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So as to improve its mechanical properties, the section steel is added in the shaped reinforced concrete columns.
The numerical method was adopted in this article to compile a computer program[3] of full-range nonlinear analysis which can be used for the further research on the mechanical properties of steel reinforced concrete cross-shaped columns (SRCCSC) subjected to biaxial eccentric compression.
Factors affecting sectional curvature ductility Influence of loading angle.
Influence of other factors.
Therefore, the load angle ,axial compression ratio ,the ratio of stirrup spacing and the diameter of longitudinal reinforcement ,are all the major factors affecting the SRCCSC subjected to biaxial eccentric compression, meanwhile, the curvature ductility coefficient and a, n, s / d meet certain numerical relations.

Fracture initiation is a key factor of hydraulic fracturing, as lack of research on fracture initiation position.The perforation geostress mechanical model of low permeability reservoir is built according to the rock mechanics, seepage mechanics, elastic-plastic mechanics, considering solid-fluid coupling and rock material nonlinearity.
Facture initiation is a key procedure affecting the fracture success.
Instance validation In order to verify the correctness of the method and theory, simulating and calculating fracture initiation pressure of Daqing well Ao 332-32, and its formation parameters and mechanical properties of rock are shown in Table 1, the fracturing operation curve is shown in Fig. 4.
Table 1 The rock mechanical properties of AO 332-32 well Permeability / Elasticity modulus /MPa Poisson ratio Internal frictional angle /0 Extent of porosity /% cohesion /MPa Initial geostress /MPa 16.6 2.996E+04 0.25 450 16.9 8.23 30 22 19 Fig. 5 Distributing nephogram of maximum principal stress around the perforation area Fig. 4 Fracturing operation curve of AO 322-32 well The actual fracture initiation pressure of wellhead is 35 MPa from operation curve.
The distribution and magnitude of pore pressure directly affect the position and pressure of fracture initiation, therefore, the following will focus on how the distribution of transient pore pressure around the perforation affects fracture initiation.Using the method abvoe, calculation results and fracture initiation pressure is shown in Table2 .

This will help to understand the effect of crystallization conditions on the structure and mechanical properties of triblock TPUs.
All these factors limits direct interpretation of IR-spectra in terms of hydrogen bonding and phase separation.
The numbers correspond to the sample numbers in Table 1 The degree of crystallinity and the structure of the crystal phase affect the mechanical properties of adaptive materials.
The most critical factors are degree of crystallinity and interface between soft and rigid block formed by corresponding polyol and diisocyanate.
Peng, Thermo-Mechanical Properties of Glass Fiber Reinforced Shape Memory Polyurethane for Orthodontic Application, J.

Introduction and state of the art Titanium alloys present many interesting mechanical properties (such as very high strength to weight ratio, high toughness, biocompatibility and good corrosion resistance) that promote the use of these materials not only in the aerospace industry, but also for bio-medical applications and for the chemical and oil & gas industries.
Furthermore, the mechanical properties of the as-received materials can be considered quite homogeneous along the bar diameter, since the material is annealed and since a micrographic analysis has shown that the microstructure is substantially uniform across the cross section of the bars (Fig. °1).
In Table 2 the properties of the tested inserts are listed.
Temperature curve for the three inserts Results and discussion In this section the effects of the investigated factors are analysed and critically discussed.
In a way similar to what already shown with the aid of Table 5, the statistical significance of the factors has been tested with F-tests.

The ability to produce intricate profiles on materials irrespective of the mechanical properties made this process to be widely used in industries.
Nihat Tosun [2] in an attempt to find the effect of cutting parameters on performance of WEDM found out that the significant parameters affecting surface roughness are open circuit voltage and pulse duration.
And the significant factors affecting surface roughness are pulse on-time and open voltage.
In their study, they employed ANOVA to identify the significant factors.
Taking into consideration that peak current and pulse on time are the two most significant factors affecting surface roughness (by ANOVA results), it is necessary to understand their part.

The aimed of this research is to determine the feasibility and effect of the mixture of the shielding gas in the physical and mechanical properties.
The measured of mechanical properties with regard to strength, hardness and toughness using, tensile test, bending test, Vickers hardness Test, and Charpy impact test respectively.
The physical properties examined with optical microscope.
Introduction The Study for The Maritime Traffic Safety System Development Plan reports that in the year 2007-2011 the percentage of the factors causing the sea accident caused by technical factors is 59%.
The composition of shielding gas and filler wire in GMAW of HSLA steels determines inclusion characteristic, microstructures, and mechanical properties [4].

It is widely recognized as a high-quality material due to its excellent properties and versatility, especially in terms of mechanical, durability, and thermal properties [3–5].
Results and Discussion Effect of UV Light Exposure on Mechanical Properties.
It was obtained that the addition of CR affected the mechanical properties of PU because chlorination treatment on rubber could increase the surface energy of the rubber.
This illustrates that the sample began degrading, resulting in a decrease in mechanical properties.
The morphology and chemical structure characterizations showed agreement regarding the improvement in the mechanical properties.

One of the most appreciated features of a great many of compounds of this class is an ability to change physical properties when being affected by a number of factors (e.g. resistance variation depending on application of certain substances).
One of the most appreciated features of a great many of compounds of this class is an ability to change physical properties when being affected by a number of factors (e.g. resistance variation depending on application of certain substances).
Again, these parameters may be varied subject to synthesis conditions with a view to obtain materials with desirable properties [2].
Samples 1, 2, 3, 4 responded to ammonia, thus exhibiting their gas-sensitive properties.
//An experimental and quantum mechanical study on electrochemical properties of N-substituted pyrroles/ Journal of Molecular Structure: THEOCHEM 857(2008). 95–104

Introduction Steel - concrete composite box girder bridges, its excellent form structure, reasonable structure and layout, give full play to the mechanical properties of tensile strength and compressive strength of concrete steel[1-2].In recent years it fully meets the modern long-span bridges, high performance and aesthetics requirements, and thus has been rapid development.
The stability of the structure of the portfolio, but lagging behind the design process more research and design experience using all-steel box-shaped bridge, to make the stiffening ribs set quite reasonable[3-4].In this paper, using the finite element method to analyze the box girder transverse stiffening ribs under different circumstances affecting the setting of structural stability were studied.
As can be seen from the two formulas, when the transverse stiffening ribs density increases, the critical buckling load factor and will have improved to some extent, but it does not increase in a linear form, which is a box girder transverse stiffening ribs on affect the structural stability provides a theoretical basis and foundation.
Table 1 Material properties: Table 1: Unit Material Properties Element material properties Parts Material Elastic modulus(Mpa) Poisson's ratio Density (Kg/m³) Beam Q370qD 2.1×104 0.3 7849 Stiffeners Q345B 2.1×104 0.3 7849 Panel C50 3.45×104 0.167 2500 Constraints: The bearing fixed hinged; side mount bracket using two-way form of constraint box girder vertical and lateral displacement.
Weight load is: weight after a bridge full bridge all members; lane load: load by 1.3 times to add highway, four lanes calculations, single-lane loading 13.65KN / m, driveway coefficient 0.67, power factor 1.05 [7].

Flow properties through a single rock fracture are the foundation of researching fluid flow in fractured rock masses.
Flow properties of single fracture are the basis of studying that of fractured masses.
Thus, normal stress has obvious effect on flow properties.
Influencing factors Roughness and relative position between two surfaces are two main influencing factors of aperture.
Theory foundation is lack to predict flow properties of larger shear displacement based on flow properties of lower shear displacement.