Search Results - "Bahr, David F."

Multi-Scale Analyses and Modeling of Metallic Nano-Layers by Moleinia, Zara, Bahr, David F

“…The current work centers on multi-scale approaches to simulate and predict metallic nano-layers' thermomechanical responses in crystal plasticity large…”
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Effects of Cellulose Nanowhiskers on Mechanical, Dielectric, and Rheological Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Cellulose Nanowhisker Composites by Ten, Elena, Bahr, David F, Li, Bin, Jiang, Long, Wolcott, Michael P

“…The thermal, mechanical, dielectric, and dynamic mechanical properties of polymer nanocomposites strongly depend on nanoparticles’ content and aspect ratio. In…”
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The mechanical properties of as-grown noncubic organic molecular crystals assessed by nanoindentation by Taw, Matthew R., Yeager, John D., Hooks, Daniel E., Carvajal, Teresa M., Bahr, David F.

“…Organic molecular crystals are often noncubic and contain significant steric hindrance within their structure to resist dislocation motion. Plastic deformation…”
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Relative molecular orientation can impact the onset of plasticity in molecular crystals by Grennan, Hugh P, Burch, Alexandra C, Bahr, David F

“…Abstract Creating or moving dislocations is the first step to dissipating mechanical energy via plastic deformation under contact loading. In molecular…”
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Electroless Deposition for Robust and Uniform Copper Nanoparticles on Electrospun Polyacrylonitrile (PAN) Microfiltration Membranes by Aminu, Temitope Q, Juybari, Hamid Fattahi, Warsinger, David M, Bahr, David F

“…Filtration membranes coated in metals such as copper have dramatically improved biofouling resistance and pathogen destruction. However, existing coating…”
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Nanomechanical testing technique for millimeter-sized and smaller molecular crystals by Maughan, Michael R, Carvajal, M Teresa, Bahr, David F

“…Large crystals are used as a control for the development of a mounting and nanoindentation testing technique for millimeter-sized and smaller molecular…”
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A stochastic crystal plasticity framework for deformation of micro-scale polycrystalline materials by Askari, Hesam, Maughan, Michael R., Abdolrahim, Niaz, Sagapuram, Dinakar, Bahr, David F., Zbib, Hussein M.

“…•Using numerical and experimental data, we identified the source of uncertainty in the mechanical properties.•Dislocation scarcity, grain size distribution and…”
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Effect of accelerated aging on dental zirconia-based materials by De Souza, Grace M., Zykus, Angelica, Ghahnavyeh, Reza R., Lawrence, Samantha K., Bahr, David F.

“…To investigate the effect of aging on phase transformation and mechanical properties of yttria-tetragonal zirconia polycrystal (Y-TZP). Fully-sintered Y-TZP…”
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Additive manufacturing of a high-performance aluminum alloy from cold mechanically derived non-spherical powder by Martin, J. Hunter, Barnes, John E., Rogers, Kirk A., Hundley, Jacob, LaPlant, Darby L., Ghanbari, Siavash, Tsai, Jung-Ting, Bahr, David F.

“…Metal additive manufacturing provides a path to optimized component design with significant realized advantages in the medical and aerospace industries…”
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Effect of ionizing radiation and chewing simulation on human enamel and zirconia by Hajhamid, Beshr, Mohammad Rahimi, Raheleh, F Bahr, David, M De Souza, Grace

“…To evaluate the effect of ionizing irradiation on human enamel and zirconia after chewing simulation. Twenty enamel and twenty translucent Yttria-stabilized…”
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Direct observation of plasticity and quantitative hardness measurements in single crystal cyclotrimethylene trinitramine by nanoindentation by Ramos, Kyle J., Hooks, Daniel E., Bahr, David F.

“…Investigation of deformation beginning with elasticity and continuing through the elastic-plastic transition to incipient cracking has been conducted for…”
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Characterization of flexible ECoG electrode arrays for chronic recording in awake rats by Yeager, John D., Phillips, Derrick J., Rector, David M., Bahr, David F.

“…We developed a 64-channel flexible polyimide ECoG electrode array and characterized its performance for long-term implantation, chronic cortical recording and…”
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Grain Boundary Contributions to Hydrogen-Affected Plasticity in Ni-201 by Lawrence, Samantha K., Somerday, Brian P., Moody, Neville R., Bahr, David F.

“…Hydrogen embrittlement of structural materials, such as nickel-based alloys, is often characterized by enhanced dislocation processes as well as grain boundary…”
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Well-Adhered Copper Nanocubes on Electrospun Polymeric Fibers by Aminu, Temitope Q., Brockway, Molly C., Skinner, Jack L., Bahr, David F.

“…Electrospun polymer fibers can be used as templates for the stabilization of metallic nanostructures, but metallic species and polymer macromolecules generally…”
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Nanoindentation of HMX and Idoxuridine to Determine Mechanical Similarity by Burch, Alexandra, Yeager, John, Bahr, David

“…Assessing the mechanical behavior (elastic properties, plastic properties, and fracture phenomena) of molecular crystals is often complicated by the difficulty…”
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The mechanical response of core-shell structures for nanoporous metallic materials by Abdolrahim, Niaz, Bahr, David F., Revard, Benjamin, Reilly, Cassandra, Ye, Jia, Balk, T. John, Zbib, Hussein M.

“…Nanoporous gold (NP-Au) exhibits microscale plasticity, but macroscopically fails in a relatively brittle manner. This current study suggests that a core-shell…”
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Microstructural characterization of thin gold films on a polyimide substrate by Yeager, John D., Bahr, David F.

“…The study of thin metal films on flexible substrates is of interest for manufacture of many devices, such as implantable electrode arrays consisting of gold…”
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An energy-based nanoindentation method to assess localized residual stresses and mechanical properties on shot-peened materials by Ghanbari, Siavash, Bahr, David F.

“…Concurrently assessing localized residual stresses and mechanical properties in cases where there are gradients in stresses and properties (such as those…”
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Flow-induced bending deformation of electrospun polymeric filtration membranes using the “leaky” bulge test by Aminu, Temitope Q., Bahr, David F.

“…In service, hydraulic flow is usually perpendicular to the plane of electrospun fiber mats for water filtration, inducing an out-of-plane deformation. In this…”
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Critical Issues in MEMS Property Measurement and Variation Measured by Nanoindentation: Error Sources and Uncertainty by Maughan, Michael R., Bahr, David F.

“…A methodology has been developed for determining the uncertainty in the mechanical properties of metallic films, often used in suspended geometries in MEMS…”
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