degree of thinning were identified.
Experimental calculations were performed in Deform-3D with a variation of these factors.
Next, the main factors that could influence the degree of wall thinning were identified. 1.
The radius affects the thinning of the wall due to the fact that it directly affects the "braking" of the workpiece.
Accordingly, the "braking" of the workpiece is influenced more by its mechanical grip on the surface of the die than by the properties of contact of the workpiece with the tool.

The factors affecting surface quality of SEM include electrical characteristics, tool electrode properties, workpiece machining properties, dielectric properties (Parameters affecting of SEAM are shown in figure 3).
Tool electrode properties means tool electrode material properties, tool movement mode and tool loss properties.
Workpiece processing characteristic includes workpiece material properties, workpiece cutting depth, cutting feed rate and other factors.
Table 2 Orthogonal experimental program and the experimental results Factors experiment results NO.
The most critical factors are feed rate and cut depth.

In the present paper the significance of the first of these factors has been considered.
The authors ascribe the reduction of mechanical properties and emergence of rising porosity to intense gas emission depending on the casting temperature.
Experimental procedure The results of the study [1] have shown that samples cast at Т = 1190÷1170 °С out of the preliminary overheated alloy up to 1280 °С, possess the highest mechanical properties.
Lead bronzes, Bronze SnPb 8-12 and Bronze SnPb 11-5, provide higher mechanical properties at utmost low values of temperature [2].
At low h values there is significant refinement of dendritic lattice of α-solution, which conditions the increase of mechanical properties [6].

The recent development in FEA of SLJs is described with particular reference to three major factors that influence the success of adhesive bonding technique: failure mechanism, environmental effects and mechanical behavior.
The increasing complex joint geometry and its three dimensional nature combine to increase the difficulty of obtaining an overall system of governing equations for predicting the mechanical properties of the adhesively bonded joints.
Using 3D FEA, the present author and coworker [43] studied the influence of adhesive properties on the transverse free vibration characteristics of single lap-jointed cantilevered bonded beams.
The results showed that the strength of the adhesive has a very significant effect on the modal properties of the even modes of vibration but an insignificant effect on the modal properties of the odd modes of vibration.
However, accurate and reliable modelling of adhesively bonded SLJs is still a difficult task as the mechanical behaviour of these joints is not only influenced by the geometric characteristics of the joints but also by different factors and their combinations.

Therefore, the study of changes in the properties of the composite material from which high-pressure fire hoses are made due to the influence of various factors on it is relevant. 1 Literature Analysis and Problem The process of operating high-pressure fire hoses is related to the fact that the composite material from which they are made is exposed to various influences [1].
In [2], a change in the mechanical properties of rubber-like materials that occurs during their long-term storage, which subsequently affects the appearance of defects in them, is considered.
In [3], the change in the mechanical properties of rubber cord composites subjected to cyclic tensile loads was investigated, taking into account the characteristics of their self-heating.
In [20], a study of the mechanical properties of the material from which a fire hose with an internal diameter of 77 mm was made, which had no mechanical damage during its torsion tests, was conducted.
Pustovoitov, Determining mechanical properties of a pressure fire hose the type of «T», Eastern-European Journal of Enterprise Technologies. 6 (2019) 63–70.

High damping capacity is one of the prominent properties of NiTi shape memory alloy (SMA), having applications in many engineering devices to reduce unwanted vibrations.
We found that, besides the material thermal/mechanical properties and specimen geometry, environmental condition also affects the damping capacity; and the critical strain rate critical for achieving a maximum damping capacity can be changed by varying the environmental condition.
Introduction Shape memory alloys (SMA) have superior shape memory and superelastic properties due to the first order thermo-elastic austenite-to-martensite phase transition [1,2].
Theoretical modeling and quantitative analytic relationship between the hysteresis and the governing factors (such as external applied strain/loading rate, ambient condition and material thermal and mechanical properties) have not been fully developed in literature.
Properties of NiTi shape memory alloys and th values in convective environments [9].

The nature of the external factors as well as (to a considerable degree) of the internal processes that took place in construction materials upon influence of the external factors causes hardly predictable results of their influence.
Both mentioned factors cause various effects, unaccounted loads and early damage and breakdown of the equipment.
The cracks appeared in the points of changes of mechanical properties and microstructure of grey cast iron and then spread because of concentration of stresses on exploitation (Fig. 2 a, b).
The mechanical and physical properties of white cast iron and transitional cast iron differ from the properties of grey cast iron.
The mechanical and physical properties of white cast iron and transitional cast iron differ considerably from the properties of grey cast iron.

The deformation mechanism, mechanical properties, and springback of Cr-added TNTZ are described in this paper in addition to the properties of the original TNTZ.
Mechanical properties of TNTZ subjected to thermo-mechanical processing.
Figure 3 shows the tensile properties of the TNTZ rods subjected to each of the thermo-mechanical processings that are shown in Fig. 1 [10].
The tensile properties of the TNTZ rods are mainly determined by the constituent phases.
Mechanical properties.

Flow field simulation analysis of three-way water hydraulic valve based on surface micro modelling Chuanli Wanga, Guangxiang Pan, Haishun Dengb School of Mechanical Engineering, Anhui University of Science and Technology, Huainan, 232001, China aemail: chlwang@aust.edu.cn bemail: B6232009@163.com Keywords:Three-way water hydraulic valve; surface micro modeling; FLUENT; cavitation Abstract.Due to special physical and chemical properties of water medium, three-way water hydraulic valve has many key technical problems that could seriouly affect the operating performance.
The technology begun to research by Hamilton and his workers in the late 1960s, now has commonly used for technical means to improve friction pair surface friction and wear properties in the field of surface engineering technology.
From the perspective of depth of surface micro modelling, the larger depth can better improve safety valve sealing surface flow field, Whereas, too much depth of micro modelling is not only difficult to processing, but also can lead to decline in the mechanical properties of valve core.
Therefore, the depth of surface micro modelling need comprehensive consideration on the effect of various factors and careful decision either.
In view of the special physical and chemical properties of water medium, three-way water hydraulic valve has many technology problems that seriously affect the service life; 2.

In order to analyze the layered structure affect on seismic dynamic response of rock Slope.
Therefore, it provide the basis for dynamic reliability design in the process of slope treatment design to looking for the dynamic load response rule of different layered slope, including the correlation between slope inherent dynamic properties, dynamic loads and structural responses.
Physical and mechanical parameters of the slope are shown in Table 1.
Table 1 Physical and mechanical parameters of the slope Density(kg.m-3) Elastic modulus (Gpa) Poisson's ratio Cohesion between layers (kP) Friction coefficient between layers 2600 45 0.1 40000 0.7 Fig.1 The cross section of the homogeneous (a) , bedding (b) and anti-dip (c) slope The transient dynamic analysis technology was adopted for dynamic analysis of structure.
The following conclusions can be obtained from analyses: (1) Layered structure interface is one of the factors affect on slope seismic dynamic response, and it makes slope seismic dynamic response discontinuous or mutations