Search results

Many factors influence finishing quality and efficiency in centrifugal barrel finishing, including processing conditions, equipment, media and technological parameters and so on[10,11].
Table 1 The parameters of the Media Properties Al2O3 SiC Density[kg/m3] 3965 3100 Poisson’s ratio 0.2 0.4 Shear modulus[Pa] 3*1011 2.09*1011 Table 2 Orthogonal experiment scheme level Factor Diameter [mm] A Material B 1 A1 =4 B1 = Al2O3 2 A2 =9 B2 = SiC Results and Discussion The velocity analysis of media.
The normal force mainly affects the normal motion of the media and the grinding depth, and ultimately affects the surface roughness of the workpiece.
The tangential force mainly affects the tangential motion of the media and ultimately affects the uniformity.
Fig.7 The Normal Force of 9mm SiC and 9mm Al2O3 Fig.8 The Tangential Force of 9mm SiC and 9mm Al2O3 The normal force, tangential force and rolling friction (omit the figure) of the media are given in Table 3 by analyzing comprehensively Fig.5-Fig.8, The main factors of the force can be analyzed through statistics method using orthogonal experiment analysis (Table 4).

The amount of solder and the size of solder are selected as the two quality properties.
Three levels are defined for the three control factors.
We select four factors as the essential factors affecting the quality control.
The quality characteristics related to the control factors are revealed.
Conclusion After the analysis of response surface method, the essential factors which affect the manufacturing process can be found.

A laminated plate with excellent mechanical properties is commonly used for a bulkhead part in which the interface structure of diffusion bonded is detrimental to the bending quality.
Laser cladding of metals is known to be capable of producing large area bonding between metal plates, including couples of those with grossly different mechanical properties.
The main parameters affecting the height of transition zone are the process speed and laser power.
Table 4 listed the mechanical properties of SCLP.
Guo, et al, Interfaces of titanium-aluminum clad sheet and affecting to processing performance, Xiyou Jinshu. 35 (2011) 342-348

Fibers Properties.
Firstly, the fiber was examined for its physical and mechanical properties as single fiber.
Properties of single ramie natural fibers.
The various type of this failure strongly influenced by the geometric, mechanical and surface properties of each single fiber [8].
"Influence of natural long fiber in mechanical, thermal and recycling properties of thermoplastic compositesin automotive components."

Introduction Hardness is one of the most widely used and promising characteristics which allows assessing the mechanical and operation properties of metallic materials and structures.
The impact of some factors on hardness tests results has been studied in detail.
At the same time, the issue of the relationship between residual stresses and hardness values remains highly relevant, especially when studying the mechanical properties of welded joints.
Peshek, Determination of Mechanical Properties of Materials by Micro Indentation: Modern Techniques, Moscow State University, Moscow, 2004
Borodavkina, Effect of electron-beam welding speed on weld metal mechanical properties of 5V titanium alloy, IOP Conference Series: Materials Science and Engineering. 969 (2020) 012095

As a control group for elastic properties of polymer scaffolds, rigid poly L-lactide scaffolds were fabricated.
However, these polymer scaffolds have rigid mechanical properties which result to fibrous cartilage formation [3].
That means compressive mechanical stimuli are very important factor in tissue engineering of regenerative cartilage [4].
To investigate the elastic mechanical properties of scaffolds compared with native cartilage, compressive mechanical tests were performed with a 50-Newton-maximum load cell at a cross- head speed of 0.1mm·min -1 using an Instron (Model 5567, Canton, MA).
Consequently, in vitro systems, namely in static environments without mechanical stimulations, the cell growth and ECM secretions of chondrocytes were not affected by intrinsic mechanical properties of polymer scaffolds

The fatigue crack growth characteristic is an important property for the integrity assessment of hydrogen utilization machine.
Each specimen was fatigue tested under different nominal stress amplitude and fatigue crack propagation property was obtained by gathering all data.
Name of material Heat treatment condition HV SCM440H-VQT Vacuum quenched at 1163 K, tempered at 443 K 602 SCM440H-QT Quenched at 1143 K, tempered at 843 K 334 SCM440H-A Annealed at 1143 K 208 S45C-HQT Quenched at 1133 K, tempered at 673 K 437 S45C-QT Quenched at 1133 K, tempered at 833 K 228 S45C-N Normalized at 1143 K 179 S25C-N Normalized at 1143 K 129 A286 Solution treatment at 1253 K, precipitation hardened at 993 K 390 Chemical compositions ( mass % ) Mechanical properties ( MPa, % ) Material C Si Mn P S Ni Cr Mo Cu σy , σ0.2 σB δ φ SCM440H-VQT 0.40 0.18 0.81 0.018 0.015 0.06 1.09 0.15 0.08 1450 2033 13 38 SCM440H-QT 911 1025 21 59 SCM440H-A 0.42 0.22 0.80 0.017 0.020 0.03 1.04 0.16 0.02 417 768 42 39 S45C-HQT 1227 1313 11 50 S45C-QT 573 786 27 62 S45C-N 0.45 0.18 0.82 0.011 0.022 0.04 0.15 - 0.18 461 689 28 53 S25C-N 0.27 0.17 0.46 0.016 0.018 0.03 0.12 - 0.03 295 492 34 57 Table 2 Chemical compositions and mechanical properties
As shown in Fig. 2, SCM440H-VQT, SCM440H-QT and S45C-HQT were significantly affected by hydrogen.
A286 was also affected by hydrogen which indicates that martensitic structure is not the necessary factor for the ∆Kth reduction by hydrogen.

As one of the most common type, torsional fatigue properties are normally calculated from the rotating bending fatigue properties.
In addition, torsional fatigue properties are normally calculated from the rotating bending fatigue properties.
Firstly, the specimens were cut out from round bars (Φ25mm), and then they were normalized (990°C, 2hrs, twice), and the main mechanical properties of the test materials are listed in Table 2.
Mechanical properties σY [MPa] σB [MPa] ψ [%] 360 633 54.4 σY, Yielding stress, σB, Tensile stress, ψ, Reduction ratio of area Table 1.
The density of tensile slip lines during the pre-strain may be one of the effect factors for the strength improvement.

Through compression molding, the effects of some parameters on material’s mechanical properties were studied to optimize the technical process, including the ratio of wood fiber to starch, the content of adhesive and foaming agent.
The principal factors were that the ratio of wood fiber to starch was 1:1,1:2,2:3, the content of foaming agent was 0%-9%, the content of PVA was 6%-12%.
The product size was 150*150*30mm.The experiment were two four-level and one three-level factors, and the mixed level uniform design U12（3*42）was adopted in it.
Density [g/cm3] Fig.2 Effects of Factors on Density Compressive strength[MPa] Fig.3 Effects of Factors on Compressive Strength Test optimization and verification.
The fitted regression mathematical model can significantly predict main physical and mechanical properties of cushion packaging materials.

The influence factors of perform porosity were investigated, including process pressure and raw materials.
The average porosity of porous performs with different type of diamond Open porosity and the influencing factors.
On the contrary, extremely large open porosity will lead to a great amount of unreacted Si remain in the matrix [18], which will result in the sharp decline of the thermal conductivity and mechanical properties of the Diamond/SiC composites.
Main factors effected the open porosity of perform were pressing pressure as well as content, morphology and particle size of diamond.
Zhang, et al., Mechanical and tribological properties of 3D carbon fiber rein- forced SiC composites prepared by liquid silicon infiltration, Key Eng.