A three-dimensional model of reverse dual-rotation friction stir welding （RDR-FSW） is developed to conduct the numerical simulation of heat generation and material flow during the process. The reverse rotation of th...
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A three-dimensional model of reverse dual-rotation friction stir welding （RDR-FSW） is developed to conduct the numerical simulation of heat generation and material flow during the process. The reverse rotation of the assisted shoulder and the tool pin is considered to model the heat generation rate. The predicted temperature difference between the advancing side and the retreating side in RDR-FSW is less than that in conventional FSW. There are two reverse flows during the RDR-FSW which is beneficial to the uniformity of the temperature profile. Due to the reverse rotation effects of the assisted shoulder, the predicted shape and size of thermal-mechanically affected zone （TMAZ） based on the iso-viscosity line are decreased greatly compared to the conventional FSW. It lays solid foundation for optimizing the process parameters in RDR-FSW.
This paper presents a detailed discussion of the bending properties of laser welded web-core steel sandwich plates and the influence of weld width on stiffness and strengthThe over-hanging three point bending test was...
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ISBN:
(纸本)9783038351023
This paper presents a detailed discussion of the bending properties of laser welded web-core steel sandwich plates and the influence of weld width on stiffness and strengthThe over-hanging three point bending test was conducted on the laser welded web-core steel sandwich plates with various welds width by self-designed device, together with the finite element simulationsA good agreement is obtained between the 2D FE analyses and experiment resultsThe stiffness and strength of the sandwich plates increased with the increasing of weld width, especially for the weld width lower than 60% thickness of the core plateIt is necessary to consider the weld width in the design and evaluation of the stiffness and strength of the laser welded web-core sandwich plateBase on the results, the FEM is the priority to analysis bending properties of laser welded web-core steel sandwich plates.
Three-dimensional (3D) flowerlike CuO structures were prepared successfully by reducing copper chloride (CuCl2 2H2O) aqueous solution in the presence of cetyltrimethylammonium bromide (CTAB). The as-prepared CuO struc...
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Antimony-doped tin oxide films were prepared by sol-gel technique from an ethanolic solution of SnCl4.5H2O and SbCl3. The effect of the addition of acetylacetone as a hydrolysis modifier was investigated. Structural, ...
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ISBN:
(纸本)9781632660008
Antimony-doped tin oxide films were prepared by sol-gel technique from an ethanolic solution of SnCl4.5H2O and SbCl3. The effect of the addition of acetylacetone as a hydrolysis modifier was investigated. Structural, optical and electrical properties of the films were studied by XRD, FESEM, TEM, FTIR, UV-vis, TG and Hall effect measurements. TEM results showed that antimony-doped tin oxide films consist of well-crystallized grains ranging from 5 to 10 nm. It was found that the addition of the acetylacetone influences positively the film properties. The appropriate addition of acetylacetone allowed for the preparation of films with an optical transmittance as high as 97% in the visible region and 47% at 200 nm. Highly transparent films prepared in this study exhibit an electrical resistivity of 10-3 Ω cm which make them attractive for photovoltaic cell applications.
For chiral gels and related applications, one of the critical issues is how to modulate the stereoselective interaction between the gel and the chiral guest precisely, as well as how to translate this information into...
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For chiral gels and related applications, one of the critical issues is how to modulate the stereoselective interaction between the gel and the chiral guest precisely, as well as how to translate this information into the macroscopic properties of materials. Herein, we report that this process can also be modulated by nonchiral solvents, which can induce a chiral‐interaction reversion for organogel formation. This process could be observed through the clear difference in gelation speed and the morphology of the resulting self‐assembly. This chiral effect was successfully applied in the selective separation of quinine enantiomers and imparts “smart” merits to the gel materials.
The connections between the thermoelectric modules are crucial importance for the performance of the thermoelectric power system. Many studies have been done to improve the output of thermoelectric system, but very li...
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In order to utilize the exhaust heat of internal combustion engine effectively and enhanceits fuel economy, a test bench used in Automobile Exhaust Thermoelectric Generator (AETEG) isdesigned in this paper, the main c...
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The tetragonal yttria-stabilized zirconia polycrystal coupling Mg Al2O4(3YTZP-30vol.%Mg Al2O4)exhibited the best high-strain-rate superplasticity in the binary systems,but few investigation had aimed
The tetragonal yttria-stabilized zirconia polycrystal coupling Mg Al2O4(3YTZP-30vol.%Mg Al2O4)exhibited the best high-strain-rate superplasticity in the binary systems,but few investigation had aimed
The research on aggregation-induced emission (AIE) has drawn increasing interests in the past decade. With the efforts scientists paid, a variety of AIE systems have been developed, among which the tetraphenylethelene...
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The research on aggregation-induced emission (AIE) has drawn increasing interests in the past decade. With the efforts scientists paid, a variety of AIE systems have been developed, among which the tetraphenylethelene and silole derivatives are the most studied. Development of new AIE systems could further enrich the AIE molecules and promote the development of AIE area. In this communication, we prepared a new AIE system based on 1,2,4,6-tetraphenylpyridinium ions according to the restriction of intramolecular rotation mechanism. These molecules could be facilely synthesized via one-step and one-pot reaction. The ionic AIE-active molecules could find wide application in sensing and optoelectronic areas.
Mesoporous vOx@carbon composites were synthesized via ultrasound-assistant impregnation method with mesoporous carbon C-FDU15 as the host. the composites with 32.26 wt% V2O5 loading yield the best capacitance (128 F/g...
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