報告人：Daniel Inman（Professor and Department Chair, Aerospace Engineering, University of Michigan）
時間：2016年5月 18日（周三）下午 2:30
地點：明故宮校區18号樓529報告廳
主辦單位：國際合作交流處、科協、機械結構力學及控制國家重點實驗室、航空宇航學院
Abstract
Mitigating high cycle fatigue and failure due to vibration is a major financial cost to businesses (6-billion dollar industry in the US alone). Reduction in performance due to vibration-induced high cycle fatigue often ends in catastrophic failures and loss of life. Before failure is detected vibration induced fatigue results in repair and loss of service in all types of structures ranging from electronic boards to aircraft and large civil structures. It is proposed to create a unique class of structural materials capable of vibration suppression employing a new concept of metamaterials to replace current technology (viscoelastic materials, particle dampers and vibration absorbers). Metamaterial concepts have recently been introduced using absorber inserts in a chiral lattice structure to provide vibration mitigation but fall short of a general solution. Viscoelastic materials are frequency and temperature dependent, vibration absorbers require large mass and moving parts, and the current metamaterial approach is relatively narrow band and not scalable to low frequency vibration. Proposed solutions to these problems are presented by providing a general metastructure solution based on novel geometries and multi-physics effects. The design, analysis and experimental validation of initially concepts are presented that provide broadband vibration suppression using metamaterial, nonlinear vibration concepts, and induced magnetic fields.
Daniel Inman (AIAA Fellow, ASME Fellow, AAM Fellow) is active in research involving smart materials and structures as applied to morphing aircraft, energy harvesting, structural health monitoring and clearance control in jet engines. He currently has projects in gust alleviation in UAVs, cable harnessed satellites and wind turbine blade monitoring. Formerly he was the Director of the Center for Intelligent Material Systems and Structures and the G.R. Goodson Professor in the Department of Mechanical Engineering at Virginia Tech and the Brunel Chair in Intelligent Materials and Structures at the University of Bristol, UK. A former Department Chair of the Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, he has held adjunct positions in the Division of Applied Math at Brown University and in math at the University of Southern California. Since 1980, he has published 8 books (on vibration, control, statics, and dynamics), eight software manuals, 20 book chapters, 254 journal papers and 511 proceedings papers, given 48 keynote or plenary lectures, graduated 55 Ph.D. students and supervised more than 75 MS degrees. He received more than 10 awards, including AIAA Structures Dynamics and Materials Award. Currently, he is the Editor-in-Chief of JIMSS.
