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There are a total of 8 record(s) matching your query.
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Equations For Selected Fracture-Mechanics Parameters
Author(s): Bubsey, Raymond T.; Orange, Thomas W.; Pierce, William S.; Shannon, John L., Jr.
Abstract: Equations describing crack-mouth-opening displacements, stress-intensity factors, and related fracture-mechanics parameters of chevron-notched short bar and rod specimens presented in report. Equations in forms suitable for ...
NASA Center: Glenn Research Center
Publication Year: 1994
Added to NTRS: 2005-09-30
Accession Number: 94B10708; Document ID: 19940000708; Report Number: LEW-15865
The effect of texture on the crack growth resistance of alumina
Author(s): Salem, Jonathan A.; Shannon, John L., Jr.; Bradt, Richard C.
Abstract: The crack growth resistance of a textured, extruded alumina body was compared with that of an isotropic, isopressed body of similar grain size, density, and chemistry. R-curve levels reflected the preferred orientation; ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-08-25
Accession Number: 88N14206; Document ID: 19880004824; Report Number: E-3873, NAS 1.15:100250, NASA-TM-100250, REPT-167-B-87
Analysis of some compliance calibration data for chevron-notch bar and rod specimens
Author(s): Orange, Thomas W.; Bubsey, Raymond T.; Pierce, William S.; Shannon, John L., Jr.
Abstract: A set of equations describing certain fracture mechanics parameters for chevron-notch bar and rod specimens are presented. They are developed by fitting earlier compliance calibration data. The difficulty in determining the ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 91N22594; Document ID: 19910013281; Report Number: E-6167, NAS 1.15:104367, NASA-TM-104367
Fracture toughness of Si3N4 measured with short bar chevron-notched specimens
Author(s): Salem, Jonathan A.; Shannon, John L., Jr.
Abstract: The short bar chevron-notched specimen is used to measure the plane strain fracture toughness of hot pressed Si3N4. Specimen proportions and chevron-notch angle are varied, thereby varying the amount of crack extension to ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 87A30621; Document ID: 19870043347
Fracture mechanics
Author(s): Shannon, John L., Jr.
Abstract: The application of fracture mechanics to the design of ceramic structures will require the precise measurement of crack growth and fracture resistance of these materials over their entire range of anticipated service ...
NASA Center: Glenn Research Center
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 88N23877; Document ID: 19880014493
Revision of Standard Method of Test for Plane Strain Fracture Toughness
Author(s): Shannon, John L., Jr.
Abstract: The purpose of this grant is to revise ASTM Standard Method of Test E-399 for Plane Strain Fracture Toughness of Metallic Materials based on users' experience, and to harmonize the Method with international standards in the ...
NASA Center: Glenn Research Center
Publication Year: 1998
Added to NTRS: 2004-11-03
Document ID: 19990113171
Effects of precracking methods on the fracture properties of alumina
Author(s): Salem, Jonathan A.; Shannon, John L., Jr.; Jenkins, Michael G.; Ferber, Mattison K.
Abstract: Fracture toughness values were compared for quasi-statically cracked, rapidly precracked, and fatigue precracked specimens of the same 96 percent alumina. The quasi-statically cracked specimens exhibited a rising R-curve and ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 93A16645; Document ID: 19930032648
Crack growth resistance of textured alumina
Author(s): Salem, Jonathan A.; Shannon, John L., Jr.; Bradt, Richard C.
Abstract: The crack growth resistance of a textured, extruded alumina body was compared with that of anisotropic, isopressed body of similar grain size, density, and chemistry. R-curve levels reflected the preferred orientation; ...
NASA Center: Glenn Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 89A26452; Document ID: 19890039081
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