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2013

Hogan, James, Schneider, Markus, Rogers, Robert, Spray, John, Vincent, Gregory

The dynamic fragmentation of coarse and fine grained granitoid blocks during impact has been examined for energies of 1.9 kJ to 3.0 kJ and 2.7 kJ to 6.8 kJ, respectively. A particle tracking algorithm was developed to measure ejecta size and velocity at the rear of the target for a horizontal...

2020-07-01

Lo, Calvin, Sano, Tomoko, Hogan, James D.

We investigated the uniaxial compressive behavior of damaged and intact alumina using quantitative X-ray computed tomography (XCT) analysis coupled with digital image correlation (DIC) for mechanical characterization. Internal three-dimensional crack characteristics such as crack surface area and...

Fall 2010

Ruhl, Mark Jason

Thermal management and energy input are required to maintain working fluids, i.e., liquefied natural gas, liquid nitrogen, and multi-phase fluids within their optimal working conditions. Increasing a pipes’ thermal resistance, e.g., utilizing vacuum insulation, is one method of minimizing energy...

Fall 2009

Singh, Shikhar

This study develops the water requirement factors for different thermo-chemical and biochemical biomass conversion pathways for production of biofuels and biopower. Twelve biomass conversion pathways based on six biomass feedstocks are assessed. For all these pathways integrated water and...

2015

Ramesh, K. , Plescia, J.B., Hogan, J.D., Mir, C.E.

Improvements in computational and analytical modelling of large-scale impact and catastrophic disruption events will come from a better understanding of the failure processes that are active during high strain-rate events. In this study we investigate the dynamic compressive failure and...

2013

Rogers, Robert, Spray, John, Hogan, James

The dynamic fragmentation of planetary materials during impact into finite targets has been examined. A particle tracking algorithm was implemented to estimate the size and velocity of fragments ejected from the rear of the target. A total of 76 experiments were performed for four material,...

2013-01-01

Hogan, James, Vincent, Gregory, Spray, John, Rogers, Robert, Schneider, Markus

Ejecta velocity measurements were made during impacts into solid planetary materials. Ejecta velocity fields overlie each other when normalized by vmax, v50%mass, and v50%KE; these correspond to the maximum velocity and median values of mass and kinetic energy among ejecta velocities....

2021-03-01

Koch, Brendan M.L., Lo, Calvin, Li, Haoyang, Sano, Tomoko, Ligda, Jonathan, Hogan, James D.

This paper explores the compressive responses of alumina ceramics subjected to various levels of pre-damage via internal cracking. Pre-damage is achieved by subjecting the samples to thermal shock. Mechanical loading is performed using a load frame for quasi-static strain rates and a Kolsky bar...

Spring 2013

Moraes, Thania Gislaine Vasconcelos de

The effects of broiler breeder dietary energy and protein during rearing and dietary energy level of lay diets on egg composition, offspring performance and carcass yield were evaluated. Pullets were fed a diet containing high ME (2,736 kcal/kg; HEREAR), or low ME (2,528 kcal/kg; LEREAR) combined...

Fall 2009

Mussbacher, Scott Louis

The extraction of bitumen (heavy oil) from the oil sands is predominantly achieved through a water-based technology. This involves a slurrying process, typically called conditioning, which is categorized into three equally important steps: bitumen-sand liberation, bitumen coalescence, and...