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An experimental and numerical study of electrical contact for low currents in sphere-plane set-up is presented. A three-level multi-scale model is proposed. We use the finite element analysis for macroscopic mechanical and electric simulations. It takes into account the setup geometry, elasto-plastic mechanical behavior of contacting components in the finite-strain-plasticity framework and electrostatic...
Beam elements have played a very important role in modeling mechanical engineering structures. Curved beams are known to be more efficient in transfer of loads than straight beams. The transfer in the curved beam is affected by means of bending, shear and membrane action. This is particularly important in studying initially curved beams. The aim of this project is to improve the use and flexibility...
A new method integrating reduced model and mixed design variables is proposed and applied in the lightweight design of a bus skeleton for the purpose of mass reduction without loss in structural performance. A whole skeleton model and a reduced model are built. All parts except chassis and floor assembly are reduced out using static reduction method. Reduced model is verified with finite element analysis...
Fracture tests were performed on 10 structural steel tubes with circular hole. Test results indicate that crack initiate at the edge of the hole and propagate perpendicularly to loading direction. The initial crack come into being earlier with the magnification of the radius of the hole. Tubes with two holes behave more ductile than those with one hole. The numerical procedure implemented the generalized...
Finite element models of hole-structure are built for analyzing hole-edge contact problems under thermal loads. In order to obtain accurate and reasonable numerical results, elastic model and elastic-plastic model are built in gradual improvement. In order to eliminate the influence of clamped support, a kind of artificial elastic boundary is proposed for simulating the boundary of hole-structure...
This paper describes the current state in the development of a computational steering framework that couples a visualisation front-end and an analysis back-end running independently of each other for interactive simulations from various fields of engineering and science. The objective of our software development is the realisation of a "Human-in-the-Loop" scenario that supports comprehension...
Draping and buckling of woven fabric and knitted fabric are simulated with finite element method under gravity load, and the difference between them is analyzed. In the process of simulation, micro-mechanical models of woven fabric and knitted fabric that characterize the special properties of fabric due to their structures are used. The fabric sheet is discretized with 8-node shell elements which...
This paper describes a semi-analytical modeling of an industrial electrical system operating in a pulse mode. It focuses principally on the transformer leakage inductances computation. First, the implemented analytical model is presented. It takes into account nonlinear elements behaviors, such as transformers, as well as other elements that behavior is both discontinuous and nonlinear, such as static...
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