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The influence of spray parameters on the particle in-flight properties and the properties of HVOF coating of WC-CoCr was examined by Zhao et a. [2].
The factors affecting the bond strength of high velocity oxy-fuel spray coating were studied by Wang et al. [3].
The influence of process parameters on molten particle speed and surface temperature and properties of HVOF coatings were investigated by Lib et al [4].
They indicated that stand-off distance, gun barrel length, and gas flow rate were the most influencing parameters on the coating wear properties.
The properties of HVOF NiAl nanostructured coatings were investigated by Hu et al. [6].

To combat this uncertainty, higher design safety factors and/or increased operational inspections are typically employed to ensure adequate safety [[] G.
Davinson. s.l.; Mechanical Properties of Composite Materials Containing embedded Optic fiber Sensor SPIE, 1991. ].
Table 2: Mechanical properties foam core (T-Tension, C-Compression).
Foam: Airex R82® E ν ST εT SC G 99.7 MPa 0.4 2.6 MPa 3.1∙104 με -1.4 MPa 31.4 MPa Table 3: Mechanical properties of the composite skin (T-Tension, C-Compression).
These properties were assigned to the 3D and 2D element mesh.

Therefore, building energy-saving has been a task which brooks no delay, and how to reduce heating energy consumption has become a key factor in our energy reduction.
The primary factor of reducing building energy consumption is the energy saving of walls — one of the exterior protected construction.
The material has the small apparent density and thermal conductivity,the low water absorption, the great sound insulation, the high mechanical strength the high dimensional accuracy and the homogeneous structure.
One with good insulation properties has the low density, low tensile strength and the poor durability.
Plug-type exterior insulation Plug-in insulating materials, mainly include Rock wool board, glass wool blanket, polystyrene foam (EPS board), extrusion board (XPS board), ceramic decorative concrete composite polystyrene insulation board, steel wire frame Sandwich wall panels, etc.Polystyrene board which due to its good physical properties and low cost, has been widely used around the world.

The fracture surfaces, some cracks, and the structure that was not affected by the failure, were investigated by optical microscopy.
During the operation the die is subjected to cyclic temperature changes and to increased stress and deformations and must present excellent mechanical properties [3, 4].
Sample: The front (a) and the back (b) size of the fractured die rib The fracture surfaces, some cracks, and the structure that was not affected by the failure, were investigated by optical microscopy (Fig. 7).
Carbides are not affected by grinding, due to significant hardness and create small protrusions.
Other factors that could have contributed to die failure, such as the characteristics of fractures due to fatigue, erosive cracking under pressure or in the absence of pressure, fragility of liquid metal or hydrogen and creeping were not found.

Simulation and Optimization of a New Hydraulic Impactor Hongqiang Zhao1, 2, Peng Liu1,Minfei Shu1,Guochen Wen1 1School of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, 410083, China 2Sunward R&D Center, Xingsha Development Zone, Changsha, Hunan, 410100, China E-Mail: hewn123456@126.com Keywords: hydraulic impactor; dynamic mathematics numerical model; simulation; optimization.
This model facilitates accurate analysis of parameters affecting the property of impactor, thus providing a better design method for the optimization design of hydraulic impactor.
Its working progress complies with fluid motion and mechanical motion law, and is influenced and conditioned by a variety of factors.
According to the fluid motions and mechanical motion theory, the mathematical model can be built.
In order to analyze and solve problems conveniently, such appropriate hypotheses to the factors which are difficult to be fully considered but have little effect on the results of analysis are established: (1) Oil is incompressible and temperature is the same everywhere in the working progress; (2) The oil viscosity is not affected by the pressure; (3) All the components are absolute rigid body except the accumulator diaphragm; (4) The accumulator diaphragm’s mass is zero and it has no resistance in the state of deformation; (5) In most cases, the mass of oil is ignored and it can only be considered as lumped parameter when necessary; (6) The fuel delivery of oil pump is invariant when its delivery volume is constant; (7) The transfer time of pressure wave in the oil is ignored.

Stress Forming of Fine Metal Wire Based on Ultrasonic Vibration LUO Yi1,a, YANG Chuan-long1, SONG Yue-ming1, WANG Xiao-dong1 1School of Mechanical Engineering, Dalian University of Technology, Dalian China aluoy@dlut.edu.cn Keywords: ultrasonic; internal stress relief; flex lead; vibratory stress relief; simulation analysis Abstract.
The assembling process of the flex lead of an accelerometer can bring in internal stress, which causes drift error and affects the precision of the accelerometer.
Ultrasonic generator produce high power and high frequency alternating current, ultrasonic transducer converts electric power into mechanical energy in the form of ultrasonic vibration with micron-sized amplitude.
The operation object of UVSR experiment is fine copper wire with a diameter of 150 μm, which has the similar material property and function to the flex-lead.
The deviation is probably caused by environmental factors and precision of the tools, the repeatability of the test can be assured.

Many factors on dipper handle structure calculating have to be assumed and simplified, which reduces the reliability of the results [4].
Based on structure properties and load conditions, fracture reasons had been obtained.
In order to reduce computing time, some small pieces and pads that do not affect the force are neglected.
The properties of dipper handle are shown in Table 1.
The strain gauge temperature will change along with the dipper handle temperature, because of strain gauge material properties.

The stress on the weld is one of the key factors and should be given special attention.
Zhu Yaohong et al [7] experimentally studied the mechanical behavior of the longitudinal joint of the subway shield tunnel under different joint bolts; Zhao Qing [8] established different finite element models of the shield tunnel to study the mechanical properties of the shield tunnel segments and bolts.
Material properties.
Mechanical properties of the material.
(in Chinese) [8] Zhao Qing.Study on three dimensional numerical modeling method of shield tunnel and mechanical properties of lining [D].Sichuang: Southwest Jiaotong University,2017.

Therefore many road slope are constructed in the process of road construction, the stability of road slope affects the safety of its excavation and road operation phase[1].
Because the physical and mechanical properties of the weak interlayer is poorer it often brings many problems for slope engineering construction, and it usually controls the stability of road slope.
For the road slope to ensure adequate safety factor, it is recommended to take low strength parameters of weak interlayer[3].
However, owing to the complicated geological conditions, the significant difference between the actual engineering, the physical and mechanical parameters has some difference even the same rock mass in different engineering, the property of weak interlayer is different in different engineering, so must carry out specific analysis for the actual engineering.
The constitutive model must be selected in numerical analysis, which expresses the relationship between stress and strain under external load, and is the empirical description of material mechanical characteristics.

This system of mainly serially connected elements is characterized by the throughput (overall amount of bulk coal respectively overburden rock produced), which is dependent on the functioning state of each involved equipment, and is strongly affected also by the process inherent variability due to the randomness of the involved processes (e.g. the cutting properties of the rock).
This system of mainly serially connected elements is characterized by the throughput (overall amount of bulk coal respectively overburden rock), excavated, conveyed and sent to stock pile or next user, which is dependent on the functioning state of each involved equipment, and is affected also by the process inherent variability due to the randomness of the cutting properties of the rock.
It is presumed that L is always less than S, the difference S-L being called safety range while the ratio S/L is called safety factor.
Kovacs, Research Regarding The OEE (Overall Equipment Effectiveness) Assessment Of The Coal Open Pit Mines Production System, Annals of the University of Petroşani, Mechanical Engineering, 8 (2006), 139-146 , ISSN 1454-9166 [5] I.