Nanoscale Quantification of Interfacial Degradation in Fiber-reinforced
Composites Subjected to Multiple Environments
Dr. Raman P. Singh
Associate Dean for Engineering at OSU-Tulsa Director, Helmerich Advanced Technology Research Center Helmerich Family Endowed Chair Professor of Engineering
Professor and Head, School of Materials Science and Engineering Professor, School of Mechanical and Aerospace Engineering
College of Engineering, Architecture & Technology Oklahoma State University
526 N. Elgin Avenue
247 Helmerich Research Center Tulsa, OK 74106
Abstract
This talk presents an overview of studies conducted to investigate the long- term durability of fiber-reinforced composites and polymeric materials that are exposed to fatigue loading and multiple environments. It is shown that synergistic degradation mechanisms that occur upon combined exposure to ultraviolet radiation and water condensation lead to extensive deterioration of mechanical properties. Effects of fatigue loading are discussed, especially in conjunction with environmental degradation. The deterioration of me- chanical properties in the fiber–matrix interphase region is quantified, as a function of degradation, by the use of quantitative atomic force microscopy based indentation. Surrogate modeling based inverse analysis is established as a technique to extract quantitative mechanical properties from inden- tation data. The presentation concludes with an overview of the research capabilities available at the Mechanics of Advanced Materials Laboratory and discusses areas of possible collaboration.
Brief Biography
Dr. Raman P. Singh serves as the Associate Dean for Engineering at OSU- Tulsa, the Director of the Helmerich Advanced Technology Research Center, Helmerich Family Endowed Chair Professor of Engineering, Professor and Head for the School of Materials Science and Engineering, and Professor for the School of Mechanical and Aerospace Engineering, in the College of En- gineering, Architecture and Technology at Oklahoma State University. He holds M.S. and Ph.D. degrees in Mechanical Engineering and Applied Me- chanics from the University of Rhode Island, and a B.Tech. degree from the Indian Institute of Technology in Kanpur, India. Prior to joining Oklahoma State University in 2006 he was a faculty member at the State University of New York at Stony Brook, and before that a post-doctoral scholar at the California Institute of Technology.
Raman’s academic interests are in student mentorship, development, and retention with a focus on new pedagogical methods. His research in- terests are in the mechanics of advanced materials, with an emphasis on the investigation of modern engineered materials and development of new techniques for mechanical characterization at highly localized length scales. His research has been funded by the National Science Foundation, NASA, the Oklahoma Center for the Advancement of Science & Technology, the Oklahoma Transportation Commission, the US Army Research Office, the Department of Energy, and industry. He has authored or co-authored sev- eral archival journal publications and conference proceedings and holds two patents. He is an active member of the Society of Experimental Mechanics (SEM) and the American Society of Engineering Education (ASEE). He has served as an Associate Technical Editor for Experimental Mechanics the flag- ship journal of the Society of Experimental Mechanics. Besides academia, Raman enjoys travel, backpacking, being a life-long student, photography, and spending time with his two daughters. He is also an aspiring author and public speaker.
生物与农业工程学院
2016年10月18日
