CEE 200 Seminar: 9/29

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Micro-scale texture statistics and fracture parameters of gas shale
Mija Helena Hubler
Assistant Professor at the University of Colorado at Boulder

The efficient extraction of natural gas from shale relies heavily on our evaluation of the maturity and mechanical properties of gas shale. Current measurement methods of maturity and mechanical properties are not convenient and reliable. This lecture explores the application of two small scale testing methods for application to this problem. First, microscale computed tomography scans are informed with nano-indentation data and analyzed using spatial statistics to evaluate changes in topology as an indicator for maturity. Secondly, mico-scale scratch tests are conducted and analyzed using fracture mechanics to obtain fracture parameters. This evaluation is done considering an intrinsic size effect formulation to allow for the development of a fracture process length. The results suggest these measurement methods provide unique insights into the fracture behavior of shale and may be promising for the evaluation of shale after further development.
 
Where:        Kinsey Pavilion 1200B
When:         4 p.m., Tuesday, September 29, 2015
 
Dr. Mija H. Hubler is an Assistant Professor at the University of Colorado at Boulder. She earned a PhD with a focus in structural engineering from Northwestern University in 2006 where she developed and authored the 2014 International RILEM Recommendation Model B4 for Creep and Shrinkage of Concrete. Dr. Hubler now actively conducts research in the general field of mechanics and degradation of construction materials with particular interest in understanding the effects of inclusions and defects on fracture and long-term performance parameters. Dr. Hubler’s research has resulted in over twenty published articles in the major mechanics and engineering journals and one book chapter in Handbook of Damage Mechanics: ISBN 978-1-4614-5588-2.

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