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学术讲座:增材制造的多尺度多物理场建模

2018/12/28 14:17:59人浏览

 

报告题目:增材制造的多尺度多物理场建模

 

主讲嘉宾:闫文韬助理教授,新加坡国立大学

 

讲座时间:201917日上午9:00~10:00

 

讲座地点:南校区机电楼S601

 

邀请人:刘长勇老师

 

嘉宾简介:

 

闫文韬博士于20188月起于新加坡国立大学机械工程系担任助理教授。在此之前,在美国西北大学担任博士后研究员,并同时担任美国国家标准研究院客座研究员。他的研究兴趣包括:先进制造、计算力学以及多尺度建模。他的研究在国际上受到广泛认可,并被邀请到多个权威国际会议(如世界计算力学大会, World Congress in Computational Mechanics)、著名大学、研究所以及高科技企业做主题报告(如滑铁卢大学、北京大学、美国阿贡国家实验室、美国劳伦斯国家实验室、美国国家标准研究院、利弗莫尔软件科技公司等)。他同时还担任过多个国际会议的科学委员会委员及会议主席等。

 

报告摘要:

 

Metallic powder-based additive manufacturing (AM) technologies show promising potentials to reshape manufacturing industries, including advanced composites. However, the wide adoption is hindered by the lack of understanding of physical mechanisms and assessment of numerous influential factors. To this end, I have developed a multi-scale multi-physics modeling framework consisting of: physically-informed heat source models, specifically, for an electron beam from micro-scale simulations of electron-atom interactions, and for a laser incorporating multi-reflection and Fresnel absorption; high-fidelity powder-scale Discrete Element Method-Computational Fluid Dynamics (DEM-CFD) models to simulate powder being spread and then melted; and an efficient Finite Element (FE) heat transfer model at part-scale. I will also introduce our efforts on seamlessly linking Process-Structure-Property models. With the experimental configuration and material-dependence incorporated, the models have proved to be valuable to understand and optimize the AM process of complex materials.

欢迎大家参加!