Analysis of dynamic mixed-mode isochromatics |
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| Authors: | M Ramulu A S Kobayashi D B Barker |
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| Institution: | (1) Department of Mechanical Engineering, FU-10, University of Washington, 98195 Seattle, WA;(2) Department of Mechanical Engineering, University of Maryland, 20742 College Park, MD |
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| Abstract: | The mixed-mode, elastodynamic state of stress in the neighborhood of a constant-velocity crack tip is used to generate numerically
unsymmetric isochromatics. Unsymmetry associated with the third-order terms of a mixed-mode stress field, with and without
the Mode II singular stress term, is also investigated. In extractingK
I
from an unsymmetric isochromatic pattern, errors in the Mode I fracture parameters due to the assumed presence ofK
II
in aK
I
stress field were found to be significant when data are taken more than 4 mm from the crack tip.
Paper was presented at V International Congress on Experimental Mechanics held in Montreal, Quebec, Canada on June 10–15,
1984. |
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