（一）美国德克萨斯大学奥斯汀分校Bourell教授学术报告
报告题目：Materials Issues in Additive Manufacturing
报告人：David L. Bourell
报告时间：3月7日上午9:00-10:00
地点：教一411
主办单位：流体动力与机电系统国家重点实验室
报告摘要：This presentation has four parts. First is a brief review of the historical developments in additive manufacturing (AM), dating back ~150 years. Research and technological developments are divided into three categories: prehistory (~1860-1960) in which computers were not used; precursors (~1965-1985) for which computers were known to the inventors but not the general public; modern AM processes (~1984-). Second is a survey of the current status of the AM field which includes phenomenal growth over the last ten years. Third, a brief review of polymer and metal feedstock will be provided. Here, AM process demands limit the types of feedstock that may be used. Finally, current research at The University of Texas at Austin related to polymer mechanical properties in laser sintering will be presented. It is demonstrated that the usual energy density approach to part quality is not completely satisfactory. A new approach based on the total part thermal exposure (laser and part bed temperature) is adequate to predict a more complete range of part mechanical properties.
报告人简介：
Dr. David L. Bourell is the Temple Foundation Professor of Mechanical Engineering at The University of Texas at Austin. Dr. Bourell's areas of research include particulate processing with emphasis on sintering kinetics and densification, and materials issues associated with Laser Sintering (LS). Professor Bourell is a leading expert in advanced materials for Laser Sintering, having worked in this area since 1988. Heholds 9 primary patents dealing with materials innovations in LS dating back to 1990 and has published 250 papers in journals, conference proceedings and book chapters. Dr. Bourell is a Fellow of ASM International and TMS, and he is also a lifetime member of TMS. In 2009, he received the TMS Materials Processing and Manufacturing Division Distinguished Scientist/Engineer Award. In 2017, he received the Society of Manufacturing Engineers Albert M. Sargent Progress Award for “significant accomplishments in the field of manufacturing processes”.
（二）美国密苏里科技大学Leu教授学术报告
报告题目：Additive Manufacturing Technologies, Applications and Future Opportunities
报告人：Ming C. Leu
报告时间：3月7日上午10:00-10:45
地点：教一411
主办单位：流体动力与机电系统国家重点实验室
报告摘要：Commonly known as 3D Printing, Additive Manufacturing (AM) is a suite of computer automated processes that fabricate three-dimensional physical objects layer by layer from Computer-Aided Design (CAD) models. AM offers significant advantages over conventional manufacturing processes in producing one-of-a-kind parts or small batches, especially for those with geometric and/or material complexities. It holds great promise for the future as a tool-less, light-out manufacturing technology for advanced components and products made of metals, polymers, ceramics and composites. This seminar will first give an overview of AM technologies and their working principles, along with an overview of AM markets including products, materials and services. A summary of AM advantages and representative applications in the aerospace, automotive, healthcare and other industries will the follow. Some recent advances in AM technologies, including those due to Missouri S&T research efforts, will then be presented. Finally, future AM research and innovation opportunities will be envisioned.
报告人简介：
Dr. Ming C. Leu is the Keith and Pat Bailey Distinguished Professor in the Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, where he is also the Director of the Intelligent Systems Center. He founded Missouri S&T’s Center for Aerospace Manufacturing Technologies in 2004 and has been serving as its director until 2016. Prior to joining Missouri S&T, he was a Program Director at the National Science Foundation, 1996-1999, the State Chair Professor in Manufacturing Productivity at the New Jersey Institute of Technology, 1987-1996, and a faculty member at Cornell University. Professor Leu obtained his Ph.D. degree in 1981 from the University of California at Berkeley, his M.S. degree in 1977 from the Pennsylvania State University, and his B.S. degree in 1972 from the National Taiwan University, all in Mechanical Engineering. Dr. Leu’s research interests include additive manufacturing, cyber-physical manufacturing, robotics and automation, and product lifecycle management. He has published over 450 papers in professional journals and refereed conference proceedings, as well one e-book, 10 book chapters, and 4 U.S. patents. His publications have received over 10,000 citations, with an h-index of 49. Dr. Leu has received numerous professional awards including, among others, the ASME Milton C. Shaw Manufacturing Research Medal (2018), University of Missouri President’s Leadership Award (2017), ASME Blackall Machine Tool and Gage Award (2014), ISFA Hideo Hanafusa Outstanding Investigator Award (2008), ASME Distinguished Service Award (2004), SME University Lead Award (1994), NJIT Harlan J. Perlis Research Award (1993), NSF Presidential Young Investigator Award (1985), SAE Ralph R. Teetor Education Award (1985), as well as several best paper awards. He was elected to SME Fellow in 2018, CIRP Fellow in 2008, and ASME Fellow in 1993, and is a member of Sigma Xi, Tau Beta Pi, and Phi Kappa Phi honor societies.
（三）美国密苏里科技大学Yang Li博士学术报告
报告题目：Design for Additive Manufacturing Lightweight Structure: About geometry and manufacturability
报告人：Yang Li
报告时间：3月7日上午10:45-11:30
地点：教一411
主办单位：流体动力与机电系统国家重点实验室
报告摘要：Having been involved in additive manufacturing since 1993, the University of Louisville (UofL) is extensively involved in various area of AM research. With over 50 personnel across engineering, medical and dental disciplines, the AM research at UofL currently has strong emphasis towards bridging the gap between AM technologies and various applications. Some of the notable research areas of focus include the process modeling and optimization, the development of novel process strategies, the design optimization of structures, qualification of AM parts, medical implants, dental prostheses, surgical devices, cardiovascular tissue engineering, and AM energy devices. These activities are supported by various centers and facilities including Rapid Prototyping Center (RPC), Additive Manufacturing Competency Center (AMCC), and Material Innovation Guild (MIG).
In the area of AM lightweight structure design, various efforts have been focused on identifying the unique challenges of the use of AM in the design and realization of lightweight structures for potential applications in aerospace and biomedical areas. Utilizing a combination of analytical modeling, numerical analysis and experimentation, various design aspects such as geometry, material and process are studied. From the geometry design perspective, much of the works are dedicated to identify the non-ideal boundary conditions for the finite-size cellular structure designs and their impact to various performance of the structures, which deviate significantly from the classic theories. From the manufacturability perspective, due to the unique process characteristics of AM, the material properties are potentially coupled with the geometry design of the lightweight features, which have been subjected to extensive investigations. Preliminary results have shown that the materials for AM lightweight feature should be treated as a unique class of heterogeneous materials that must be integrated in the design stage as non-independent factors.
报告人简介：
Dr. Li Yang is an Assistant Professor in the Department of Industrial Engineering at University of Louisville. He received Ph.D. degree in 2011 from the Department of Industrial and System Engineering at North Carolina State University, and master’s and bachelor’s degrees both in Department of Mechanical Engineering at Tsinghua University. Dr. Yang’s research interest focuses on multiple areas, including the design of lightweight structures, novel material process development using binder jetting, as well as the application of novel materials and structures utilizing additive manufacturing. Dr. Yang received the Emerald Engineering Outstanding Doctoral Research Award in 2013, Best Paper Award in 25th International Solid Freeform Fabrication (SFF) Symposium in 2014, International Outstanding Young Researcher in Additive Manufacturing Award in 2016, and BASF 3D-Printing Design Contest Winner Award in 2018.