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Online since: December 2024
Authors: Pranut Potiyaraj, Patrapee Kungsadalpipob, Siriporn Wu, Chuanchom Aumnate
Key characteristics such as flexibility, compatibility, high stability, and high sensitivity are critical factors that influence their performance [4].
Among these, TPU, a biocompatible block copolymer composed of soft segments (long polyethers) and hard segments (short sequences), stands out due to its excellent mechanical properties, such as flexibility, elasticity, and abrasion resistance [10].
However, TPU is inherently an electrical insulator, which poses limitations on its electrical properties [11].
The electromechanical properties of 3D-printed samples after ultrasonic cavitation-enabled treatment and thermal-assisted method.
Potiyaraj: 3D printable resin/carbon nanotube composites for wearable strain sensors: Enhancing mechanical and electrical properties, Journal of Science: Advanced Materials and Devices, https://doi.org /10.1016/j.jsamd.2023.100546 [12] I.
Online since: July 2013
Authors: Sara Casciati, Fabio Casciati, Li Jun Wu
Non-contact displacement sensors should be preferred since they do not change the system properties.
The displacement is measured in pixels which can be converted into the traditional units by multiplying by scaling factors [11].
When carrying out the experiment with the optical axis of the camera perpendicular to the motion plane, the scale factor is calculated to be 2.3 mm/pixel.
In this case, the markers in the interested plane are not at the same depth of the field which will be projected to the image according to different scale factors.
Mechanical Systems and Signal Processing, 24(5) (2010) 1369-1382
Online since: December 2016
Authors: Pavel Svoboda, Adam Konvalinka, Jaroslava Koťátková, Jan Zatloukal, Elena B. Cherepetskaya, Alexander N. Kravcov, Ivan E. Sas, Nikolii A. Morozov
This is probably due to the fact that the mechanical bond depends on the surface properties and, to some extent, on the shape of aggregate grains.
The properties of concrete aggregate determine the value of compressive load at which the onset of cracking occurs; similarly, the ultimate flexural strength of concrete depends on these properties.
But the relationship between these two parameters does not depend on aggregate properties.
The gain factor was 75 dB.
Morozov, Study of Effects of Weathering Factors on Internal Structure of Rocks by Laser Ultrasonic Spectroscopy.
Online since: March 2024
Authors: Eric Häntzsche, Carmen Sachse, Sven Hellmann, Chokri Cherif
Currently, the very limited adjustable elasticity of weft-knitted fabrics in lengthwise resp. in wale direction causes e.g. a reduction in fit and long-term properties.
The issue affects any type of weft-knitted fabric, especially in wale direction.
The single-thread variant -1T leads to thin knitted fabrics, which are suitable for the investigation of basic relationships, because the behaviour is only slightly overlaid by other factors, such as the residual stresses of the knitted fabric.
Berlin: Beuth Verlag GmbH, [5] MIKUČIONIENĖ, D.; ČIUKAS, R.; MICKEVIČIENĖ, A.: (2010)The influence of knitting structure on mechanical properties of weft knitted fabrics.
Materials Science (Medžiagotyra) Vol. 16, No. 3 [6] Fatkić E., Geršak J., Ujević D.: (2011)Influence of Knitting Parameters on the Mechanical Properties of Plain Jersey Weft Knitted Fabrics.
Online since: July 2014
Authors: Ling Yan Zhang, Yang Shuai Qiu, Wei Hong, Cheng Cai Deng
Introduction Graphite has good lamellar structure, stability chemical properties, good conductive and thermal conductivity performances and high crystallinity.
Compare with chemical synthesis process, the mechanical crushing process have many advantages.[1-3].
Therefore, the determination of the suitable media-to-material ratio without any doubt should take all the factors including mill volume, material mobility, stirring speed, motor input power and so on into consideration.
Both of the two factors above could access the crush speed and create dispersing effect, resulting in the increase of grinding efficiency.
Stirrer rotating speed directly affect the fineness of milling product.
Online since: October 2014
Authors: Xiang Xiong, Ya Lei Wang, Huai Fei Liu
In this paper, the phase stability and thermal-physical properties of 1mol.
Modern state-of-art aviation TBCs are usually of about 6-8wt% (3.5-4.5 mol%)Y2O3–stabilized ZrO2 (YSZ) which shows the best phase stability and mechanical property [3-6].
Among these multiple oxide systems, La2O3-Y2O3-ZrO2 (LaYSZ) has been considered as one of the most promising one, owing to its satisfactory properties, including high phase stability, sintering resistance and low thermal conductivity[9].
The mole fraction of monoclinic phase Mm, tetragonal phase Mt/t′ and cubic phase Mc were determined from the common equation (1) and (2)[9]: Mm/Mc,t/t′ =0.82[ Im(11) +Im(111)]/Ic, t/t′(111) (1) Mc/Mt/t′ =0.88Ic(400)/[ I t/t′(400) +I t/t′(004)] (2) Thermal properties.
The atomic mass is another factor affecting the thermal conductivity[14].
Online since: February 2018
Authors: Wei Wang, Yi Yi Chen, Qun He, Hai Tian
And the device made by LYP steel can dissipate a large amount of energy produced by strong earthquake for its remarkable cyclic hardening properties.
Other mechanical properties such as early re-yielding and material deterioration are reported by researchers [12, 13].
The measured mechanical properties of LYP100 are listed in Table 2, including elastic modulus E, off-set yield point , ultimate strength and others.
Table 2: Monotonic mechanical properties of LYP100 Coupon number E[MPa] [MPa] [MPa] [MPa] Elongation Fracture strain DD-01 193141 105 48 255 2.45 56% 2.90 DD-02 210163 106 45 250 2.36 58% --- DD-03 191067 110 44 254 2.27 60% --- Average 198123 107 45.7 251.3 2.37 58% 2.90 Fig. 3: Monotonic stress-strain response of LYP100 Cyclic Behavior.
[10] Saeki, Eiichiro, Sugisawa, Mitsuru, Yamaguchi, Tanemi, Wada, Akira, Mechanical Properties of Low Yield Point Steels.
Online since: August 2018
Authors: Ching Yen Ho, Fa Fen Yao, Yong Gang Chen, Song Feng Wan, Qing Bin Li
Analysis of Junction Temperature of AlGaInP LED Song-Feng Wan, Ching-Yen Hoa*, Yong-Gang Chen, Qing-Bin Li and Fa-Fen Yao Department of Mechanical and Electrical Engineering, Dongguan Polytechnic, Dongguan 523808, China a*hcy2182@yahoo.com.tw Keywords: AlGaInP, LED, Temperature Abstract.
Based on the material properties of AlGaInP LED, this paper proposes an approach for predicting the junction temperature.
It not only affects the photoelectric conversion efficiency and lifetime of the LED [1-3], but also significantly affects its operating characteristics [4,5].
This article analyzes the junction temperature of AlGaInP LEDs using Shockley's equation, Ohm's law, Fourier's law, and material properties of LEDs.
The influences of working parameters and material properties on the junction temperature are discussed.
Online since: February 2018
Authors: Hong Liang Hou, Yan Ling Zhang, Hai Tao Qu, Xue Ping Ren, Qi Jin
The microscopic models for predicting the physical properties of gradient materials are mainly divided into two types: linear model and nonlinear model.
The physical properties of Ti and TiC used in this paper are shown in Table 1.
Combined with the physical properties of the material, the finite element analysis of this paper is based on the theory of thermoelasticity, and the residual thermal stress distribution in the material is simulated.
According to the above analysis, it is shown that the introduction of the gradient layer can significantly moderate the thermal stress, and the higher the number of layers, the higher the thermal physical property matching degree between layers and layers, the lower the residual thermal stress, but when the gradient layer is more than 6 , The trend of reducing the residual stress is slowed down, in addition, the difficulty of the preparation and the economic factors are taken into account, so the optimal layer number is six.
Materials for Mechanical Engineering, 27(2) (2003) 14-16
Online since: October 2018
Authors: Janke Venkata Ramana Reddy, N. Sandeep, Vangala Sugunamma
Animasaun [6] considered the problem of Casson fluid flow past a plate with variable thermal properties and frictional heating.
Similarly fluid temperature is greatly affected by velocity ratio when compared to fluid concentration.
It is evident from the table 1 that an increase in Casson parameter , magnetic field parameter and velocity ratio parameter reduces both the friction factors and , but temperature exponent parameter does not shows any effect on friction factors.
The friction factor is not effected by cross diffusion.
Khan, Thermophoresis and thermal radiation with aheat and mass transfer in a magnetohydrodynamic thin-film second-grade fluid of variable properties past a stretching sheet, Europ.
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