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Product with low cost, lightweight and enhanced mechanical properties were the main reasons welding dissimilar materials thrived by most of the industries.
The main objective of this study was to find out the weldability of these materials and investigate the mechanical properties of the welded butt joints.
In order to laser weld two dissimilar materials with two different metallurgical and mechanical properties, the selection of proper welding variables is very important [2].
The focusing parameter is mostly affecting the weld pool surface width.
The main factors affected the tensile strength and weld bead geometry were the peak power, Pp followed by the pulse duration, w.

Moreover, the time when the water-cone breakthrough will directly affect the final recovery of the gas wells, therefore, the numerical simulation method is used to conduct the research on the key influencing factors of water-invasion performance for the gas wells with bottom-water, which is the basis of the mechanical model for the typical gas wells with bottom-water.
It indicate that as followings: (1) the key influencing factors of water-invasion performance for the gas wells with bottom-water are those, such as the open degree of the gas beds, well gas production and the amount of Kv/Kh value; and (2) the barrier will be in charge of great significance on the water-controlling for the bottom water gas wells, and its radius is the key factor to affect water-invasion performance for the bottom water gas wells where the barriers exist nearby.
Lots of researchers have already been conduct some study aimed at water-invasion [1-6], in this paper, however, taking the PG gas-field as an example, typical mechanical models were established, and its key influencing factors of water-invasion were worked out by using the numerical simulation. 1.
Key influencing factors of water-invasion performance Numerical simulation research on the key influencing factors of water-invasion performance was carried out, which is based on the above mechanical models for the typical bottom-water gas.
Conclusions Mechanical models for the typical gas wells with bottom water were established through the numerical simulation methods, moreover, the numerical simulation for the six factors of that will influence water-invasion performance

The results showed that mechanical stress has affected the surface degradation of an insulation performance when the mechanical load is increased combined with high electrical field.
Surface tracking is occurred as result of many factors such as electrical effect, mechanical effect and environment etc.
One of the cause that affect the process is mechanical stress effect from the weight of cable.
The experimental, one can concluded that the weight of cable may produce the mechanical stress effect on the cable spacer surface that reduce the dielectric property.
The Effect of Environmental Factor on the Performance of Polyester Outdoor Insulators: Vol. 3.

Such porosity stabilizes the mechanical properties while also reducing the mean density of FGC.
The research team has analyzed how the formula and the technology could affect FGC properties using mathematics to design the experiments, as necessitated by the fact that the quality and durability of construction materials depends on a variety of factors.
The way the formula and the technology affect FGC properties is what defines the optimality of concrete-mixture formulas.
Multifactorial design of regression experiment was intended to discover how technology and formula could affect the physical and mechanical properties of FGC [1,5–7,20].
The goal was to apply a set of physical and mechanical methods to find how the fundamental technological factors could affect concrete properties and structure as well as the aggregate-mortar interface.

Other than strain rate and temperature, humidity is also one of the factors that affect the ductile properties of PMMA.
The output from the experimental works proved that the tensile properties of RT-PMMA are affected by the presence of humidity for all three grades of PMMA under consideration.
Moisture and humidity are known to affect a range of polymer properties, such as processability, dimensional stability, mechanical, acoustic, electrical, optical, and chemical properties, and ultimately the performance of products[8].
For PMMA specimen, the relative humidity does not have significant effect to its mechanical properties since the observation time is very short as it is too brittle.
Velickovic, The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate, Int.

Microstructure is an important factor that influences the mechanical properties of recycled aggregate concrete (RAC).
Recycled aggregate on the long term mechanical properties and pore system of RAC that were prepared with 100% substitution of natural coarse aggregates was assessed, at the same time, the effect of long-term (up to 5-years) water curing on the mechanical properties of the RAC was quantified[3].
Correlations between microstructure and mechanical properties are discussed.
The result verified that the relatively lower porisity of the recycled concrete benefit to development of mechanical properties.
Influence of recycled aggregates on long term mechanical properties and pore size distribution of concrete.

The mechanical properties and stress-strain curves were obtained.
The low temperature mechanical properties such as maximum tensile stress, elastic modulus and strain at maximum stress against temperature are different from room temperature mechanical properties.
The study is devoted to the investigation of low temperature failure mechanism and mechanical properties law of HTPB propellant.
There are two factors for causing stress yield: (1) internal factors, which are plastic behavior of propellant matrix at low temperature and high content of greater particle, and (2) eternal factors, such as the low temperature and loads, which will induce crack propagation, cavities, and de-wetting.
Mechanical properties analysis.

The properties of the composites are determined by the properties of fillers, such as mechanical properties, content, size, shape, interfacial interaction with polymer matrix and dispersion, etc [3, 4].
Results and Discussion Mechanical Properties.
Table 1 Mechanical and insulating properties of the epoxy resin modified with spherical silica particles.
Dielectric and Insulating Properties.
The dissipation factors show an increasing trend with increasing frequency from 100 Hz to 2 MHz.

Slope stability is affected by many factors, their effects on the slope stability may be bigger or smaller.
Along with continuous improvement of the various calculation methods, it is more important to identify the main influencing ratio factors in the process of analyzing the slope stability than to select the method of calculation .Therefore the paper analyzed the main internal factors, calculated to get five curves that showed the relationship between these influence factors and the safety factor, The results show that unit weight of soil, cohesion and internal friction angle are the main factors affecting slope stability.
Introduction Slope is the natural or artificial slope, human engineering activities in the most basic geological environment, but also the construction of the most common form of project. slope slide seriously endangering the safety of state property and people. [1] There are many factors that affect the slope stability.
According to the different systems of slope internal and external influence factors, they can be divided into two categories: one is the slope of the material composition, physical and mechanical indexes, the topography, rock mineral composition, soil and rocks geological structure surface and slope shape that can be called the internal cause.
References [1] Yuluan Li, Slope deformation and its influence factors analysis [J].

Crystallinity is one of the most important factors affected to both embrittlement and softening temperature[1].
Macroscopic mechanics properties were detected to reveal the influence of change in crystallinity on mechanical property.
The two Ethylene-octene copolymers had almost the same mechanical properties.
It should be pointed out that not only polarity but also the other factors have affect on compatibility of polymers.
Equilibrium of distilled water on each sample 3.2 Relationship between mechanical properties and crystallinity The crystallinity of PLA matrix affected by POE, the result of XRD test on PLA matrix was shown in fig. 2.