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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.


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. Source


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

Increasing applications of adhesively bonded joints require understanding of the stress distribution along the bond-line and the stresses that are responsible for the joint failure. The effect of boundary conditions on the actual stress distributions of a single-lap adhesively bonded joint was investigated using the three dimensional finite element method. Specifically, finite element solutions of the stress distributions in the adhesive layer have been obtained for three typical boundary conditions. The results indicate that though the stress distributions of a single-lap adhesively bonded joint are strongly affected by the boundary conditions of the joint, the stress concentrations are confined to a very small region near (or at) the free ends of interfaces between the adherend and the adhesive layer while the centre region of the adhesive layer is mostly stress-free. Thus, the load-bearing capability of a single-lap adhesively bonded joint may not be significantly reduced by the existence of bubbles within the bulk of the adhesive which is an important problem in actual mass production. © 2014 Elsevier Ltd. Source


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. Source


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. Source


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. Source

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