Kunming, China

Kunming University of Science and Technology is located in Kunming, the capital city of Yunnan Province, Southwestern China.As the goal by 2010, KUST is to become a key university with strong science and engineering background. The university is to be developed into an important provincial training base for advanced technical personnel, a research base for both applied fundamental research and hi-tech research, an industrialization base for hi-tech, and also a research and consulting center for the national social and economic development.Yunnan University Science Park was established as an experimental site of University Science Park in 1999 and was awarded the status of national university science park in May 2001. The Park is supported by Yunnan University, Kunming University of Science & Technology and Yunnan Normal University. Wikipedia.


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He X.,Kunming University of Science and Technology | Gu F.,University of Huddersfield | Ball A.,University of Huddersfield
Progress in Materials Science | Year: 2014

Friction stir welding is a relatively new solid-state joining technique which is widely adopted in different industry fields to join different metallic alloys that are hard to weld by conventional fusion welding. Friction stir welding is a highly complex process comprising several highly coupled physical phenomena. The complex geometry of some kinds of joints and their three dimensional nature make it difficult to develop an overall system of governing equations for theoretical analyzing the behavior of the friction stir welded joints. The experiments are often time consuming and costly. To overcome these problems, numerical analysis has frequently been used since the 2000s. This paper reviews the latest developments in the numerical analysis of friction stir welding processes, microstructures of friction stir welded joints and the properties of friction stir welded structures. Some important numerical issues such as materials flow modeling, meshing procedure and failure criteria are discussed. Numerical analysis of friction stir welding will allow many different welding processes to be simulated in order to understand the effects of changes in different system parameters before physical testing, which would be time-consuming or prohibitively expensive in practice. The main methods used in numerical analysis of friction stir welding are discussed and illustrated with brief case studies. In addition, several important key problems and issues remain to be addressed about the numerical analysis of friction stir welding and opportunities for further research are identified. © 2014 Elsevier B.V. All rights reserved.


He X.,Kunming University of Science and Technology
International Journal of Adhesion and Adhesives | Year: 2011

The need to design lightweight structures and the increased use of lightweight materials in industrial fields, have led to wide use of adhesive bonding. Recent work relating to finite element analysis of adhesively bonded joints is reviewed in this paper, in terms of static loading analysis, environmental behaviors, fatigue loading analysis and dynamic characteristics of the adhesively bonded joints. It is concluded that the finite element analysis of adhesively bonded joints will help future applications of adhesive bonding by allowing system parameters to be selected to give as large a process window as possible for successful joint manufacture. This will allow many different designs to be simulated in order to perform a selection of different designs before testing, which would currently take too long to perform or be prohibitively expensive in practice. © 2011 Elsevier Ltd. All rights reserved.


Wang Y.,Kunming University of Science and Technology
Applied Physics Letters | Year: 2014

We propose a silicene-based lateral resonant tunneling device by placing silicene under the modulation of top nonmagnetic/ferromagnetic/nonmagnetic sandwich nanogates. Following the electric-tunable bandgap of silicene, lateral double-barrier structure is formed by imposing the flexible electrostatic modulation on top gates. By aligning the spin and valley-resolved confined states in magnetic well, remarkable spin/valley polarization can be accessed through spinor-relying resonant tunneling mechanism. Under the electrostatic, magnetic, and size manipulation, the confined well state can be efficiently engineered, and the observed spin and valley polarization can be further flexibly tuned, offering some helpful strategies to construct spinor-electronic logic atomically. © 2014 AIP Publishing LLC.


He X.,Kunming University of Science and Technology
International Journal of Advanced Manufacturing Technology | Year: 2010

Clinching is a high-speed mechanical fastening technique for point joining of sheet materials. Published work relating to finite element analysis of clinched joints is reviewed in this paper, in terms of process, strength, and vibration characteristics of the clinched joints. It is concluded that the finite element analysis of clinched joints will help future applications of clinching by allowing system parameters to be selected to give as large a process window as possible for successful joint manufacture. This will allow many tests to be simulated that would currently take too long to perform or be prohibitively expensive in practice. © 2009 Springer-Verlag London Limited.


He X.,Kunming University of Science and Technology
Materials and Manufacturing Processes | Year: 2012

As a well-established modern manufacturing process, laser welding is widely adopted in different industry fields to assemble lightweight structures. Major advances have been made in recent years in laser welding. This article reviews the latest development of finite element analysis of laser welding, in terms of process, damage modeling, fatigue behavior, dynamic characteristics, and laser hybrid welding. Some important numerical issues such as materials modeling, meshing procedure, and failure criteria are discussed. Finite element analysis of laser welding will allow many different laser welding processes to be simulated in order to perform a selection of different system parameters before testing, which would be time-consuming or be prohibitively expensive in practice. The main methods used in finite element analysis of laser welding are discussed and illustrated with brief case studies. © 2012 Copyright Taylor and Francis Group, LLC.


He X.,Kunming University of Science and Technology
International Journal of Adhesion and Adhesives | Year: 2014

Adhesively bonding is a high-speed fastening technique which is suitable for joining advanced lightweight sheet materials that are dissimilar, coated and hard to weld. In this paper, the free torsional vibration characteristics of adhesively bonded single-lap joints are investigated in detail using finite element method. The effectiveness of finite element analysis technique used in the study is validated by experimental tests. The focus of the analysis is to reveal the influence on the torsional natural frequencies and mode shapes of these joints caused by variations in the material properties of adhesives. It is shown that the torsional natural frequencies and the torsional natural frequency ratios of the adhesively bonded single-lap joints increases significantly as the Young′s modulus of the adhesives increase, but only slight changes are encountered for variations of Poisson's ratio. The mode shapes analysis show that the adhesive stiffness has a significant effect on the torsional mode shapes. When the adhesive is relatively soft, the torsional mode shapes at the lap joint are slightly distorted. But when the adhesive is relatively very stiff, the torsional mode shapes at the lap joint are fairly smooth and there is a relatively higher local stiffening effect. The consequence of this is that higher stresses will be developed in the stiffer adhesive than in the softer adhesive. © 2013 Elsevier Ltd.


He X.,Kunming University of Science and Technology
International Journal of Adhesion and Adhesives | Year: 2012

The need to design lightweight structures and the increased use of lightweight materials in industrial fields, have led to wide use of adhesively bonding in recent years. In the design of mechanical systems, which consist of adhesively bonded joints, for minimum vibration response, a specific knowledge of the damping capacity of the component materials and joints is important. It is believed that adhesively bonded joints act to augment the system damping capacity in view of the increasing use of viscoelastic materials in their design. The aim of this paper is to provide an efficient numerical technique for the prediction of the dynamic response of bonded beams with a single-lap joint and to validate the predictions via experimental tests. The finite element method was used to predict the natural frequencies, mode shapes and frequency response functions of the beams. The dynamic test software and the data acquisition hardware were used in the experimental measurement of the dynamic response of the joints. The frequency response functions of the joints of different adherend widths and of different adhesive layer thickness were measured. The frequency response functions and mode shapes predicted using the finite element method were compared with those measured experimentally. The coordination of the numerical and experimental techniques makes it possible to find an efficient tool for studying the dynamic response of bonded beams with a single-lap joint. © 2012 Elsevier Ltd. All rights reserved.


Patent
Kunming University of Science, Technology and Zhou | Date: 2016-01-20

The invention involves a vibrating inclined plate box settlement separator, which is used for the liquid-solid separation, particularly applicable to high-efficiency settling concentration and separation of solid particles from liquid or water. The separator consists of an upper box and a lower tapered hopper. The upper box and the lower tapered hopper are connected securely to each other and sealed. The upper box is a rectangular or square steel-structured box with two supporting platforms on both of its sides, on which several spring assemblies are installed. The inclined plate box modules which can independently vibrate are installed on the spring assemblies. The feed box is placed on top of or inside the upper box. An overflow collect chute is welded on the side of the box frame opposite to the feed box. The inclined plate box modules are connected to the overflow collect chute with rubber tubes. The lower tapered hopper is a square or rectangular square tapered hopper or a square round tapered hopper. It is mounted securely onto steel-structured bracket or reinforced concrete framework. A smaller wear-resistant tapered hopper is connected to the bottom of the first hopper.


Patent
Kunming University of Science and Technology | Date: 2012-03-12

Disclosed is a process for purifying tail gases from an ore-smelting electrical furnace by catalytic oxidization, which comprises: impregnating a catalyst carrier in an impregnating solution, then aging, calcinating, and finally drying, so as to prepare a catalyst of high efficiency; then washing the tail gases from an ore-smelting electrical furnace with an aqueous alkali-containing solution, pre-heating the alkali-washed tail gas; and adjusting the oxygen volume content in the tail gases, charging the tail gases at a certain speed, purifying the gases by a catalytic oxidization fixed bed containing the catalyst of high efficiency, cooling the purified gas, so as to obtain the feed gases for C1 chemistry.


Patent
Kunming University of Science and Technology | Date: 2013-06-05

The invention involves a vibrating inclined plate box settlement separator, which is used for the liquid-solid separation, particularly applicable to high-efficiency settling concentration and separation of solid particles from liquid or water. The separator consists of an upper box and a lower tapered hopper. The upper box and the lower tapered hopper are connected securely to each other and sealed. The upper box is a rectangular or square steel-structured box with two supporting platforms on both of its sides, on which several spring assemblies are installed. The inclined plate box modules which can independently vibrate are installed on the spring assemblies, The feed box is placed on top of or inside the upper box. An overflow collect chute is welded on the side of the box frame opposite to the feed box.

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