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Effect of fracture surface interference on shear crack growth [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: (9 pages) : digital, PDF file
Additional Creators
University of New Hampshire, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A joint analytical-experiment program to investigate the effect of fracture surface interference on shear modes of crack growth is progressing satisfactorily. A general two-dimensional, boundary element model has been formulated by the group at Ohio State University that is capable of calculating the effective Mode I and Mode II stress intensity factors for flat or curved cracks with small scale yielding. The model can calculate K{sub I} and K{sub II} for an arbitrary constitutive law for displacement of the crack faces. The constitutive law proposed in our earlier work is being used in the new boundary element model. The experimental portion of the effort at UNH was to use an as-yet undeveloped electro-optic holographic interferometry (EOH) system to measure the crack face displacement field while the crack is loaded in shear. The algorithms for obtaining the interferograms have been developed, the testing machine modifications necessary for interferometric measurements are complete, and interferograms of specimens under load have been obtained. Techniques for digitizing the fracture surface profile have been developed and preliminary numerical experiments have been conducted to determine the ΔK dependence of fracture asperity interference on an actual crack.
Report Numbers
E 1.99:doe/er/45433-1
doe/er/45433-1
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Note
Published through SciTech Connect.
02/01/1992.
"doe/er/45433-1"
"DE92011431"
Gross, T.S.; Mendelsohn, D.A. . Dept. of Engineering; Watt, D.W. . Dept. of Mechanical Enginee.
Funding Information
FG02-90ER45433
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