Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Development Of A Biaxial Loading Frame For Thin Sheet Cruciform Specimens, Joseph Frederick Wilson
Development Of A Biaxial Loading Frame For Thin Sheet Cruciform Specimens, Joseph Frederick Wilson
Master's Theses and Capstones
Characterization of the evolving yield loci and forming limit diagrams for sheet materials under biaxial loading is necessary for the development of accurate sheet metal forming process simulations. Biaxial tension testing has been shown to have significant advantages over the current computational and experimental methods for such material characterization; however, the few commercially available loading frames are far too large and expensive to be practical for most metal forming research laboratories. To address this problem, the University of New Hampshire’s Mechanics, Materials, and Manufacturing Lab is working to design a practical servohydraulic biaxial loading frame for such metal forming laboratories. …
High-Frequency Broadband Seafloor Backscatter In A Sandy Estuarine Environment, Eric James Bajor
High-Frequency Broadband Seafloor Backscatter In A Sandy Estuarine Environment, Eric James Bajor
Master's Theses and Capstones
Seafloor backscatter collected with high-frequency (> 100 kHz) hydrographic echosounders has become an important aspect of seafloor characterization for benthic ecologists and other scientists. The mechanisms that control acoustic scattering at these high frequencies are not completely understood, although surficial roughness and the presence of discrete particles (e.g., shell hash) are likely contributors. To further our understanding of the impact these mechanisms have on seafloor scattering, broadband (100-250 kHz) acoustic measurements were taken at a grazing angle of 45° in a shallow-water, sandy environment with a known presence of shell hash. Stereo imagery was collected simultaneously to quantify the surficial …
Experimental Investigation Of Plastic Anisotropy Of Commercially-Pure Titanium, Madhav Baral
Experimental Investigation Of Plastic Anisotropy Of Commercially-Pure Titanium, Madhav Baral
Master's Theses and Capstones
The plastic anisotropy of Commercially-Pure Titanium (CP-Ti, or Grade 2 Ti) is probed with an extensive set of experiments, performed on a hot-rolled CP-Ti plate of 12.7 mm thickness. The experiments reported here are: 1) uniaxial tension at 15o angles to the rolling direction (RD) of the plate, 2) uniaxial tension in the thickness, or normal direction (ND) of the plate, 3) uniaxial compression at 15o angles to the RD, as well as in ND, 4) plane-strain tension at 15o angles to the RD, 5) plane-strain compression at 15o angles to the RD. A total of 30 experiments (and two …