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Online since: June 2005
Authors: Cheol Ho Lim, Ki Tae Kim, C.H. Lee, Young Sup Lee, Yong Hwan Kim, Dong Choul Cho
In the powder metallurgy, even if material was chosen, the carrier mobility and thermal transport property is changed by several factors such as pore, particle boundary and oxide layers.
Thermoelectric properties of the spark plasma sintered samples.
Bi2Te3-based single crystals show anisotropy in thermoelectric properties.
Anisotropy of thermoelectric properties.
Such anisotropy of thermoelectric properties is also confirmed from XRD pattern.
Online since: October 2015
Authors: Marek Kočiško, Radoslav Krehel', Denisa Krchová
The purpose is to determine the actual status of the object based on objective evaluation of signs detected thanks to measuring techniques, prediction, conditions and properties of the device used in service, detecting the degradation factors, which could lead to malfunction.
The temperature is an important factor that affects the wearing of the cutting tool´s wedge.
It should be realized that every second product that is purchased is affected by parameters of turning tool that the component was turning.
The worn a new cutting tool by their parameters (durability, quality, performance) affect the result of the machining process up to 90%.
Paško, Influence of technological factors of die casting on mechanical properties of castings from silumin, Lecture Notes in Electrical Engineering 240 (2013) 713-722
Online since: December 2019
Authors: Marina Tabanyukhova
This method relates to non-destructive testing methods and is based on the property of double refraction (optical anisotropy), which is observed in some isotropic transparent materials in the stress state.
However, the study obliged to be carried out not on the real, but on the model material, which reflects the actual properties of the materials only in the elasticity [9].
Based on the study, it can be concluded that the stress state of the element is affected by the location of the cut, the angle of its inclination and the distance from the other cracks-cuts.
[6] Handa D, Dondapati R S, Usurumarti P R 2017 Investigation on the stress concentration in metallic flat plates due to holes with different configurations International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 7 P. 1718–1725
[10] Albaut G N, Pangaev V V, Tabanyukhova M V and Kharinova N V 2005 To the problem of the stress intensity factors determination in the elements of building structures Izvestiya Vuzov.
Online since: July 2011
Authors: Rachid Ellaia, Norelislam Elhami, Mhamed Itmi
However, the designer reduces the structural cost without taking into account uncertainties concerning material properties, geometric dimension and loading.
In Deterministic Design Optimization (DDO), the system safety may be taken into account by assigning safety factors to certain structural parameters.
Suitable geometry, material properties and loads are assumed, and an analysis is then performed to provide a detailed behavior of the structure.
Low reliability level: when choosing small values of safety factors or bad distribution of these factors, the structural reliability level may be too low to be admissible.
In the structural analysis of engineering design, there exist uncertainties in loading, material properties, geometry, and environmental conditions.
Online since: September 2016
Authors: Yu Chen Fu, Zongjin Li, Xiang Peng Cao
Fig.4 Finished new layers of MKPC powder Traditional method for making MKPC involves local vibration compaction during the period of filling the mould, the procedure of vibration will eliminate the air from the MKPC paste thereby reduce the porosity of MKPC specimen and finally the mechanical properties will also be improved such as compressive strength and flexure strength.
Therefore, the printing speed and penetration property of MKPC system are the key factors influences the w/c ratio.
These parameters are vital influences in producing MKPC through binder jetting system as well as mechanism properties of printed MKPC specimens.
Except for the difference of compaction method in binder jetting system and Casting method which discussed before, the mixing method is also the key difference in making MKPC. binder jetting system only utilize dry mixing due to the deposition requirement of fabrication while the casting method apply dry powder mixing and wet mixing together to get final product and the mixing difference is also the key factors in affecting the mechanism properties of MKPC.
Panyathanmaporn, Influence of raw powder preparation routes on properties of hydroxyapatite fabricated by 3D printing technique.
Online since: October 2025
Authors: Mohammed Benyahia, Fayçal Bouzit, Mohamed Bouzit, Abderrahim Mokhefi
These elastic structures interact with the fluid dynamics, affecting recirculation zones and flow separation downstream of the BFS.
By investigating the influence of various parameters, such as the elasticity of the fin, their positioning, and their length, this study seeks to enhance comprehension of how these factors affect fluid flow rates and thermal behavior.
The fluid flowing within the conduit is the air, while the thermophysical properties are listed in Table 1.
Thermophysical properties of air and steel at 20°C [52].
In fact, the maximum displacement occurring just below the top of the fin is attributed to the interplay between fluid dynamics and the mechanical properties of the fin.
Online since: May 2009
Authors: Shi Chao Xiu, Peng Bo Xiu, Shi Qiang Gao
Until now, it has not been solved enough for the thermal properties of the hybrid journal bearing with super-high speed.
Because the heat is generated mainly from the oil film in the bearing, the characters of the temperature field of the oil film are the key factors to investigate the thermal properties of hybrid journal bearing.
As the main object to study, the liquid and its flow direction are the key factors to build the geometric model of the oil film.
(4) Defining the material properties.
Otherwise, the various material properties may also be defined as the functions of temperature considering demands.
Online since: March 2015
Authors: Jin Gang Gao, Lei Yu, Yu Zhuo Men, Hai Bo Yu, Xiao Dong Yang
Also, the centrifugal force may, through the steering mechanism, be delivered to the steering wheel, making the latter shake and thus influence seriously the dynamic and static properties of the car.
Under these circumstances, to minimize the effects of artificial factors on measurement result, a highly effective and smart detection approach is required for wheel hubs produced in bulk so that to guarantee the conformity and precision of detection result[4,5].
(2) Analysis on Measured Radial Run-outs Data obtained by the portable wheel run-out tester and figures drawn accordingly show the first harmonic with relatively great amplitude while other harmonics with very small ones, which means that eccentricity is a main factor affecting the stability of wheels.
We can then enhance the precision of detection from the influencing factors: frame stiffness, live spindle and the repeated accuracy of localization clamps, precision and installation error of the radial and axial laser displacement sensors used to measure the wheel.
Data of some actual wheel outline was collected by the detection equipment and analyzed based on factors contributing to radial and axial run-out errors.
Online since: August 2024
Authors: Wei Ting Hsu, Shu Ti Chung
This study aims to facilitate angle steel analysis to align more closely with the physical and mechanical applications.
The width-to-thickness ratio is a crucial factor affecting the load-bearing capacity.
βw = section property for single angles about major principal axis, in.
This behavior may be attributed to the influence of β_w and cross-sectional properties.
Summary Study analyzes nine different angle steel sections, considering their properties, the impact of calculation formula parameters, and component length.
Online since: October 2011
Authors: Wei Ping Luo, Man Hua Chen, Jun Wang
Analysis Principle of Kinematics Based on Multi-body System Theory In the field of mechanical processing manufacturing, some parts of the elastic deformation should be considered in the dynamic analysis of high speed and high precision machine tools.
Fig.1 Description of flexible body From the Lagrange equation with multiplier, we get the flexible body motion differential equation: (1) where,M is the flexible body mass matrix;K is the generalized stiffness matrix of a structural member which is corresponding to coordinate q in modal system;fg is gravity;D is the symmetric matrix which is constituted by damping coefficients ,ξis the generalized coordinates;Ψ is the constraint equation;λ is the constraint Lagrange multiplier; and Q is the force applied in the ξprojection The Establishment of The Machine Dynamics Model Five-axis CNC Machine tool is a complex mechanical structure.
Its structural dynamic is one of the key factors which affect machine performance.
In order to reduce the influence of the flexible effect on the dynamic property of the system, it is necessary to improve the original structure of column[2].
Journal of Mechanical Strength,2006,,28(2):287~291(in CHINESE) [3] NI Xiang-yang.
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