Keynote Speakers


Xiaoping Qian

Department of Mechanical Engineering
University of Wisconsin-Madison

Xiaoping Qian is the Elmer and Janet Kaiser Professor in Mechanical Engineering at the University of Wisconsin-Madison. His research focuses on computational design of multi-physics systems, topology optimization, shape optimization, and design for additive manufacturing. At UW-Madison, he teaches courses in Computer-Aided Geometric Design and Machine Design. He has served as an associate editor for journal Computer-Aided Design, ASME Journal of Mechanical Design, Journal of Computing and Information Science in Engineering, and Journal of Manufacturing Science and Engineering. He is an elected ASME fellow. He obtained his BS from Huazhong University of Science and Technology, China and his Ph.D. from the University of Michigan in USA.

Title: Topology optimization for additive manufacturing

Abstract: Additive manufacturing (AM) is capable of building parts of complex shapes that are difficult to produce with conventional manufacturing processes. Such shape flexibility opens up unprecedented design possibilities and has disruptive potentials for multiple technological fields. AM also promises to enable on-demand manufacturing and supply chains. In order to realize full potentials of AM technologies, it becomes imperative to produce parts of complex, hitherto geometries with minimum scrap waste and little lead time.
In this talk, I will present our recent work in accounting for AM constraints during topology optimization. A direction-derivative based formulation has been developed to account for AM constraints during density-based topology optimization. It can control undercut, overhang angle and build orientation in a differential manner with respect to density variation. It thus nables gradient-based simultaneous optimization of topological layout and build direction. The resulting optimized designs can be printed without support structures.




Sylvain Lefebvre


Sylvain Lefebvre is a senior researcher at Inria (France), where he leads the MFX team. His main research focus is to simplify content creation, synthesizing highly detailed patterns, structures and shapes, with applications in Computer Graphics and Additive Manufacturing. Sylvain received the EUROGRAPHICS Young Researcher Award in 2010. From 2012 to 2017 he was the principal investigator of the ERC ShapeForge (StG) and IceXL (PoC) projects. He created and is the lead developer of the IceSL software for modeling for additive manufacturing.

Title: Filling the voids: how to infill (or not!) a 3D print

Abstract: A key capability of Additive Manufacturing is the ability to produce complex inner structures within fabricated objects. In this presentation, I will introduce some recent techniques we developed to change the way the inner volume of an object is 3D printed. We will see how this directly impacts fabrication time and material use, and how this can give specific properties to the object, such as changing the way it deforms, or creating color and property gradients.

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