Search Results - "Quinn, D G"

Indentation brittleness of ceramics : a fresh approach by QUINN, J. B, QUINN, G. D

“…The hardness and brittleness of ceramic materials are interrelated. Hard materials are more apt to fracture in the vicinity of an indentation during a hardness…”
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On edge chipping testing and some personal perspectives on the state of the art of mechanical testing by Quinn, G.D

“…Highlights • Edge chipping tests with simple rectangular test blocks evaluate a materials resistance to chipping. • Materials may be ranked for their chipping…”
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Chipping fracture resistance of dental CAD/CAM restorative materials: Part I – Procedures and results by Quinn, G.D, Giuseppetti, A.A, Hoffman, K.H

“…Abstract Objective The edge chipping test was used to measure the fracture resistance of CAD/CAM dental restoration ceramics and resin composites. Methods An…”
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Investigation into the Mechanical Cause of Failure of Neutron Guide NG-2 at the NIST Research Reactor by ZILCHA, O, QUINN, G. D, ROWE, J. M, PIERCE, D. J

“…This study investigates the fractures that occurred in a glass structure used to carry neutrons from a cold source in the NIST reactor into an experimental…”
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ON THE NATURE OF MACHINING CRACKS IN GROUND CERAMICS: PART I: SRBSN STRENGTHS AND FRACTOGRAPHIC ANALYSIS by Quinn, G. D., Ives, L. K., Jahanmir, S.

“…Machining cracks in ground sintered reaction-bonded silicon nitride (SRBSN) rods and bars were analyzed by fractographic techniques. Grinding flaw sizes were…”
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Chipping fracture resistance of dental CAD/CAM restorative materials: Part 2. Phenomenological model and the effect of indenter type by Quinn, G.D, Giuseppetti, A.A, Hoffman, K.H

“…Abstract The edge chipping resistances of six CAD/CAM dental restoration materials are analyzed and correlated to other mechanical properties. A new quadratic…”
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Chipping fracture resistance of denture tooth materials by Quinn, G.D, Giuseppetti, A.A, Hoffman, K.H

“…Abstract Objective The applicability of the edge chipping method to denture tooth materials was assessed. These are softer materials than those usually tested…”
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Dynamic Compression Strength of Ceramics: What was Learned from an Interlaboratory Round Robin Exercise? by Swab, J. J., Chen, W., Hogan, J., Liao, H., Lo, C., Mates, S., Meredith, C., Pittari, J. J., Rhorer, R., Quinn, G. D.

“…The dynamic compressive strength of a commercial alumina was determined by five participants using the Split-Hopkinson pressure bar (SHPB) method with a…”
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Fracture toughness ( KIc) of a dental porcelain determined by fractographic analysis by Scherrer, S.S., Robert Kelly, J., Quinn, G.D., Xu, K.

“…Objectives: Fractographic analysis of indentation cracks is performed following flexure testing as part of the ASTM (1999) standard for fracture toughness, K…”
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Dugbe virus ovarian tumour domain interferes with ubiquitin/ISG15-regulated innate immune cell signalling by Bakshi, S, Holzer, B, Bridgen, A, McMullan, G, Quinn, D G, Baron, M D

“…The ovarian tumour (OTU) domain of the nairovirus L protein has been shown to remove ubiquitin and interferon-stimulated gene 15 protein (ISG15) from host cell…”
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Bridging stresses in sintered reaction-bonded Si3N4 from COD measurements by Fett, T, Munz, D, Kounga Njiwa, A B, Rodel, J, Quinn, G D

“…Crack opening displacement (COD) measurements on a sintered reaction-bonded Si3N4 ceramic obtained in bending tests with edge-V-notched specimens were…”
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An inset CT specimen for evaluating fracture in small samples of material by Yahyazadehfar, M., Nazari, A., Kruzic, J.J., Quinn, G.D., Arola, D.

“…In evaluations on the fracture behavior of hard tissues and many biomaterials, the volume of material available to study is not always sufficient to apply a…”
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Fatigue of zirconia and dental bridge geometry: Design implications by Quinn, G.D, Studart, A.R, Hebert, C, VerHoef, J.R, Arola, D

“…Abstract Zirconia is currently used as a framework material for posterior all-ceramic bridges. While the majority of research efforts have focused on the…”
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ON THE NATURE OF MACHINING CRACKS IN GROUND CERAMICS: PART II, COMPARISON TO OTHER SILICON NITRIDES AND DAMAGE MAPS by Quinn, G. D., Ives, L. K., Jahanmir, S.

“…The size and severity of grinding machining cracks in a sintered reaction bonded silicon nitride are compared to data for other silicon nitrides. Crack sizes…”
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Weibull Strength Scaling for Standardized Rectangular Flexure Specimens by Quinn, George D.

“…Formulas for the effective volumes and effective surfaces for rectangular bars loaded in flexure are reviewed. The ratio of strengths from any two…”
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Effect of Precrack "Halos" on Fracture Toughness Determined by the Surface Crack in Flexure Method by Swab, Jeffrey J., Quinn, George D.

“…The surface crack in flexure method, which is used to determine the fracture toughness of dense ceramics, necessitates the measurement of precrack sizes by…”
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Anomalous Defects and Dynamic Failure of Armor Ceramics by Bakas, M.P., Greenhut, V.A., Niesz, D.E., Quinn, G. D., McCauley, J. W., Wereszczak, A. A., Swab, J. J.

“…The ballistic performance of state‐of‐the‐art silicon carbide armor material can exhibit a fairly wide variability in certain test configurations, which, it is…”
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Fracture Toughness of Veneering Ceramics for Fused to Metal (PFM) and Zirconia Dental Restorative Materials by Quinn, Janet B, Quinn, George D, Sundar, Veeraraghaven

“…Veneering ceramics designed to be used with modern zirconia framework restorations have been reported to fracture occasionally in vivo. The fracture toughness…”
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Fracture toughness of advanced ceramics at room temperature by Quinn, George D., Salem, Jonathan, Bar-On, Isa, Cho, Kyu, Foley, Michael, Fang, HO

“…Results of round-robin fracture toughness tests on advanced ceramics are reported. A gas-pressure silicon nitride and a zirconia-toughened alumina were tested…”
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Weibull Effective Volumes and Surfaces for Cylindrical Rods Loaded in Flexure by Quinn, George D.

“…Formulas are given for the effective volumes and effective surfaces for cylindrical rods that have been loaded in flexure. Strength scaling for specimen size…”
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