Department of Mechanical Engineering
The University of Texas at El Paso
题目: Multifunctional Composites for enhanced Structural Safety and Performance
The demanding of developing multifunctional material is driven by the need of new materials that could simultaneously carry structural loading and provide system performance related functionalities to reduce overall weight and complexity. Multifunctional materials are composites in nature since most of them contain multiple constituents for different applications, such as sensing, energy harvesting, and storage. Research in this area has grown rapidly due to the safety and performance enhancing benefits offered by this class of materials. This presentation will introduce the development of two multifunctional composites with piezoelectric interphases on both micro and nano scales. Both interphases exist between the reinforcing fiber and polymer matrix of composites, with one of the design developed to maximize multifunctionality while the other to maximize mechanical strength. The first design details by applying a piezoceramic film onto a conductive structural fiber, which carries mechanical loading and serves as one electrode for system related application such as sensing and actuation. The second design grows a piezoelectric nanowire arrays on the surface of carbon fibers, which significantly enhanced the interfacial strength of the composites. Due to the piezoelectric nature of the nanowire, this interphase could also provide a variety of system performance-related functionalities to the structure. The synthesis and characterization of each of the multifunctional composites will be presented and functional response will be highlighted. This talk will conclude with a discussion of future application of these multifunctional composites and current research effort being pursed and future direction of my research program.
Dr. Yirong Lin is currently an Assistant Professor in Department of Mechanical Engineering the University of Texas at El Paso. Before that, he was a postdoc at University of Florida and Arizona State University from 2009 to 2011. He received his Ph.D. degree in Mechanical Engineering from Arizona State University in 2009. His research interests include multifunctional materials, smart materials, active nanocomposites, and carbon-based nanomaterials such as carbon nanotubes and graphene. He has published or submitted 45 technical articles since 2007 (24 referred journals and 23 conference proceedings). He was awarded the Best Paper at SAMPE 2008 fall technical conference, Honorable Mentioned Best Student Paper at SMASIS 2009 fall conference and ASME Best Paper in Materials of 2010 at SPIE Smart Materials/NDE 2011 conference. He is a member of ASME, SPIE, SAMPE and AIAA.