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Showing 1 to 20 of 72 for “"surface damage"”.

  1. Surface damage through grazing incidence ions investigated by scanning tunneling microscopy

    Redinger, AlexPublikationsserver der RWTH Aachen University2009

    Surface damage, caused by grazing incidence ions, is investigated with variable temperature scanning tunneling microscopy. The experiments are carried out on a Pt(111) crystal. The kinetic energy of noble gas ions is varied between 1-15 keV and the angle of incidence can be adjusted between 78.5° …

    aachen Repository record

  2. Theoretical analysis and experimental investigation of contact fatigue and surface damage in prealloyed and diffusion bonded sintered steels

    Mekonone, Samuel TesfayeUniversità degli studi di Trento2018

    The contact fatigue and surface damage of prealloyed (Fe-0.85Mo, Fe-1.5Mo) and diffusion bonded (Ni-free, low-Ni, high-Ni) powder metallurgy (PM) steels were investigated. Materials subjected to contact stress fail due to the nucleation of subsurface cracks (contact fatigue cracks), nucleation of …

    trento Repository record

  3. Auditory Evoked Response Threshold Shifts and Surface Damage to the Organ of Corti in the Chinchilla Resulting From Moderate Intensity, Long Duration Noise Exposures

    Mcdowell, Kenneth Paul, Jr.University of Illinois at Urbana-Champaign2015

    Made available in DSpace on 2015-05-14T15:08:29Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7709094.PDF: 10598814 bytes, checksum: afa81daf3c0ec88f72033a454262a081 (MD5) Previous issue date: 1976

    uiuc Repository record

  4. Microstructural Analysis and Assessment of the Anterior Ocular Surface Damage Caused by Ultraviolet Light from Natural and Artificial Sources // Възможности за микроструктурен анализ и оценка на уврежданията на предната очна повърхност от ултравиолетови лъчи с естествен и изкуствен произход

    Радева, Младена, Radeva, MladenaMedical University of Varna2021

    Трудът оценява и описва микроструктурните промени на очната повърхност, получени в отговор на излагане на УВ светлина от естествен и изкуствен източник. Резултатите са съпоставени със слънцезащитните навици като се проследява тяхната динамика, използвайки in vivo конфокална микроскопия. За период …

    varna Repository record

  5. Modal analysis of laser vibrated structures

    Philp, Wayne ReginaldVictoria University of Technology1993

    … high-power laser pulses ablate the irradiated surface material and may impulsively excite structural vibration; however, the use of laser power densities above the ablation threshold causes significant surface damage. This work extends current optical excitation techniques by demonstrating that …

    vu-aus Repository record

  6. Noncontact sensing systems and autonomous decision-making for early-age concrete

    Tran, Quang Ngoc VinhUniversity of Illinois at Urbana-Champaign2020

    … (LR-wave) wave signals over time and space (surface of the concrete). The non-contact UTS integrates a 50 kHz non-contact ultrasonic transmitter and an array of five microelectromechanical systems (MEMS) sensors as non-contact receivers. The UTS technique was first implemented in the …

    uiuc Repository record

  7. The Fracture Strength of Ceramic Brackets : A Comparative Study

    Flores, Daniel A.

    … study was to determine the effect of different surface conditions and different ligation methods on the fracture strength of ceramic brackets and the yield strength of metal brackets.</p> <p>Ceramic brackets followed the Griffith model, which was used to interpret their fracture strength with …

    loma-linda Repository record

  8. Fabrication and Transport Properties of Silicon Nanoelectronic Devices

    Robinson, Stephen JohnUniversity of Illinois at Urbana-Champaign2015

    … they may be used to contact nanodevices, but surface damage may preclude that possibility.

    uiuc Repository record

  9. GENERATION, MECHANICAL AND STATISTICAL ANALYSIS, AND FEM SIMULATION OF FRACTURE OF REPEATABLE RANDOM ROUGH SURFACES

    Medina, Hector2017

    … materials in service nearly always generate surface roughness, and follow the Central Limit Theorem prediction for surface topology. This study couples experimental and statistical theory, and FEM to extend knowledge of life of materials from initial service surface conditions through surface …

    vcu Repository record

  10. Sensitivity analysis and simulations of surface heating for hypersonic cavity flows

    Rice, Nina2024

    … and discontinuities that affect the surface properties, and potentially results in surface damage. Simulations were performed using semi-structured 2D meshes in FUN3D with the Spalart-Allmaras and Menter Shear Stress Transport turbulence models at a freestream Mach number of 10. The …

    utc Repository record

  11. Development of an Experimental System to Generate and Characterize Supersonic Aerosol Particles Using Laser Doppler Velocimetry

    McGee, Devin2023

    … flight vehicle encounters with aerosols and the surface damage resulting from particle impacts during flight. To investigate and characterize the damage potential of aerosol particles at flight speeds, a bench-top system was developed. This system is characterized in this thesis in its ability to …

    umn Repository record

  12. Engineered Alumina / Silicon Carbide Laminated Composites

    De Genua, FrancescaUniversità degli studi di Trento2014

    … critical problems due to their lack of damage tolerance and to the limited mechanical reliability. Several ceramic composites and, in particular, laminated structures have been developed in recent years to enhance strength, toughness and to improve flaw tolerance. Significant strength …

    trento Repository record

  13. Effects of crack-crystallite interaction on the fracture behavior of a cordierite glass-ceramic

    Morena, Robert M.Virginia Polytechnic Institute and State University1982

    … finer-grained (< 0.1 µm) crystalline matrix. Surface damage was simulated by the Vicker's microhardness technique, with indentations being made over a wide load range to duplicate varying degrees of severity in the contact events. Direct measurement of the indentation flaws was made by …

    vt Repository record

  14. UAS Model Identification and Simulation to Support In-Flight Testing of Discrete Adaptive Fault-Tolerant Control Laws

    Bakori, Mansi Subhash

    … occurring failures such as partial control surface damage, pilot-induced oscillations, and uncertain ice accretion.</p>

    embry-riddle Repository record

  15. Sliding contact at plastically graded surfaces and applications to surface design

    Prasad, Anamika, 1979-Massachusetts Institute of Technology2007

    … is known to offer avenues for suppressing surface damage during normal indentation and sliding contact. These graded materials have potential applications in diverse areas such as barrier coatings for structural components and industrial tools. The gradient in plastic properties is of …

    mit Repository record

  16. Pathogenesis of Dry Eye in Graft Versus Host Disease (GVHD): Role of Ocular Mucins and Conjunctival Fibrosis

    Shamloo, Kiumars

    … immune cells to host organs, including the eye surface. Mostly based on the time of disease onset after transplantation, GVHD is divided into the acute and chronic phase. The eyes may be involved in both acute and chronic GVHD, although ocular involvement is more common in the chronic GVHD with …

    chapman Repository record

  17. Geotechnical characterization of coal refuse for use as a backfill material

    Bowman, Charles H.Virginia Tech1991

    … from underground coal mining have caused surface damage to land and structures. A method of subsidence mitigation successfully used abroad, and to a much lesser extent in U.S. coal mines, is backfilling. In addition to the possible benefits of subsidence mitigation, backfilling has the …

    vt Repository record

  18. Ensuring safety in soy: a review of chlorpyrifos detection and mitigation for consumer confidence

    Ziemann-Bolinske, Shaundra2025

    … safety thresholds. Cold plasma (CP) resulted in surface damage to the beans, rendering the process unacceptable, although faster to reach tolerance levels than O3. While washing and O3 treatments demonstrated moderate success, a combination of ULS and O3 treatments demonstrated synergistic …

    ksu Repository record

  19. Modeling Cumulative Damage to Flow Surfaces and Assessing its Impact on Wall Turbulence

    Licari, Anthony M.University of Illinois at Urbana-Champaign2011

    … effort investigated the influence of cumulative damage of an initially smooth surface on the statistical characteristics of wall turbulence. Singular value decomposition was employed to decompose a highly-irregular surface topography replicated from a turbine blade damaged by spallation into …

    uiuc Repository record

  20. Enabling the simulation of helium transport in lithium for fusion devices

    Heins, Mason PhilroyUniversity of Missouri--Columbia2024

    … tokamak. However, tungsten will still receive surface damagefrom hydrogen and helium ions. Using flowing lithium to shield the tungsten divertor may reduce the surface damage to the solid divertor. Lithium also has a positive effect on the confinement of the plasma. To more fully understand the …

    missouri Repository record

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