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Because the position of neutral plane is related to mechanical properties of the material, material thickness, bending angle, and inner radius, so it's difficult to get an accurate value of the position coefficient of neutral plane K.
Fig. 3 Dimensional model and unfolding model of sheet metal parts in Pro/E Before using the Unbend function to unfold, K-factor in Bend allow should be set up.
It is worth noting that K-factor is equal to the position coefficient of neutral plane K, so K-factor is also an empirical data.
In addition, no matter which method is chosen, the position coefficient of neutral plane K is a key factor affecting sheet metal parts unfolding accuracy.
Application of Pro/E in Sheet Metal Expanding Size and Confirm Factor Y [J].

Introduction Epoxy resins are extensively employed in several important applications such as adhesives, surface coatings and advanced composites, etc. because of their superior properties such as good mechanical properties, chemical resistance, adhesive and insulating properties etc..
The as-prepared samples were finally sliced for thermal/mechanical property testing.
Fig.1 Impact/tensile strength as a function of the content of SEBSMB Results and Discussions Fig.1 shows the effect of addition of the reactive block copolymer SEBSMB on the mechanical properties of cured epoxy resin.
The storage modulus and loss factor of the cured samples with various content of SEBSMB were shown in Fig.2 and Fig.3.
It means that the Tg of the samples was seldom affected by the addition of the reactive block copolymer, unlike the system modified with flexible Fig.3 Loss factor of the cured resin with various content of SEBSMB as a function of temperature Fig.2 Storage modulus of the cured resin with various content of SEBSMB as a function of temperature block copolymer PEO-PPO-PEO or rigid block copolymer PS-b-PMMA [11].

Formability enhancement Temperature, hydro forming and application of hydraulic counter pressure are some of the key factors that determine the formability of a material.
At high temperatures grain growth phenomenon takes place that adversely affects the mechanical properties and surface roughness of the product [2].
Experimental Procedure Punch diameter [mm] 62 (1:100 taper) Yield stress [MPa] 133 Punch profile radius [mm] 4 Ultimate tensile strength [MPa] 293 Die diameter [mm] 65.6 Strain hardening exponent 0.22 Die profile radius [mm] 6 Table 1 Dimensions of punch and die and properties of the sheet metal Figure 1 Tooling for warm deep drawing with hydraulic counter pressure.
The sheet metal is deep drawing steel (ASTM A591) and its properties are also mentioned in Table 1.
Hawkins: Journal of Mechanical Working Technology Vol. 11 (1985), p. 5-21 [4] H.

Grain size, crystallographic texture and precipitation are the main factor for controlling the magnetic properties of non-oriented silicon steels.
Recently, various works have been carried out aiming at improving the magnetic properties [1-3].
Magnetic properties were measured by using a sheet tester in rolling direction with the size of 30mm×100mm.
It can conclude that the magnetic properties of WC sheets are more excellent than that of AC sheets.
Microstructure, texture and magnetic properties of strip-cast 1.3% Si non-oriented electrical steels.

Their influence on the structure of cement stone differ in each case, but in general can be divided into a physical influence – mikrofiller filling the fine pores and enhancing mechanical properties and impermeability of cement stone, and a chemical influence – the reaction with the components of cement clinker, leading to the formation of additional structures, which in turn positively affect the mechanical and durability properties of the composite.
Nanoparticles offer significantly improved properties (especially reactivity) than their micro-counterparts and moreover, due to quantum effects, they may offer entirely new properties.
The product of this reaction is C-S-H gel, which fills cement stone pores and enhances its hardened state mechanical properties [4].
Both mentioned nanoparticle doses have advanced to the next stage, in which their effects on physical and mechanical properties of cement mortars, particularly tensile and compressive strength, were verified.
This phenomenon is observed by many authors and refers to a specific behavior of nanoparticles that affect the initial properties, but interfere less in the longer-term ones.

Introduction The copper-nickel alloy is playing an irreplaceable part in marine engineering for heat condensers, desalination equipment, water supply lines and in other tube applications, due to its excellent physical and mechanical properties, remarkable resistance to seawater corrosion and biofouling [1,2].
In spite of the appropriate properties of the 90Cu-10Ni alloy, instances of failure have been experienced in practice [4,5].
The factors influencing corrosion resistance can be roughly divided into two categories, material factors (chemical composition [8-13], component segregation [14], surface state [15], etc.) and environmental factors (temperature [16], pH [17], flow rate [18], etc.).
The rational procedure of mechanical polishing and optimization of electropolishing parameters are essential factors to get good quality of patterns.
For mechanical polishing, the scratches are often unintentionally induced to the sample surface during grinding or mechanical polishing.

The proposed method can predict the regular pattern in which bearing stiffness and bearing span affect natural frequency and harmonic response.
The spindle system is one of the most important parts of the turning centre; its dynamic characteristics directly affect the cutting ability.
In this study, structural factors which influenced the critical speed of the spindle system were mainly discussed, and the analysis is shown as follows [9].
These modes are mainly affected by structural stiffness of the spindle head stock, which are further determined by the interface properties of linear components in the feeding mechanism of the head stock.
[7]- Ṧooṧ L’ - Contribution to the research of static and dynamic properties of CNC turning machine - STROJNỈCKY ĈASOPIS, 59, 2008, no. 5–6, pp. 231-239

Additionally, it exhibits poor resistant to moisture, which lead to high water absorption, subsequently resulting in poor mechanical properties and dimensional stability of the natural fiber reinforced composites [5].
It also has been reported that by using the circular fiber area assumption, a considerable error is introduced into the calculated mechanical properties.
This value showed that, different levels of the factor affect the response differently.
[15] Nor Azowa Ibrahim, et al., "Effect of Fiber Treatment on Mechanical Properties of Kenaf Fiber-Ecoflex Composites," Journal of Reinforced Plastics and Composites, vol. 29, pp. 2192-2198, July 1, 2010 2010
Mwaikambo, "Tensile properties of alkalised jute fibres," Bioresources, vol. 4, pp. 566-588, 2009.

Introduction In processes of fusion welding the crystal structure of metal in the welding bead is one of the major factors influencing the quality and properties of the welding joint.
Mechanical properties of the weld joint can be improved [4] by introducing high-melting particles to the molten metal which increases the number of induced crystallization centers reducing the grain size during hardening [1, 2].
It has been known that one of the most important applications of WEE powders is modification of material properties.
The structure of the melting border and the arc heat-affected zone, A - Sample 1, B – Sample 2, C – Sample 3 The heat-affected zone in the samples cannot be precisely identified but it has a similar width for all the samples.
The influence of nanodispersed WC and nickel carbides on the structure and properties of deposited metal, Welding and diagnostics (Rus.

The test pieces were fired at 1175, 1200 and 1225°C and the physical-mechanical properties (firing shrinkage, flexural strength, and water absorption) were compared.
It could enhance all of the good properties at lower firing temperature.
Table 3 Rheological properties of the cast slurry.
Formulations Rheological Properties Density (g/cm3) Torsion viscosity (°Over swing) B1* 1.707 328 B2 1.714 325 B3 1.725 320 B4 1.706 328 B5 1.701 329 B6 1.706 330 B7 1.702 332 Physical-mechanical properties Firing shrinkage, water absorption and flexural strength depended on firing temperature.
Maiti, Effect of pyrophyllite on vitrification and properties of triaxial porcelain, Ceram.