Search results

In the cold roll-beating process, the mechanical property is determined by the microstructure of the parts, and the quality of the forming parts is closely affected.
When 40Cr is in high speed, large deformation impact process, the material exhibits a wave-like fluctuation; this is essentially due to the microstructure change of the material under the influence of the macro factors---deformation temperature, deformation rate, deformation degree.
There are many factors affecting the flow stress in high-speed large deformation.
However, the factor of flow stress curve is affected by the evolution of organization of the material in the deformation process.
Da, Influence of Dynamic Recrystallization on Tensile Properties of AZ31B Magnesium Alloy Sheet, Materials and Manufacturing Processes, vol. 25, no. 8, pp. 880-887, August 2010

From the force analysis about the blends, there are three structure factors about rotor effecting the mixing process, such as the wedge angle θ of the rotor’s cross-section, the helix angle β of the rotor’s wing and the length of the wings.
When is too small, the shearing effect will be weak; on the other hand, the large macromolecular chains of rubbers and plastics will be broken, the physical and mechanical properties of the vulcanizate would be decreased.
From the above analysis of the forces, there are three factors influencing the mixing performance considered the configuration of the rotor. 3.
The effect of the rotor’s helix angle ß for the mixing From the above force analysis , the helix angle ß should affect the axial force only.
In this article, on the base of the force analysis for the compounds in the mixer chamber, there are three structure factors about rotor effecting the mixing process, such as the wedge angle θ of the rotor’s cross-section, the helix angle β of the rotor’s wing and the length of the wings.

Secondly, in the application environment of cement-based materials, factors such as humidity and cracks may affect electrical conductivity.
It has many extraordinary properties.
However, the addition of an appropriate number of nanofibers can improve the mechanical properties of concrete[51].
Doped nanoscale conductive materials can effectively fill pores and improve the mechanical and electrical properties of cement[54].
Deng, Influence of electrochemical oxidation of carbon fiber on the mechanical properties of carbon fiber/graphene oxide/epoxy composites, Compos.

Designing pine furniture not only depends on the appearance of pine timber, but also on its material properties.
Effect of Pine’s Properties on Design The material is the soul of design.
Hence, a designer’s ability to design is determined to a large extent by his capacity to understand the material, its appearance, its physical and mechanical properties, its decorative uses, and its performance during processing [2].
This variation can be considered as a factor in form design.
These differences are due to the different properties of these types of materials.

However, the segregation of Mg may adversely affect the performance of these materials if they are exposed to rapid heating and cooling environments such as resistance spot welding.
The formation and migration of vacancy is an important factor affecting Mg segregation.
Al-Cu, Al-Mg, and Al-Mg-Si) or impurities, high solidification shrinkage, large coefficient of thermal expansion, and a rapid drop of mechanical properties at elevated temperatures (Welding Handbook [3], Anik and Dorn [4]).
Besides the numerous vacancies, another possible factor of cracking is pipe diffusion which can be used to explain the phenomenon that cracking produced by spot welding AA5754 didn't start at a fusion line.
[2] ASM Metals Hand Book, Properties and Selection: Nonferrous Alloys and Special-purpose Materials.

Study has shown that an external magnetic field can improve tribological properties of ferromagnetic materials, and have an impact on paramagnetism materials and anti-magnetic materials [2, 3].
The introduction of electromagnetic field in the friction-abrasion testing machine attracts wear debris and lubricates particles, which affects friction and wear process directly, and affects the microscopic behaviors of the friction and wear process.
Table 1 lists the properties of the two materials.
(2) In the coupling process of electromagnetic induction heat and mechanical friction heat, when the stress and rotational angle are constant, the change of coupling temperature will be affected by the electromagnetic induction frequency, the linear velocity and other factors.
Electro-Mechanical Engineering, 27(3) (2011), p. 53 (In Chinese) [2] M.

Introduction The friction stir process is major interest of welding of aluminum since it improves the joint properties.
In addition, extensive softening will occur in the HAZ, thus lowering the mechanical properties.
Defect free welds with good mechanical properties have been made in a variety of aluminium alloys, even those previously thought to be not weldable with conventional methods.
There have been a lot of efforts to understand the effect of process parameters on material flow behavior, microstructure formation and hence mechanical properties of friction stir welded joints.
In order to assess the influence of factors on the response, the means and Signal-to-Noise ratios (S/N) for each control factor were calculated.

The cutting force is the key factors influencing the processing precision and efficiency in special-shaped stone production.
The cutting force is the key factors influencing the processing precision and efficiency in special-shaped stone production.
So the cutting force affects the processing precision, the tool life and the processing cost.
The main composition and physical properties of the granite are shown in Table 2.
Table 2 Main composition and physical properties of the granite Main composition (%) Physical properties SiO2 Al2O3 CaO MgO Na2O K2O Compressive strength (MPa) Bending strength (MPa) Shore hardness (HS) 49.6 16.8 10.4 9.2 3.7 8.8 262.2 27.1 81 The cutting parameters are shown in Table 3. ap is the cutting depth, which is constant. f is feed rate in mm/s. v is the peripheral speed of the cutter in m/s.

The testing of the physical and mechanical properties of the testing sample is based on the GB/T 8815-2002 [1] standards, and the testing of the environmental protection properties of the testing sample is based on the IEC 62321ED.1111/54/CDV standards.
To obtain good electrical insulation properties and good physical and mechanical properties for the sheathing compound, we need to choose high efficiency plasticizer with good thermal stability and low volatilization rate.
Considering various factors the appropriate amount of environmental stabilizer added should be about 6.8 Phr.
Table 4 shows that the low-temperature impact property was affected greatly by the amount of the calcium carbonate added.
Properties of the cable sheathing compound.

The physical and mechanical experiment in laboratory Analysising open-pit mine stope slope stability，requires test physical and mechanical parameters to stope rock sample [2]。
Through the rock mechanics experiment which has done in rock mechanics laboratory，rock mechanics analysis was carried out on the rocks, obtaining rock physical and mechanical properties, as the Table1。
We can get from the picture that gravity affects the distribution of stress.
Analysis on Safety Factors of Open-pit Slope Stability[J].
Preliminary Analysis of Rock Brink Stability Factors in Opencast Quarry [ J] .