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Online since: October 2016
Authors: Francesca Cimino, Veronica Ambrogi, Irene Bonadies, Cosimo Carfagna
The electrospinning process is highly dominated by various factors depending on process parameters (voltage, feed rate, spinneret-collector distance, etc.), on intrinsic solution properties (polymer molecular weight, polymer nature, solvent volatility, solvent conductivity, etc.), and finally, on the presence of additives such as bioactive payloads.
With the aim to use the nanofibrous mats containing Propolis on healthcare and well-being fields for improved performance and protection, the mechanical properties of plasticized mats were analysed.
The mechanical properties of electrospun nanofibers are often scarce in comparison with textile fibers made from the same polymers moreover the properties of electrospun fiber properties are affected by several factors related to the processing such as residual solvent and porosity of the nanofibers [19].
It is noteworthy the effect of plasticizer on mechanical properties in terms of modulus and strain: by increasing the plasticizer amount, the elongation at break and the elastic modulus enhance.
Sforcin, Biological Properties and Therapeutic Applications of Propolis, Phytother.
Online since: January 2010
Authors: Günter Gottstein, Rolf Berghammer, Zhen Shan Liu, Si Jia Mu, Wei Ping Hu
The investigation results revealed different grain refinement kinetics during CCDP and distinct mechanical behaviours after CCDP for both alloys.
(c) central area of the CCDP-sample where the specimens were cut out for microcharacterization and mechanical tests.
Microcharacterization and mechanical testing.
Since the mean spacing of dislocation forest (that is corresponding to the l* in equation 2) can be scaled to the grain size, therefore, the SRS of Al-1.5Mn alloy is mainly affected by the grain size but is weakly dependent upon the precipitates.
Gottstein, in: Aluminium Alloys - Their Physical and Mechanical Properties, Vol. 1, p. 842-848, edited by J.
Online since: January 2013
Authors: Hai Peng Li, Li Hui Wang, Jia Wei Fan, Xue Xia Wang, Ju Yuan Zhao
They also affect the lead time, and quality and cost of panel die development.
The FEM simulation can be made fully automatic and can be extended to cases of complex geometry, loading material properties as well as to other objective functions of the optimisation problem [6].
Therefore, to prevent potential defects and the disadvantageous factors in designing molding process of automobile trunk side panel, a complex automobile covering part, we determined its forming process by numerical simulation technology and corresponding FEM software.
Material properties Automobile trunk side panel, the objective studied in this paper, is shown in Fig. 1.
Mechanical property parameters of the model are listed in the Table 1.
Online since: December 2013
Authors: Dong Tao Hu, Guo Li Chen, Huan Ming Zhou, Ying Sun
Because the safety factor of underground mining issues, we have designed an RFID-based underground personnel positioning system design, the system can be used in systems for daily attendance, reduce accidents in human factors, safety in the event of an accident, for accident investigation provide an important basis.
Recent years, China mine accident-prone, not only to cause great harm to the people, but also the state property suffered significant losses.
So as not to affect the normal reader reads the card
(4) Line saving: Make sure to check personnel positioning system used in the cables for damage, including power cables and signal transmission cable, and the Times should repair any damage, to avoid interruptions in data transfer, thus affecting the overall personnel positioning data intact
During a failure, if the circumstances affecting the underground personnel monitoring, manual monitoring should be used, and make a record.
Online since: May 2014
Authors: Apiwat Muttamara, Somchai Wonthaisong, Rattikorn Saodaen, Janmanee Pichai
The workpiece of martensitic stainless steel grade AISI 410 is widely used in many industrial factories, which favor the material’s properties of wear resistance [2-4].
Knight [6] studied the parameters that affect the size of stainless steel 304 using EDM.
The experiment conditions included: positive polarity, negative polarity, open circuit voltage (250 V), pulsed current (9 A), pulse on-time (12 μs), pulse off-time (12 μs), and duty factors (50%).
In addition, in the positive polarity of electrode materials, as a result, show that the fluid dielectric material is a hydrocarbon, when broken down to make carbon, having properties of negative charge and contamination of the spark runs, maintaining positive results when coating the electrodes [11].
Moreover, the white layer surface melting material also affects the integrity of the state park.
Online since: October 2009
Authors: Xi Bin Wang, Yu De Liu, Yue Yang, Shuo Wang, Wu Wen
The superficial properties of metals after being etched for several hours have also been studied and analyzed.
Then we should change the mechanical drawing into document with GIF format.
Assessment of Environmental Condition It indicated that there were many factors would affect the microbe growth, except for genetic background, such as pH value, nutrient solution, temperature, concentration of main nutrients, concentration of dissolved oxygen in nutrient solution etc.
The pH value of etching liquid in etching process are the important influencing factors.
The roughness is one of the main factors about micro part that was etched during the micro part engaged with other micro part.
Online since: February 2021
Authors: Natalina Damanik, Hendery Dahlan
Material Properties Material properties data of L-1 re-examined for potential insight into material specification compared to material standard.
Material properties were examined into mechanical properties and material composition, as shown in Table 1.
Fig. 5 L-1 blade airfoil profile Material Properties Table 2 and Table 3 show mechanical properties and chemical composition of L-1 material compared to AISI 422 standard, respectively.
Experimental investigation into microstructure, metallurgy and mechanical properties of AISI 422 stainless steel weldments produced using fibre laser welding direct forming.
[25] Stress Intensity Factors of Cracks.
Online since: May 2011
Authors: De Ying Li, Jie Zhang
And compound the insulation properties of materials to the exterior wall outside is called Exterior wall insulation.
XPS board exterior insulation system.XPS board system instead of EPS board system has low thermal conductivity, good insulation properties, but the XPS plate surface adhesion and permeability should be further studied. 3.
Big deviation of dual distribution ratio affects the product quality.
These relate to slurry’s rheological properties, construction people’s correct operation and the overall balance of skills and experience.
The quality of the construction organization directly affects project progress and quality.
Online since: October 2007
Authors: Yu Li Liu, He Yang, Tao Gao
Results and Discussion Mechanical Model and Deformed Meshes.
In this study, 3D four-node tetrahedral isoparameteric elements were used to carry out the discretization of a mechanical model.
(a) m=0.1 (b) m=0.2 (c) m=0.3 Fig. 2 Distribution of temperature of the deformed blade under various friction factors when height reduction is 8.0mm A A B B (a) m=0.1 (b) m=0.2 (c) m=0.3 Fig. 3 Distribution of temperature of the section A-A under various friction factors (a) m=0.1 (b) m=0.2 (c) m=0.3 Fig. 4 Distribution of temperature of the section B-B under various friction factors From the above figures, it can be seen that the distribution gradient of temperature increases, and the distribution of temperature becomes more and more uneven with increasing of friction factor.
But the temperature value of lower temperature zone located in the zone contacting dies has hardly been affected by friction.
From this figure, we can see that the change trend of load-stroke curves is similar under different friction factors, but the bigger is the friction factors, the bigger is the forging load, especially at the final forging stage.
Online since: November 2007
Authors: Pierre Fauchais, R. Cuenca-Alvarez, H. Ageorges
The influence of dry particle coating on the properties of coatings produced by d.c. arc plasma spraying is reported.
The key parameters affecting the mechanofusion process and the corresponding plasma spraying method have been varied in order to increase the hardness of the resulting composite coatings.
However, the combination of different materials helps to limit these effects and even more to increase the coating properties provided that the ceramic particles are uniformly distributed within the coating.
All composite powders are found to be nearly spherical with a mean shape factor of 1.05 (shape factor of 1.0 corresponding to the perfect sphere).
The microstructural characteristics of the coatings influence their hardness properties.
Showing 12851 to 12860 of 25943 items