CAMP Annual Report: Page 11
Aerosol Characterization and Instrumentation Research
The research interests of Professor Suresh Dhaniyala, Associate Professor in Clarkson’s Department of Mechanical and Aeronautical Engineering, are in the detection and characterization of airborne particles. Professor Dhaniyala and his group are developing novel particle collection devices, compact instruments for distributed aerosol measurements, and sensitive instruments for high-resolution aerosol sizing and compositional characterization. Recently, Professor Dhaniyala and his group developed a near real-time instrument for particle size distribution measurements over a size range of 1.6-1000 nm. This instrument has been deployed for particle size distribution measurements in the atmosphere and for mobile source emission characterization. Professor Dhaniyala and his group are conducting chassis-dynamometer based measurements of light-duty diesel engine performance as a function of fuel types, engine operating conditions, and emission control strategies. Funding sources for these projects include the NSF, NYSERDA, NASA, and the EPA.
CAMP Professor Sulapha Peethamparan, in Clarkson University’s Department of Civil and Environmental Engineering, is carrying out research to develop sustainable infrastructure materials by alkali activation of alumino-silicate containing industrial by-products, using high volume fly ash, slag and other industrial by-products such as cement kiln dusts. She is also interested in the mechanism of Portland and oil well cement hydration; the setting kinetics of cements; micro-/nano-scale characterization of cement/cementitious materials; forensic analyses of deteriorated concrete; and lime/cementitious soil stabilization. In addition, she is interested in CO2 sequestration using industrial alkaline byproducts via mineral carbonation.
This past summer, Clarkson Honors Program student Orion Kafka with Professors Kathleen Issen and David Morrison used Clarkson’s General Electric Phoenix Nanotom 180 Micro-CT scanner to identify fatigue cracking processes in Alporas aluminum foam. Aluminum foam exhibits attractive characteristics such as high strength and stiffness to weight ratios, good acoustic absorption, good vibration damping, and high thermal conductivity. However, under some cyclic loading conditions, the materials are susceptible to fatigue cracking. Using optical and electron microscopes, only the surface of the fatigue specimen can be evaluated for cracks. However, the Micro-CT scanner provides a three-dimensional view of the entire volume of the fatigue specimen.
Figure 4 shows an interior slice of a fatigue specimen, and a large crack is clearly evident running from the lower left to the upper right. By analyzing many of these slices, Orion determined that the cracking mode is significantly affected by the magnitude of the strain amplitude at which the specimen is cycled. For example, Figure 5 shows cracking patterns in specimens cycled at high strain amplitude 5(a) and low strain amplitude 5(b). Preliminary results indicate that at higher strain amplitudes (above 0.1%) cracks occur primarily in a planar zone and at lower strain amplitudes (at or below 0.1%) cracks occur in a diffuse field. At higher strain, cracks tend to propagate through cell walls; while at lower strain, cracks tend to open in a single cell wall or in two adjacent cell walls. Future research will include studying crack initiation and growth in the aluminum foam.
CAMP’s Dr. Dana Barry Wins 17th Consecutive APEX Award and Serves as Visiting Professor in Japan
Visiting Professor Dana Barry speaks with the President of Suzuka National College of Technology, Professor Yasutsugu Nitta.
Dr. Dana M. Barry, senior technical writer and editor at Clarkson University’s Center for Advanced Materials Processing (CAMP), won her 17th consecutive APEX Award for Publication Excellence from Communications Concepts Inc. in Springfield, Va. This honor is based on editorial content and overall communications effectiveness and excellence. Her winning entry (for 2012) was the CAMP Annual Report Newsletter (2010-2011), which faired extremely well in the competition. There were more than 3,300 entries from the United States and other countries in the competition. Approximately 1000 Awards of Excellence were distributed in 130 subcategories of 11 major areas.
In addition, Dr. Barry (a Professor and Scientific Board President for Ansted University) served as a Visiting Professor at Suzuka National College of Technology (SNCT), Japan, during the month of May. She gave lectures about Entrepreneur Education and Creativity. She also presented a paper about Problem Based Learning in a Virtual Environment (authored by D.M. Barry et. al. and published by Springer in 2012) at the International Conference on Intelligent Multimedia Systems and Services held in Gifu, Japan. Her research collaborator in Japan is Dean Professor Hideyuki Kanematsu of SNCT.