报告时间：2019年9月24日（星期二）15:20-15:40
报告地点：机械楼214
报 告 人：Robert Chisena
工作单位：University of Michigan Ann Arbo
举办单位：机械工程学院
报告人简介：
Dr. Robert Chisena completed his undergraduate degree at the Pennsylvania State University and his PhD degree at the University of Michigan in Mechanical Engineering. During his PhD, Dr. Chisena’s research was on the manufacturing, inspection, and mechanics of additive manufactured parts. His developments were in two areas: a specialized additive manufacturing wave infill for mechanical property tuning and the automated inspection of additive manufactured parts using computed tomography. Additionally, Dr. Chisena is studying atherosclerosis, the number one cause of death in the world, and is developing a cardiovascular device for its treatment. Dr. Chisena is progressing this device through the regulatory and testing process in the United States.
报告简介：
Dr. Chisena’s first will talk about his time at the Pennsylvania State University and the University of Michigan to provide a perspective on life, how to study, and how to perform research.
Dr. Chisena’s second presentation will describe his PhD work on the material extrusion of ankle-foot orthoses. Material extrusion (MEX), also known as fused deposition modeling (FDM), is an additive manufacturing (AM) process that deposits a molten thermoplastic material layer-by-layer from a heated nozzle. This talk will discuss the use of MEX in the fabrication of the thin-walled structure (TWS), such as the ankle-foot orthosis (AFO). Three requirements for the AFO and other TWSs fabricated by MEX are that they are lightweight and durable and have tunable structural stiffness.
This research shows: (1) the wave infill can be used to generate a lightweight TWS with tunable structural stiffness, (2) CSM is a powerful finite element technique that may be used to design MEX wave infill TWSs, (3) CT and MMGD may be used to quantify the internal structure of MEX filaments and parts, and (4) voids from the MEX process occur at interfaces between layers, possibly due to large thermal gradients and plastic shrinkage. This research will inform and improve the MEX fabrication process to fabricate TWSs with tunable structural stiffnesses and are lightweight and durable.
2019-09-21
