铸造过程的多尺度模拟研究进展

铸造行业对国民经济的发展具有重要作用，但我国与国外有很大差距，严重制约着经济的发展。铸造成形加工技术的发展趋势之一是用计算机模拟仿真技术来逐步代替传统的经验性研究方法。计算机模拟技术已成为改造传统铸造产业的必由之路，在生产中得到了越来越广泛的应用。随着铸造过程宏观模拟技术的成熟，研究者们把目光转向了微观过程模拟与多尺度模拟。主要针对目前的研究热点和发展趋势作了阐述，特别是对新一代精确铸造充型凝固过程模拟、铸造过程的应力应变分析、微观组织的形成与演变及并行工程环境下的多尺度模拟仿真等方面的国内外最新进展进行了分析，同时重点介绍了我国在这方面的研究成果。

PROGRESS ON MULTI-SCALE MODELING OF CASTING PROCESS

Casting industry is critical to the national economy. However there exists big gap between the casting technologies at home and abroad. One of the important future trends is the application of numerical simulation technique to substitute the traditional empirical research methods. Numerical simulation has become the necessary way to up-grade the traditional casting industries and been paid with much more attention. With the mature of macro-modeling of casting process, micro-modeling and multi-scale modeling become one of the hottest research frontiers attracting many researchers and engineers. The current research hotspots and the development trends of modeling of casting processes are mainly introduced, especially on the mold filling and solidification processes of net shape casting, the stress and strain analyses, the prediction of the formation and evolution of microstructure and the multi-scale modeling under concurrent engineering environment. At the same time, the related achievements in our country are given with special emphasis.