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In this technic, the TIG welding parameters are the main factors, which affect weld characteristic and then defines the in-service behavior of the weld joint.
The modeling established by Response Surface Methodology (RSM) makes it possible to form mathematical models in order to analyze more closely the influence of the welding process parameters on the properties of the weld joints while taking into account the various relevant factors governing it [9].
The main objective of our work is to optimize mechanical and metallurgical behavior in the Hate Affected Zone (HAZ) of weld joint.
Three factors, 3 levels design consist of 27 sets of coded conditions.
The first and 27th trials are chosen, considering the big difference in mechanical properties between them.

The influence factors of bearing capacity of water-lubricated thrust bearing and its improving methods are studied.
Secondly, the main factors of affecting bearing capacity are analyzed.
Influence factors of water lubrication thrust bearing’s bearing capacity Materials and hardness match of bearing friction pair.
Many influence factors of thrust bearing, in addition to bearing material and hardness, the viscosity of the water, structure and design parameters are also the important factors that affect the bearing capacity, and the changes would affect the distribution of the bearing water film, so affecting the bearing capacity.
A study on material property and application of water lubricated bearings [In Chinese] [J].

Moringa seeds high quality protein and vegetable fat, make them become a useful source of active coagulant and disinfectants because of their positively charged protein molecules and their antimicrobial properties.
The yield of the oil obtained varies depending on several factors such as extraction temperature, extraction time, ratio of seeds weight to solvent volume, type of solvent used, and stirring in the extraction process which affects the yield of oil from the extraction process using solvents [4], [13], [21].
Grain moisture content, operating pressure, pressing temperature, and pressing time are factors that affect oil recovery from the pressing process [22]–[28]. 2.
The difference in the saponification number is due to several factors such as different hydrolysis process times, the effect of using different hydrolysis temperatures, and oil storage which also affect the saponification number of Moringa seed oil [16], [21], [35]. 3.4.3 Acid value of Moringa oil The acid value obtained in this study showed results that tended to increase with the addition of the pressing temperature, both with a moisture content of 8% Moringa seeds and a moisture content of 16% Moringa seeds.
Innocent, “Physico-chemical and Antioxidant Properties of Moringa oleifera Seed Oil,” Pakistan J.

However, these properties have not been taken into account in predicting the mechanical properties in FEM studies.
The physical and mechanical properties of the PA12-CF filament are given in Table 1.
Table 3 gives the FFF factors that were studied and their levels.
On the other hand, the thermo-mechanical approach takes into account the temperature and stress conditions of the printing process and how they affect the material’s microstructure and properties.
The influence of residual stress on the flexural strength of FFF parts is complex and is dependent on various factors.

China asunhaibin111@163.com, byujunzhangcn@sdu.edu.cn(corresponding author), clqs51688@163.com Keywords: B4C/SiC, Reaction sintering, Mechanical properties Abstract.
The influence of B4C content, species and content of carbon, sintering temperature on the mechanical properties of B4C/SiC composite ceramic were studied.
The physical and mechanical properties of the composite ceramic such as density, bending strength, fracture toughness were investigated.
We can conclude that the main factors affecting reaction rate are dissolution rate of carbon atoms and precipitation rate of crystalline SiC.
Effect of fiber type on mechanical properties of short carbon fiber reinforced B4C composites, Ceramics International. 35 (2009) 1461–1466

Mechanical properties of nano/micro-silica particles bidispersed epoxy composites were investigated based on experimental results.
These dominant factors are also related to the particle-matrix interaction because of the cross-linking network morphology in epoxy matrix.
All these results, with propagation of crack in a matrix phase, indicated the mechanical properties of the composites were governed by epoxy matrix properties expressed by fragility, rather than stress field in matrix which was dependent on thermo-viscoelastic properties.
Furthermore, thermo-viscoelastic properties were affected by the maximum particle packing below Tg and the mobility of matrix resin above Tg.
Randel: Mechanical Properties of Polymers and Composites (Marcel Dekker, New York 1994) [5] N.

The research results of this paper are not only helpful to understand the laws of the mechanical properties of early-age shotcrete, but also provide some reference for the reliability analysis of tunnel under construction.
So the mechanical properties of the early-age shotcrete are very important for the safety of the tunnel.
Sand ratio of shotcrete is from 45% to 55% [3], which is higher than that of ordinary concrete. (4) Humidity and temperature inside the tunnel are less affected by the changes of external factors, so the service conditions of shotcrete are more stable than that of ordinary concrete.
Based on characteristics above-mentioned, the mechanical properties of the early-age shotcrete are different from that of ordinary concrete.
[11] GB/T50081-2002, Standard for test of mechanical properties on ordinary concrete(In Chinese)

The uniform microstructures and mechanical properties of the steels can better satisfy the requirement of production.
Mechanical properties of experimental steels are shown in Fig.1.
Mechanical properties and microstructures of simulated HAZ.
The No.1 steel was employed to evaluate the weldability because of its good mechanical properties and better economical effectiveness.
Mechanical properties such as strength and toughness were tested with the same method as mentioned.

The role of zinc and how to improve the welding process in order to improve the mechanical properties of joints have been studied[4,6].
The appearance of weld, microstructure, mechanical properties, and composition of the joints were investigated.
Since temperature is one of the major factors influencing the diffusion of atoms[11].
,FeAl, FeAl2, Fe2Al5, FeAl3 etc) will lead to a sharp decline of mechanical properties of joints.
He: Interfacial microstructure and mechanical properties of aluminium and zinc coated steel joingts made by a modified metal inert gas welding-brazing process.

Dynamical mechanical behavior of concrete with high temperature is affected by not only the strain rate effect, but also the high temperature weakening effect, and the strain rate hardening effect is coupled with high temperature weakening effect, but the latter has greater influence.
Study on high-temperature mechanical properties of concrete shows that compressive strength has obvious temperature weakening effect, namely, the strength recedes with temperature rising [7,8].
Meanwhile, to facilitate analysis of material physical properties, in allusion to the intercoupling strain rate hardening effect and temperature softening effect, two mutually independent influence factors are set, with and KT respectively employed to denote, thus stress-strain curves of concrete can be uniformly expressed as: (1) Where E0 denotes the he initial elastic modulus of material,denotes the damage quantity, and 0 ≤ D ≤ 1, it is obvious that non-linear behaviors of stress-strain curves are described completely with damage quantity, while the strain rate hardening effect and temperature softening effect are described withand KT.
(a) T=220℃, (b) T=350℃, (c) T=400℃, (d) T=600℃, Fig. 4 Comparison between own experimental results and model equation Conclusions (1) According to SPHB tests of concrete under different temperatures and various loading conditions, then high-temperature dynamical behavior of stress and strain is obtained, based on damage factors, concrete failure evolution is described, the intercoupling strain rate hardening effect and temperature weakening effect are simply set as mutually independent factors, then uniform expression of concrete stress-strain curve is established
(Advances in Mechanics.2006.36(3):389-405) [4] Jia Bin, Tao Junlin, Li Zhengliang,Wang Ruheng, Zhang Yu: Effects of temperature and strain rate on dynamic properties of concrete.