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Online since: January 2013
Authors: Rong Jin Huang, Zhen Chen, Yuan Zhou, Min Zhou, Ye Mao Han, Lai Feng Li
In recent years, it has been reported that dispersion of fine ceramic particles or nano-particles into thermoelectric materials can improve the Z value by decreasing the lattice thermal conductivity without adversely affecting the electrical conductivity [9-13].
The thermoelectric properties were measured in the temperature range from 77 K to 300 K.
Wolfe, Thermoelectric properties of bismuth-antimony alloys, J Appl Phys. (1962) 33841-33846
Liu, Thermoelectric and mechanical properties of nano-SiC-dispersed Bi2Te3 fabricated by mechanical alloying and spark plasma sintering, J Alloy Compd. 455:1-2 (2008) 259-264
Tang, Synthesis and thermoelectric properties of CoSb3/C60 composites, Acta Phys Sin-ch Ed. 53:5 (2004) 1469-1473
Online since: October 2013
Authors: Jin Guang Zhang, Xun Chao Wang, Tao Ke, Xiang Long Wen
The number of rings and the interference affects the mechanics property of the multi-ring flywheel.
So the thickness of the composite on the edge is 90mm, and the mechanical property parameters of the T300/5208 carbon fiber composites areGPa, GPa,MPa,MPa,MPa,kg/m3, .The centrifugal stress of the composite flywheel at 40kr/min has shown in figure 3.
The Tsai-Wu criterion failure factor of the flywheel can be achieved by calculation.
Fig.4 The distribution of the radial initial stress of the flywheel Fig.5 The Tsai-Wu criterion failure factors of the flywheel at the speed of 40 kr/min.
Tutuncu, Effect of anisotropy on stresses in rotating discs, International Journal of Mechanical Science, l995, 37(8):873-881
Online since: March 2017
Authors: Dashnor Hoxha, Naima Belayachi, Marouen Slaimia
The risk of moisture accumulation is dependent on multiple factors including weather conditions, exposure to driving rain and wind, orientation, material properties and air permeability.
The presence of an insulator affect in a significate way the heat flow across the wall.
Shen, « Physical and chemical properties of flax fibres from stand-retted crops desiccated at different stages of maturity », Ind.
Al-Mukhtar, « Thermo-Mechanical Behaviour of an Innovant Straw Lime Composite for Thermal Insulation Applications », Appl.
Künzel, « Factors determining surface moisture on external walls », in Proceedings of the XI International Conference Thermal Performance of the Exterior Envelopes of Whole Buildings, 2010, p. 1–6
Online since: August 2013
Authors: Kai Cui, Bang Wen Huang
Meanwhile, for the sample without or less hydrophilic mineral, cohesive force is affected mainly by water content, and for the sample with large content of hydrophilic mineral, water content and dry density affect cohesive force together.
For a certain sample, the variation of moisture content and dry density affects internal friction angle less, while affects cohesive force more.
Since the triaxial test of unsaturated soil is more complicated, longer and more influential factors than saturated soil, the test has a research on the shearing strength and the influential factors of the three typical unsaturated mixed-soil from west Sichuan by using the SWCC got from former test and converting the test into conventional undrained triaxial test through controlling the water content of soil indirect.
For the soil which contains less or a little hydrophilic mineral, water is the main factor which has effect on the cohesion.
Chinese Journal of Geotechnical Engineering (2001), p. 412 [5] FUTAI, M.M., ALMEIDA, M.S.S: An experimental investigation of the mechanical behavior of an unsaturated gneiss residual soil.
Online since: November 2012
Authors: Siavash Sarrafan, Alireza Akbarzadeh
Repeatability versus accuracy Input and Output of the Problem In this paper, the two input parameters affecting the dynamic behavior of the robot are link length and link mass.
These two variables can be used by robot controller to affect its locomotion.
It should be noted that length and mass are for properties of each link where as α0 and s are used for the entire robot.
The x-axis of these two figures represents the 5 levels for each of the four input factors.
Seireg: Journal of Mechanical Design (1990), p. 501
Online since: March 2013
Authors: Ji Shi, Yoshio Nakamura, Abdulloh Rifai
Thin metal films are prone to residual stress which is developed during thin film formation and growth and influenced by external factors.
Instead of observing its electrical properties, it also becomes necessary to study its morphology and residual stress since they will affect the functional properties.
Lee, et al. who studied the mechanical properties of Al/AlN multilayer thin films, reported that measurement result on residual stress showed Al layers were subjected to compressive stress which was induced by the interface which caused overall increase of the compressive stress in the multilayer thin films [7].
Mechanical Properties of Thin Films and Multilayers.
Mechanical and Adhesion Properties of Al/AlN Multilayered Thin Films.
Online since: November 2013
Authors: Raj Das, Nathaniel James Burbery
There are many unique properties and mechanical characteristics which can only be observed in polymeric nanofibrils [1].
Other properties include sufficient mechanical durability to enable prolonged functionality, high strength, and a high degree of nanoporosity [2].
These materials are well-suited to aerospace, automotive and marine applications, which require a balance of good mechanical properties and lightweight [1].
Useful properties include high mechanical performance, UV protection, anti-microbial properties, electrical conductivity and thermo-regulation (by trapping heat to maintain thermal equilibrium) [21].
Summary By understanding the trends occurring in the field of electrospinning, it is possible to fully exploit the versatility, exceptional mechanical properties and unique functional properties of polymer nanofibrillar materials.
Online since: February 2011
Authors: Franco Bonollo, Giulio Timelli, Emilia Della Corte
Introduction The possibility of combining different properties in one material, extending the field of use, has been achieved, and it is steadily improving, with metal matrix composites (MMC) [1].
Important factors affecting the final cost of the material are the type of reinforcement and the process technique.
In the present work, the intensity of mechanical mould vibration is given in units of gravity.
This temperature uniformity will result in a more homogenous microstructure and properties.
[22] DURALCAN, in: Composites for High-Pressure die casings: Mechanical and Physical Property Data.
Online since: September 2021
Authors: Abdul Razak Abdul Karim, Norazzlina M. Sa’don, Nur Amalina Hilwane
Stabilization incorporates the various methods to modify the properties of a soil to improve its mechanical properties.
Mechanical Properties The mechanical laboratory testing was conducted on the peat reinforced with various percentages of rubber chips (RC) at two different sizes and 5% cement content.
Compaction improves the mechanical properties.
The addition of cement induces a hydration process which reacts with water, thus affecting the dry density of the soil.
This is due to the fact that peat is a highly organic and tend to have poor mechanical properties.
Online since: April 2011
Authors: Yi Mei, Fang Ping Wang, Qiao Ying Liu, Yu Tao Mao
And the thermal load is an important factor that controls box deformation to ensure the accuracy and reliability of heavy gear transmission, which can not be ignored.
Heat leads to the components temperature raising and large hot deformation, and gears engage accuracy is affected, then the force on gears engage surface is not homogeneous, it will cause many problems such as driving failure, low reliability, etc [3, 4].
Conclusion The paper established finite element model for heavy mechanical gearbox, and used NASTRAN analysis software to carry out numerical analysis on thermal characteristics.
Mechanical Design and Manufacturing,Vol. 25 (2009) No. 3: p.141
Wind power gear box casing thermal analysis of structural properties(MS Dalian University of Technology,China 2009),p.35-44
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