CAMP Annual Report: Page 11
Figure 4. (A) Cellular structure of Alporas aluminum foam (Shinko Wire Co.). (B-C) Maps of surface axial strain (%) for the first cycle and failure cycle. (C) Dark red zone corresponds to the crack location at failure. (B) Orange zone represents damage accumulated during the first cycle, corresponding to the future crack location.
Professors Kathleen Issen and David Morrison and their research group are investigating the mechanical behavior of porous aluminum foams. Due to the cellular structure of aluminum foams (see Figure 4A), these lightweight materials have good strength and stiffness to weight ratios, suitable for use in air, space, marine and ground vehicles. Recent low cycle tension-compression fatigue tests provided several significant results. For example, although the strain amplitudes used in this work were significantly below those for failure under monotonic loading, damage began to accumulate during the first few cycles. These initial damage zones intensify under continued cycling, leading to formation and propagation of a through-going crack. The onset and evolution of damage were examined using digital image correlation. Figures 4B and 4C show surface axial strain for the first cycle and failure cycle, respectively. At failure, the dark red zone represents intense local tensile deformation, corresponding to the crack location. During the first cycle, less intense localized tensile strain (orange zone) is observed at the same location. Future work includes examination of open cell foams and failure processes under axial-torsional fatigueMonitoring and Modeling of Composite and Smart Structures
Professor Ratan Jha, of Clarkson’s Department of Mechanical and Aeronautical Engineering, has conducted research in structural health monitoring, modeling of composite and smart structures, adaptive control of structural vibrations, intelligent flight controls, and multidisciplinary design optimization. He has established the Smart Structures Laboratory at Clarkson University which is well equipped for vibration measurement and control experiments, including a scanning laser vibrometer. Dr. Jha’s contributions include both theoretical and experimental research which have resulted in over 60 publications in international archival journals and refereed conferences. He was awarded the Graham Faculty Research Award by Clarkson University in 2005. Dr. Jha is an Associate Fellow of the American Institute of Aeronautics and Astronautics (AIAA) and a member of ASME and ASEE. He is a member of the AIAA Adaptive Structures Technical Committee and has served as Session Chair/Co-Chair for Adaptive Structures Conferences. Dr. Jha has received research grants from the National Science Foundation, NASA, the US Army, the New York State Energy Research and Development Authority, Pratt & Whitney, and other industries. Prior to joining Clarkson, he worked in the aerospace industry from 1983 to 1995 where he led a team of engineers working on conceptual and preliminary designs of combat aircraft.
Wireless Sensor Network for Transportation Infrastructure Monitoring
Associate Professor Kerop Janoyan and graduate students, in the Civil and Environmental Engineering Department at Clarkson, continue to work on developing and deploying novel wireless sensors and sensor networks for applications in industrial process monitoring, quality control, and in civil infrastructure structural health monitoring. America’s aging transportation infrastructure is an issue of serious concern in the U.S., especially in light of recent bridge collapses. That has brought promising bridge monitoring research by Clarkson University Professor Kerop Janoyan and his research group to national attention. The project, developing an innovative method for monitoring the health of civil infrastructure using wireless sensor technology, has received state and federal funding as well as a feature story in the New York Times. The article can be accessed through: http://www.nytimes.com/2007/11/01/us/01bridge.html
More information can be found on the Laboratory for Intelligent Infrastructure and Transportation Technologies (LIITT) web page: http://web2.clarkson.edu/projects/liitt/.
The Laboratory for Intelligent Infrastructure and Transportation Technologies (LIITT) at Clarkson University follows an interdisciplinary approach to addressing the needs of managing an aging national infrastructure. The laboratory focuses on utilizing emerging technologies to address existing challenges and new demands in the transportation and infrastructure sectors.
Clarkson Professor Liya Regel Delivers Keynote Address at STEM Conference in Alabama
Dr. Liya L. Regel, professor of electrical engineering and director of the International Center for Gravity Materials Science and Applications at Clarkson University, delivered the keynote address for the STEM (Science, Technology, Engineering and Mathematics) Day at Alabama A&M University in Huntsville, Alabama during the month of April. In her lecture, titled "The Unique Role of STEM in the 21st Century," Regel briefly described her own research results, predicted the most important new developments in science, engineering in the 21st century, and emphasized the unique role to be played by STEM. As a finale, she treated the audience to a sound and image show of her latest music composition, as an illustration of the increasing role of STEM in art and music.
Regel pioneered research on materials processing in large centrifuges and on high-energy heavy-ion implantation in semiconductors, magnetic semiconductors and rare-earth materials. She has made significant contributions to materials science in space. She received a U.S. patent for her breakthrough methods for diamond film deposition at low temperature and pressure. She has more than 265 scientific papers, six solo monographs published in Russia, the U.S., and France; edited six books and conference proceedings published in the UK, Russia, and the U.S.; and presented numerous keynote addresses, plenary lectures and invited seminars at national and international scientific meetings, universities and companies around the world.
Educated in Russia, she holds that country's highest degree, the Doctor of Sciences, in physics and mathematics, in addition to a Ph.D. in physics and mathematical sciences (solid state physics). She has many awards and recognitions from professional and private organizations, including an honorary doctor of science from Clarkson University (2002) and an honorary doctor of science from Alabama A&M University (2006)