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Hence this project aims at obtaining the best surface finish by optimizing various process parameters affecting the machining conditions.
Introduction Wire Electric Discharge Machining (WEDM) is one of the greatest innovations affecting the tooling and machining industry.
No. of two level factors = 1 Deg of freedom of 2 level factor = 1*(2-1) = 1 No. of three level factors = 6 Deg of freedom of 3 level factor = 6*(3-1) = 12 Total Dof of factors and levels = 1+12 = 13 In general if there are 'n' experiments from an orthogonal array, Degree of freedom of orthogonal array = n-1As per the rule, Degree of freedom of orthogonal array >= Degree of freedom of factors & levels Here the degree of freedom of factors and levels is 13.
It also contains one 2-level factor and seven 3-level factors.
[2] Juhr.H, Schulze.H.P, Wollenburg.G, Kunanz.K ‘Improved cemented carbide properties after wire EDM by pulse shaping’, Journal of material processing technology Vol. 149, (2004) pp. 178-183

Rashid et al[2]. studied the structure and electrical properties of GaP by density functional theory.
Since the GaP bandgap calculated by the band structure is 1.580 eV, a 0.68 eV scissor factor was introduced during the analysis of the optical properties.Fig 3(a)-(c) show the absorptivity, dielectric function, and complex refractive index, respectively of GaP.
First-principles study of the electronic structure, optical properties and anisotropy of GaP[J].
First-principles study of the structural and electronic properties of III-phosphides[J].
Ab initio simulation of the properties of ferroelectric materials[J].

White carbon black's rubber reinforcing effect depends on its particle size, surface properties, structure, and its dispersion in rubber.
Though using resin acceptor to modify the White carbon black can change the surface physical and chemical properties, and improve the compatibility between rubber molecules and the interaction, processing technology to improve performance, increase the reinforcement of silica.
The main technological conditions affecting the reaction conditions include: hydrochloric acid dosage, reaction concentration, reaction temperature, Wollastonite particle size, reaction time and so on.
(2) The acid-insoluble impurities that Wollastonite contained in the test are a most important factor that affects the quality of silica.
(3) Silica purification method and the location of the processes is one of the most important factors of production which need to be further refined through pilot studies.

Wear-related microstructures and micrographs linked mechanical properties to wear behavior.
Most research focuses on certain factors while ignoring others because it is nearly impossible to empirically examine all the factors that contribute to the tribological phenomenon.
Epicier, Effects of heat treatments on the microstructure and mechanical properties of a 6061 aluminum alloy, Mater.
Schlafka, An influence of slag refining on the structure and mechanical properties of the brass CuZn39Pb2, Int.
Schlafka, An influence of slag refining on the structure and mechanical properties of the brass CuZn39Pb2, Int.

Rock mechanical property is determined by rock strength as above analysis and structural surface.And structural surface strength, density, continuity and combination play a very important role in rock mechanical property and stability.
And they are potential factors of rock damage.Because structural surface strength is much less than rock tensile strength, some weak surface such as joints, beddings, schistosities and fractions may break up before rocks under ground strength.
And these are main factors: (1)Massive engineering practices indicate that great part of engineering rock instability and damage is caused from weak structural surface.
And structural strength property is a key factor for rock stability judgment
(3)Rock stress distribution under load is affected by structural surface and its mechanical property.

Structural features such as grain size and morphology, phase transformations are very sensitive to the influence of temperature fields and directly affect the microhardness and mechanical properties of materials [6, 7].
Mechanical properties of alloys depend on their structural-phase state.
Mechanical properties of specimens before and after heat treatment.
Mechanical properties of samples before and after heat treatment.
In order to redistribute the complex of mechanical properties, heat treatment is proposed.

Introduction Poly(urethane-imides) are a relatively new group of technically significant polymers with high heat resistance and excellent mechanical properties [1-3].
The immediate task of the work is to show what influence the chemical composition factors and the factors of separation and interaction of phases formed by flexible polyester and rigid imide blocks have on the glass transition (Tg) and melting (Tm) and mechanical properties in modified polymer systems.
According to the results of tests of mechanical properties, the prepared polymer compositions are close to polyimide thermoplastics of the structural type.
Inoue Influences of Diamines on the Morphologies and the Chemical, Thermal, and Mechanical Properties of Polyurethane-Imide Elastomers, Open J.
Kudryavtsev, Dynamic mechanical properties, thermal and heat resistance of multiblock co-poly(urethane-imide) films with graphene and tungsten disulfide, Rus.

In practice, a crack presence modifies the mechanical behavior of structures, or elements, and affects their integrity.
In this case, the mechanical behavior of wood is strongly influenced by the moisture content and the fracture process evaluation encounters another problem related with the variability of the material properties in term of climatic conditions [5].
the crack relative displacement intensity factor can be determined without an explicit knowledge of the material elastic properties.
By imposing a loading under force control the numerical evaluation of stress intensity factor can be realized using an arbitrary orthotropic constitutive law with the arbitrary elastic properties.
Takashi, Automatic Evaluation of mixed-mode stress intensity factors utilizing digital image correlation.

Aimed at the size, shape and weight of crankshafts with larger size, theoretic research is done, and main factors for finishing uniformity are analyzed.
Consequently, it has effects of finishing crankshafts, increasing surface quality and improving the physical-mechanical properties.
For definite crankshaft, main factors affecting finishing effects may include: motion and geometry parameters of equipment, machining medium characteristic, finishing time, etc.[3,7-8].
Wang: China Mechanical Engineering, Vol.12 (2001) No.1, pp.300-302.
Wang: China Mechanical Engineering, Vol.10 (1999) No.5, pp.502-505.

This will include all of the steps, from developing of initial models which would represent the real behaviour of welded joints with defects with various approximations, to the final stages when fully functional models, which took into account a wide range of different factors for the sake of accuracy.
In both cases, VAC60 was used as filler material, due to its chemical composition (similar to the parent material) and mechanical properties (noticeably better than the PM), as well as availability.
In this case, a more detailed approach was adopted, including the heat affected zone as an individual welded joint region, with its own tensile properties and dimensions, which were determined based on the real specimens, for each group.
This stage of numerical simulations involved two steps: · First, it was assumed that the HAZ and PM had the same tensile properties and these models were used to obtain a sufficiently accurate representation of the experiment · Then, after satisfactory results of the first step were achieved, the heat affected zone was included with its own values of yield stress and tensile strength, which were initially assumed and then varied iteratively until good agreement was achieved between the HAZ of numerical models and specimens.
Since the simualtions presented here were based on a large number of factors, including the mechanical properties of used materials, it can be seen that these factors are related to chemical compositions and welding technologies.