Papers by Author: B. Zhang

Abstract: To improve the product properties of H-beams, it is essential to understand the effects of hot rolling parameters on the microstructure evolution of the beams. For this purpose, a thermo mechanical model was built with the finite element Package ABAQUS. By re-meshing the model, multipass large-deformation hot rolling process was simulated under the boundary conditions predefined in accordance with the practical production. Based on the hot rolling simulation, an impact analysis of strain rate, initial rough rolling temperature, and time interval between passes on the microstructure evolution of H-beam austenite was conducted. The analytical results are meaningful for optimizing hot rolling parameters and improving H-beam properties.

Abstract: The whole-life design of complex electro-mechanical systems is extremely significant which could satisfy the high reliability requirement of production line and reduce the accident caused by complicated equipments. In this paper, the whole-life of gear was taken as an example to indicate that the sustainable development of whole-life design must rely on the study of few sampling systems. Two research strategies of few sampling systems are proposed: numerical simulation and virtual prototype technology.