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Structural dimensions are the major factors affecting mechanical strength and manufacturing cost of diaphragm chamber.
Mechanical strength of diaphragm chamber was checked in the light of ASMEVIII-2.
Diaphragm chamber is connected with diaphragm chamber covers, suction valves and discharge valves in fluid end, so we should fully consider the fluid pressure, pre-tightening force of bolts and other factors during designing process.
The diaphragm chamber is made of alloy steel ZG20Mn, material properties of ZG20Mn are as follows: tensile strength (σb) is 510MPa, yield strength (σs) is 295MPa.
Fig. 3 Von Mises stress and displacement distribution graphs of diaphragm chamber Fig. 4 Stress evaluation paths of diaphragm chamber On the basis of stress generation reasons, stress concentration regions and stress properties, stresses of pressure vessel can be classified into broad categories as primary general membrane stress (Pm), primary local membrane stress (PL), primary bending stress (Pb) and secondary stress (Q)[2].

The results indicate that steel fiber is one of the most important factors affecting compressive strength and shrinkage, and polypropylene fiber is one of the most important factors affecting flexural strength and shrinkage of cement mortar.
The properties of all the fibers are shown in Table 1.
There are many factors that can affect the cement mortar’s mechanical properties and shrinkage.
In order to obtain excellent mechanical properties and low shrinkage rate, orthogonal experiments were adopted to optimize the mix proportion.
Considering the effect of factors on the properties comprehensively, the optimized mix proportion of hybrid fiber reinfored cement mortar is confirmed as follows: steel fiber fraction (by volume) is 1.0%, polypropylene fiber fraction (by volume) is 0.6% and silica fume fraction (by weight) is 12%.

Degradation of mechanical properties of electric explosive device fuse-head was serious in different temperature and humidity environments.
The explosive broken and corrosion damage on lead induced by temperature and humidity aging were the main factors affecting the firing probability.
The temperature and humidity are serious environmental factors affecting the structure of electric explosive device.
Fig.1 Equipments for producing aging damage Results and discussion After the procedures of accelerated aging, there produced a mount of corrosion damage speckle on the surface of the specimens and the coatings surface properties were also affected by hygrothermal aging.
After the procedures of accelerated aging, there produced a mount of corrosion damage speckle on the surface of the specimens and the coatings surface properties were also affected.

The dynamic mechanical properties of the blends of polyacrylic ester and various nano-fillers and the effect of nano-filler on the damping properties of polyacrylic ester damping paint were studied by using dynamic mechanical analysis (DMA) in this paper.
When the nano-filler was filled into damping paint, it will affect the damping property for the paint.
So, the dynamic mechanical properties of the blends of polyacrylic ester and various nano-fillers and the effect of nano-filler on the damping properties of polyacrylic ester damping paint were studied by dynamic mechanical analysis (DMA) in this paper.
The sample’s dynamic mechanical properties such as loss tangent was obtained through a NETZSCH DMA 242C type dynamic mechanical analysis tester in the temperature ranging from -60 °C to 140 °C with a heating rate of 3 °C/min and a frequency of 2.5 Hz.
Comparing with the pure polyacrylic ester, when adding nano-polyacrylic ester rubber powder to the polyacrylic ester latex, the peak value of loss factor for the blend increased evidently, which indicated that the damping properties for the blend increased, and the damping properties increased with the content increase of the nano-polyacrylic ester rubber powder.

Eight control factors were designed in an L18 orthogonal array experiment, and the effects of the control parameters on the surface properties were critically evaluated in the experiments.
Statistical Variation Estimation affecting Coating Characteristics Table 1 Selecting significantly factors from analysis of variance Symbol Sum of Squares Degree of Freedom Mean square F-test Contribution percent A 0.089 1.0 0.089 3.301 1.80 B 0.243 2.0 0.121 4.504 24.98 C 0.602 2.0 0.301 11.167 2.03 D 1.213 2.0 0.607 22.489 2.37 E 0.324 2.0 0.162 6.004 20.49 F 1.405 2.0 0.702 26.039 10.17 G 0.714 2.0 0.357 13.228 36.11 H 1.540 2.0 0.770 28.550 1.17 Error 0.054 2.0 0.027 1.000 0.89 Total 6.185 17.0 100.00 The analysis of variance explores the control factors that significantly affect the quality characteristics of integrated properties.
It can be found that accelerating voltage, stand-off distance, powder feeder rate and carrier gas accounting for nearly the 91.75% of total variance affecting the integrated properties.
The experimental results identify that accelerating voltage, stand-off distance, powder feeder rate and carrier gas are the main parameters among the eight control factors that significantly influence the surface properties in plasma sprayed coatings, in which these factors account for nearly 91.75% the experimental variation.
By applying significant factors from analysis of variance in the grey relational analysis, the surface properties could be effectively improved in this study.

Mechanical Properties of Concrete after High Temperature Cycling Test Overview.
This causes the peak stress of concrete to decrease as the number of cycles increases, and the mechanical properties of concrete gradually deteriorate.
Mechanical properties of PVA Fiber-Reinforced Concrete after High Temperature Test Overview.
The properties of PVA fibers are shown in Table 3.
From the experimental results of the thermal conductivity of bentonite, it can be seen that the main factors affecting its thermal conductivity are actual water content, actual dry density and porosity.

Effects of Electromagnetic Pump Casting on Microstructure and Mechanical Properties of ZLSi9Mg Casting Aluminum Alloy Jingzhi Danga, Jing Yang, Jun Cheng School of Materials Science and Engineering, North University of China,Taiyuan 030051,China a wxdjz11@nuc.edu.cn Keywords: ZLSi9Mg aluminum casting alloy; Electromagnetic pump; Microstructure; Mechanical property; Fluidity Abstract.
Range analysis shows that the main factors are electromagnetic intensity, current and time and 200A, 291mT, 25min is test to be optimum parameter.
Variance analysis shows that electromagnetic induction intensity greatly affect the mechanical property of cast and current has certain effect and time does not no effect.
From the property of the alloy, it is believed that viscosity is a main factor affecting the flowing power.
The amount and property of inclusion are important factors affecting the viscosity of alloy.

Factors influencing the machining surface layer of physical and mechanical properties.
Plastic deformation and heat is more serious than the blade cutting, so after cutting and grinding processing surface layer the three physical and mechanical properties above will change a lot.
The main factors impact cold hardening.
Mechanical processing surface quality affects the performance of machine use [J].
Mechanical processing surface quality and influence factors analysis [J].

Cooling Curve Based Estimation of Mechanical Properties in High Strength Steel Welds Rahul Sharma1*and Uwe Reisgen1 1RWTH Aachen University, Welding and Joining Insitute, Pontstr. 49, 52062 Aachen, Germany Keywords: welding, cooling curve, HSLA Steel, mechanical properties Abstract.
Welding of HSLA steels The selection of welding parameters for fully mechanized arc welding processes is determined by technological factors.
The Influence of the main alloying elements on the mechanical properties has been studied in [3] together with the cooling rate influence [3] Evaluation of mechanical properties For the relationship between welding parameters and mechanical properties, the cooling time is considered as a major criterion, as it strongly affects the resulting microstructure and thus, the mechanical properties [5].
It can be clearly seen that there is no general significance of the cooling time regarding the mechanical properties.
Kao, The effect of alloying elements on the structure and mechanical properties of ultra low carbon bainitic steels, J.

Affected Characteristics Analysis of the Pulsed Laser Forming of Metal Sheet Lijun Yang1,a and Yang Wang 1 1 Department of Mechanical Manufacturing and Automation, Harbin Institute of Technology, Harbin, China a yljtj@hit.edu.cn Keywords: Pulsed laser forming, Heat-affected zone (HAZ), Pulse parameter, Hardness Abstract.
Through the analysis of the fundamental theory of pulsed laser affected, this paper shows the affected characteristics of metal sheet with pulsed laser forming.
The pulse parameters are the important influencing factors in the pulsed laser forming.
Therefore, this work demonstrates the changes in microstructure and mechanical properties of stainless steel 1Cr18Ni9 by Nd:YAG pulsed laser forming.
In the pulsed laser forming, the overlapping spot is the most influential factors for the interactive time and energy.