SEDL / STP / STP945-EB / STP23291S

Calibration of a Mode II Test Specimen

Buzzard, RJ
Materials engineer and aerospace engineer, National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH

Gross, B
Materials engineer and aerospace engineer, National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH

Pages: 6    Published: Jan 1988

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Abstract

Mode II and Mode I calibrations of the NASA Lewis Research Center Mode II fatigue specimen were performed experimentally over crack length to specimen width ratios (a/W) of 0.5 to 0.9. Mode II displacements were measured both at the specimen notch mouth and at the intersection of the notch with the centerline of the loading pin holes. Mode I displacements were measured across the span of the specimen at the loading pins' centerline. Analytical stress intensity factor coefficients for both Mode II and Mode I are also presented.