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Full-Text Articles in Engineering
A Model For Sustainable Humanitarian Engineering Projects, Evan A. Thomas, Bernard Amadei, Robyn Sandekian
A Model For Sustainable Humanitarian Engineering Projects, Evan A. Thomas, Bernard Amadei, Robyn Sandekian
Mechanical and Materials Engineering Faculty Publications and Presentations
The engineering profession should embrace a new mission statement?to contribute to the building of a more sustainable, stable, and equitable world. Recently, engineering students and professionals in the United States have shown strong interest in directly addressing the needs of developing communities worldwide. That interest has taken the form of short-and medium-term international trips through Engineers Without Borders?USA and similar organizations. There are also several instances where this kind of outreach work has been integrated into engineering education at various US institutions such as the University of Colorado at Boulder. This paper addresses the challenges and opportunities associated with balancing …
Optical Acquisition And Polar Decomposition Of The Full-Field Deformation Gradient Tensor Within A Fracture Callus, Wangdo Kim, Sean S. Kohles
Optical Acquisition And Polar Decomposition Of The Full-Field Deformation Gradient Tensor Within A Fracture Callus, Wangdo Kim, Sean S. Kohles
Mechanical and Materials Engineering Faculty Publications and Presentations
Tracking tissue deformation is often hampered by material inhomogeneity, so local measurements tend to be insufficient thus lending to the necessity of full-field optical measurements. This study presents a novel approach to factoring heterogeneous deformation of soft and hard tissues in a fracture callus by introducing an anisotropic metric derived from the deformation gradient tensor (F). The deformation gradient tensor contains all the information available in a Green-Lagrange strain tensor, plus the rigid-body rotational components. A recent study [Bottlang et al., J. Biomech. 41(3), 2008] produced full-field strains within ovine fracture calluses acquired through the application of electronic speckle pattern …
Developing Sustainable Spacecraft Water Management Systems, Evan A. Thomas, David M. Klaus
Developing Sustainable Spacecraft Water Management Systems, Evan A. Thomas, David M. Klaus
Mechanical and Materials Engineering Faculty Publications and Presentations
It is well recognized that water handling systems used in a spacecraft are prone to failure caused by biofouling and mineral scaling, which can clog mechanical systems and degrade the performance of capillary-based technologies. Long duration spaceflight applications, such as extended stays at a Lunar Outpost or during a Mars transit mission, will increasingly benefit from hardware that is generally more robust and operationally sustainable overtime. This paper presents potential design and testing considerations for improving the reliability of water handling technologies for exploration spacecraft. Our application of interest is to devise a spacecraft wastewater management system wherein fouling can …