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Online since: April 2023
Authors: Seiki A. Chiba, Makoto Takeshita, Kazuhiro Ohyama, Mikio Waki
Figure 8 shows the dynamic viscoelastic properties (storage and loss modulus) of four of the same types of samples that were measured by SS curves.
The amount of cross-linking agent added to the elastomer also affects its characteristics, but if it is too small, the strength of the membrane deteriorates and is not recommended [28].
Kojima, 1992, Mechanical Properties of Shape Memory Polymer of Polyurethane Series, in JSME International J., Series 1, 35 (1992) 3
Ohyama, Examination of factors to improve the elongation and output of dielectric elastomers, In Proc.
Pei, Factors Influencing the Performance of Dielectric Elastomer Energy Harvesters.
Online since: November 2017
Authors: Alexander Kodentsov
Wang and Engell [46] determined thermodynamic properties of the β-NiAl phase in the temperature range 961-1278 K and a compositional range 32.2 to 58.7 at. % of Al by electromotive force method.
The position of the marker plane at such interface does not necessary result in conclusions about the diffusion properties of both phases.
Cohen, The defect structure and Debye-Waller factors vs. composition in β Ni1±xAl1±x, Scripa Metall. 11 (1971) 147-150
Engell, Investigation of the thermodynamic properties of Ni-Al intermetallic compounds by an EMF method, Steel Research 63 (1992) 320–323
Hilpert, Thermodynamic properties and diffusion factor in B2-NiAl, Metall.
Online since: March 2021
Authors: Leong Wai Lim, J.C.L. Chiang
Introduction Earthquakes are one of the most destructive natural hazards that cause huge amount of loss of life and property.
Short column strength is governed by properties of the material strength and section.
Slender column strength is governed by many factors and requires special measures such as more reinforcement and bracing element to improve performance.
When working with reinforced concrete, a mechanical vibrator is to be considered as it is more suitable in providing efficient and high quality results.
The shrinking capacity during the curing period is not affected by the density of reinforcement.
Online since: September 2018
Authors: Denys Chayka, Inga Emeljanova, Pavel Andrenko, Alexsander Grigoryev
The results of a multiple-factor experiment are presented.
Numerically Simulated Operation Model of the Pump Fed with Mortar Basic assumptions of the model: · The mortar when being fed has the properties of incompressible isothermal fluid, the extend of its state changing does not depend on pressure and velocity gradient (i.e., considering large pressure gradients in the working space of the pump and the hose, dry friction between sand particles is neglected and this fluid is assumed to be Newtonian)
Along with the flow cross-section, the roller also affects the volume of the working zone, and this volume change ∆V is described by the following formula: , if ; unless it is assumed that .
As the density of the concrete mix increases, the speed of sound changes, which is determined according to the dependence: , Change in the volume parts of the concrete mixture does not affect the dynamics of pressure and velocity values.
Properties of concrete. – London: Longman, 1995. – Т. 4. – 344 р
Online since: October 2010
Authors: Yong Lu Chen, Li Guang Huang, Qiu Ju Li, Zhe Liang Wei, Ding Yi Zhu, Lian Deng Wang, You Sheng Wang
Effect of the mixing-melt and superheating on the primary Si phase of hypereutectic Al-20%Si alloy WANG Liandeng1, 2, ZHU Dingyi1, WEI Zheliang2, CHEN Yonglu1, HU ANG Liguang2, LI Qiuju2, WANG Yousheng1 1College of Materials Science and Engineering, Fuzhou University; 2College of Mechanical Engineering, Fuzhou University, Fuzhou 350108, China Liandeng@fzu.edu.cn; Liandeng@yahoo.cn Keywords: hypereutectic Al-Si alloy; pre-crystallized characteristic; melt-mixing; melt-superheating; refinement; modification.
Hence the modification of the Silicon to reduce the impairment of the aluminum is an effective and practical means to improve the properties of the Al-Si alloy [2].
Discussions The thermodynamic factor of different ingredient melts mixing with high- and low- temperature on the of primary Si of Al-20%Si The mechanism of refining solidified microstructure of the melt mixing process for present was mostly explained by the theory of the atom aggregation and structure of liquid metals [12-15], which did not consider fully the change of the thermodynamics caused by the melt blending process.
The temperature of mixed melt could be decreased remarkably by the melt blending process and the degree of undercooling of melt be increased before solidifying, thereby changing the pre-crystallized state of the melt and affecting the subsequent solidified structure.
/J·g-1 /J·g-1·K-1 / J·g-1·K-1 398 0.9 0.71 Table 1 Partial physical properties of Al-Si alloy Fig.6 Phase diagram of Al-Si binary alloy Besides, the quick melt-blending could cause the recombination of chemical bond in Al-Si alloy for the different composition between the high-temperature melt and low-temperature melt.
Online since: February 2012
Authors: Sambandam Anandan
Among the unique properties of nanomaterials, the movement of electrons and holes in semiconductor nanomaterials is primarily governed by the well-known quantum confinement and the transport properties related to phonons and photons are largely affected by the size and geometry of the materials [14-18].
C 2008, 112, 253-259 After that nanotubular materials are considered important in photocatalysis owing to their special electronic and mechanical properties, high photocatalytic activity, large specific surface area and high pore volume [51,52].
Even though each of the above processes have certain limited efficiencies, cost factors, and environmental effects.
Dai, Carbon Nanotubes: Synthesis, Integration and Properties, Acc.
Jorio, Unusual properties and structure of carbon nanotubes, Annu.
Online since: February 2015
Authors: Noor Emilia Ahmad Shafie, Nazri Kamsah, Haslinda Mohamed Kamar
CFD Simulation of Air Temperature inside a Bus Passenger Compartment Noor Emilia Ahmad Shafie1,a, Haslinda Mohamed Kamar1,b* and Nazri Kamsah1,c 1Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru Malaysia anemilia2@live.utm.my, bhaslinda@mail.fkm.utm.my, cnazrikh@fkm.utm.my *haslinda@mail.fkm.utm.my Keywords:Computational Fluid Dynamics; Air Temperature; Bus Passenger Compartment.
· The air inlet was applied at the air supply diffusers and the properties of air in the passenger compartment were governed by the equations of state for incompressible flow and the reference pressure was set to atmospheric pressure, 101325 Pa
Human breathing, heavy occupancy, bus geometry and the ventilation system are the factors that influence the air movement inside the bus.
Online since: April 2018
Authors: Ashok Kumar, Swati Sharma, Ambika Verma, Hesam Kamyab
Magnetic nano-composites have higher electrical conductivity and higher chemical resistance, improved mechanical strength and optical properties, of without decrease of strength.
The optical, electrical, thermal, mechanical, and the catalytic properties of nano-particles are depending upon their origin and constituent materials [19-20].
Most of the firms, oxides, mix nanoparticulate metals and additional materials with matrix materials and polymers to optimize the nano-composites properties with respect to barrier properties, magnetic properties, conductivity, flame retardancy color/transparency, and anticorrosive properties, in addition to modulus, tensile strength and heat distortion temperature.
For superior storage applications, all these factors must be optimized and noble strategies should be developed for enhanced processing and understanding of the device fabrications.
Raj, Nanofluid with tunable thermal properties, Appl.
Online since: April 2024
Authors: Feng Qi Zhong, Xu Dong Guo, Jian Ru Xiao, Wei Xu, Zhen Hua Zhou
The root mean square value characterizes the contractile properties of muscle.
For example, SVM has only kernel function and penalty factor such two parameters.
The selection of muscle groups determines the location of electromyography collection, and the placement of electrodes in the collection device directly affects the presence and strength of experimental signals.
Among them, the kernel function and penalty factor of the SVM algorithm were set in default.
Chen, et al, Identification of six upper limb action EMG signals based on MATLAB, Mechanical Engineer, 5(2022) 17-19
Online since: November 2017
Authors: Juan Rubio, M. Alejandra Mazo, Aitana Tamayo, Javier Sanguino
Their high aspect ratio and excellent mechanical, thermal and electrical properties could potentially provide new materials with improved mechanical resistance and/or additional electrical and thermal features [2-4].
So far, the properties of the CNTs-CNFs/ceramic composites currently fall short of predictions.
The need for a relatively high processing temperature was one of the causes of the limited mechanical properties of the composites obtained.
Oteo, Processing and properties of carbon nanofibers reinforced epoxy powder composites, J.
Part II: microstructure and mechanical properties of the hot-pressed composites, J.
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