Search results

The nonlinear characteristics of the phenomenon as well as the dependence of physical and mechanical properties with the temperature were considered in this work.
The thermal and mechanical behavior of the welding involves the knowledge of some data: the local high temperatures, the properties of materials as function of the temperature and the movel heat source.
In welding there are many factors that affect the type and magnitude of distortions, among them we can: process [7], forced heat [5], welding parameters [8], value and type of constraint [9,10], mechanical and thermal properties of the material [11] and joint and plate geometry.
This element is used for 3D structural modeling with constant or thermal dependent properties.
Using the alternative parameter in this work, the thermal distribution was concentrated in the welded metal, and showing a smaller heat affected zone.

Reasons for using this material include its optical properties, its high durability and its resistance to climatic effects.
The theoretical strength of glass is high, but the real strength is reduced by surface imperfections, which also affect the long-term corrosion and the mechanical properties of the material [2].
The basic properties of the soda lime float glass are stated in EN 572-1 [3], which specifies the chemical composition, the optical and mechanical properties.
If the material partial factors are not determined in the National Annex, the recommended values given in the European standards should be used.
[3] EN 572-1 Glass in Building – Basic soda lime silicate glass products – Part 1: Definition and general physical and mechanical properties

Effective measures must be taken to consider all these factors so as to make the analytical bearing capacity results consistent with the actual project.
These years, domestic and foreign scholars have done a lot experimental studies about the reticulated shell structural bearing capacity in which they used the numerical analysis method and the nonlinear fitting method to analyze, as a result the bearing capacity formulas and influencing factors of the complex reticulated shell structure were concluded in principle which just all attributed different types of defects to a safe magnification factor.
Bearing capacity calculation Due to the complexity of whole mechanical behavior, and the huge number of reticulated shell structural members, it is too difficult to analyze the mechanical properties separately, which made the finite element matrix displacement method commonly used.
In practical engineering, the most general defects that affect the overall bearing capacity of the reticulated shell structure is the residual stress, because of the initial stress what is related to the feature of the rods is hard to avoid in engineering design.
To a specific network shell structure, the imperfect construction quality causes geometric defects, in which the node installation deviation turn out to be the most common defect that affects the structural capacity of the reticulated shell.

The similarity regularities of thermal-mechanical effects are analyzed and discussed by means of FEM numerical simulation method.
List all important parameters affecting structure thermal-mechanical response and their dimensions.
Thermal-mechanical effects in the region of thermoelasticity for models with different scale factor have been simulated by finite element method (FEM).
The change of thermophysical properties of material with temperature must be considered.
Secondly, the stress, induced by thermal effect, has been quantified by solving the thermal-mechanical governing equations.

The chemical composition and mechanical properties are shown in Table 2 and Table 3.
Central segregation of steel cord is mainly caused by columnar crystal, while casting temperature is the key factor affecting the growth of columnar crystal[5].
The actual control situation of mechanical properties of LX70A rod for steel cord is shown as Table 5.
Because of higher content of sorbitic structure, the area fraction of as-rolled experimental steel is 88%-95%, which shows favorable mechanical properties and draw properties.
Typical inclusion shape of LX70A rod (5) Inclusion control of rod The quantity and shape of inclusion is a key factor affecting stranding and breaking of steel cord.

Effect of α2 Precipitation on Creep and Tensile Properties of Ga-Added Near-α Titanium Alloys T.
A balance between mechanical properties is important to develop high-performance alloys for practical use.
It is well known that these mechanical properties are also dependent on factors of microstructure morphology such as the volume fraction and size of equiaxed α, the thickness of lamellar, etc.
In this study, W was added to the alloys because NIMS is investigating the effect of W addition on mechanical and environmental properties, although W addition is usually avoided because W could be an origin of fracture, forming hard density inclusion.
Thus, the effective factors such as microstructure morphology including the formation of α2 precipitates and chemical composition are unsurprisingly different between the tensile and creep properties.

The mechanical, electrical and magnetic properties of the samples with different filler and reinforcement contents were determined.
Results of flexural properties have been shown in Table 3.
Flexural properties of different structures No.
Magnetic properties.
Another factor affecting the magnetic permeability is the average particle size and shape, whereas their effect is considered negligible compared to the loading of the magnetic filler [14].

These new exciting components significantly advance the medical applications range and diversity, creating the desired physical and mechanical properties.
The three hybrids mechanical properties and their synthetic route were established.
A number of mechanical properties, including hardness, flexural fatigue or flex life, softening temperature, toughness, elongation at tensile break are influenced by the molecular weight.
Since polymerisation times are so critical to the molecular weight and in turn the mechanical properties, ideally molecular weight calculation of the three hybrids would allow us to substantially quantify the varying molecular weights with the mechanical properties.
Conclusion The polymerisation conditions for hybrid biomimetic synthesis greatly influence the mechanical properties, due to the monomer and high molecular weight considerations.

Mihai Viteazul No.1 Brasov Romania acobuzatu@unitbv.ro, balexandru_orzan_1@yahoo.com Keywords: turning, surface roughness, influence factors.
Increasing the power and pressure on which the components of different machines are requested to function and the installations which needs materials with special properties like: high hardness, low surface finish, high resistance to corrosion, etc.; b.
The actual reality confirms the fact that the machining process is and will remain for a long time the principal method of execution of the pieces with different functional properties.
Conclusions From the theoretical and experimental research from this paper it can be take out the next important conclusions: - Practical the roughness from the turning process and also from the others machining processes, it is influenced by others factors than the geometrical ones: plastic deformation of the material for machining, turning speed, cooling liquid used, etc, such as the values obtained with analytical formulas Eq. 3 and 4 which are indicative for the activity of technological roughness
Buzatu, Contributions at the study for the factors that are effecting the increasing of the precision of the exterior turning and rectified machined pieces (in Romanian), Ph.D. paper, Transylvania University, Brasov, 1981

Based on this assumption there is no need to assign its mechanical properties and thus, only thermal properties were defined.
Four factors are expressed as A, B, C and D, respectively.
Table 1 Factors and levels of cutting force Levels Factors A v(m/min) B f(mm/r) C λ(°) D β(°) 1 180 0.06 8 10 2 220 0.09 10 13 3 260 0.12 12 15 4 300 0.15 14 18 The interaction between factors was not considered in this experiment.
Cutting force affects directly the amount of cutting heat and further impacts on tool wear, the accuracy of works.
In addition to affect significantly cutting force, feed f is also closely related with the processing time.