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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Stress Corrosion Cracking Resistance Of Cold-Sprayed Al 6061 Deposits Using A Newly Developed Test Fixture, Mala M. Sharma, Jeremy Schreiber, Timothy Eden, Victor Champagne
Stress Corrosion Cracking Resistance Of Cold-Sprayed Al 6061 Deposits Using A Newly Developed Test Fixture, Mala M. Sharma, Jeremy Schreiber, Timothy Eden, Victor Champagne
Faculty Journal Articles
The stress corrosion cracking (SCC) response of Al 6061 bulk deposits produced by high-pressure cold spray (HPCS) was investigated and compared to commercial wrought Al 6061-T6 material. Representative tensile coupons were stressed to 25%, 65% and 85% of their respective yield strength and exposed to ASTM B117 salt fog for 90 days. After exposure, the samples were mechanically tested to failure, and subsequently investigated for stress corrosion cracking via optical and scanning electron microscopy with energy-dispersive X-ray spectroscopy (EDS). The results were compared to the wrought Al 6061-T6 properties and correlated with the observed microstructures. Wrought samples showed the initiation …
Measurement And Prediction Of Discharge Coefficients In Highly Compressible Pulsating Flows To Improve Egr Flow Estimation And Modeling Of Engine Flows, Indranil Brahma
Measurement And Prediction Of Discharge Coefficients In Highly Compressible Pulsating Flows To Improve Egr Flow Estimation And Modeling Of Engine Flows, Indranil Brahma
Faculty Journal Articles
An assumption of constant discharge coefficient (Cd) is often made when modeling highly compressible pulsating engine flows through valves or other restrictions. Similarly, orifices and flow-nozzles used for real-time EGR flow estimation are often calibrated at a few steady-state points with one single constant Cd that minimizes the error over the selected points. This quasi-steady assumption is based on asymptotically constant Cd observed at high Reynolds number for steady (non-pulsating) flow. It has been shown in this work that this assumption is not accurate for pulsating flow, particularly at large amplitudes and low flow rates. …
Solar Thermoelectricity Via Advanced Latent Heat Storage, Michele L. Olsen, Eric S. Toberer, David S. Ginley, Philip A. Parilla, Emily L. Warren, Aaron D. Martinez, Jonathan E. Rea, Corey Lee Hardin, Christopher J. Oshman, Nathan P. Siegel
Solar Thermoelectricity Via Advanced Latent Heat Storage, Michele L. Olsen, Eric S. Toberer, David S. Ginley, Philip A. Parilla, Emily L. Warren, Aaron D. Martinez, Jonathan E. Rea, Corey Lee Hardin, Christopher J. Oshman, Nathan P. Siegel
Other Faculty Research and Publications
An aspect of the present disclosure is a system that includes a thermal valve having a first position and a second position, a heat transfer fluid, and an energy converter where, when in the first position, the thermal valve prevents the transfer of heat from the heat transfer fluid to the energy converter, and when in the second position, the thermal valve allows the transfer of heat from the heat transfer fluid to the energy converter, such that at least a portion of the heat transferred is converted to electricity by the energy converter.
Solar Powered Atmospheric Water Generation, Ben Conser
Solar Powered Atmospheric Water Generation, Ben Conser
Master’s Theses
Several atmospheric water generation (AWG) system configurations were analyzed to determine the feasibility of AWG as a method to combat water stress. In order to best combat water stress, AWG must be implemented in such a way which minimizes the energetic and monetary cost of water production. Thermodynamic and economic analyses were used to compare the performance of several AWG system configurations. Metrics such as specific energy consumption (SEC) and levelized cost of water (LCOW), which measure the energetic and monetary cost of water production respectively, were used to compare each system. Using this approach, the optimal system configuration was …
Analysis And Control Of Fiber-Reinforced Elastomeric Enclosures (Frees), Soheil Habibian
Analysis And Control Of Fiber-Reinforced Elastomeric Enclosures (Frees), Soheil Habibian
Master’s Theses
While rigid robots are extensively used in various applications, they are limited in the tasks they can perform and can be unsafe in close human-robot interactions. Soft robots on the other hand surpass the capabilities of rigid robots in several ways, such as compatibility with the work environments, degrees of freedom, manufacturing costs, and safe interactions with the environment. This thesis studies the behavior of Fiber-Reinforced Elastomeric Enclosures (FREEs) as a particular type of soft pneumatic actuator that can be used in soft manipulators. A dynamic lumped-parameter model is created to simulate the motion of a single FREE under various …
Development Of Physics Based Machine Learning Algorithms, Rob Jennings
Development Of Physics Based Machine Learning Algorithms, Rob Jennings
Master’s Theses
In this study, a baseball pitch was examined to try to understand its behavior, and make a predictive model of it. A baseball pitch was tested experimentally with a wind tunnel and modeled computationally with COMSOL CFD software. Five input variables (spin rate, sting angle, seam orientation: Y axis, seam orientation: Z axis, and air velocity) were controlled, with force in three axes recorded as outputs. The experimental and computational results were examined and seen to be interdependent for all input variables. Experimental and computational data were both insufficient for predicting system behavior. Experimental data collection would have required an …