Abstract
When a tensile stress is applied to a thin cracked plate, a strip necking region results ahead of a crack tip. The relative opening displacement between the crack surfaces and between the upper and lower boundaries of the strip necking region were measured by the moiré method. The strains ahead of the strip necking region and the thickness reduction (therein) were also measured. The measured relative opening displacements were compared with the calculated values using the Dugdale strip necking model. The thickness reduction in the strip necking region is equal to the relative opening displacement.
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This report was produced under contracts sponsored by AISI and NASA. The conclusions and recommendations expressed are those of the authors and are not necessarily endorsed by the sponsor.
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Schaeffer, B.J., Liu, H.W. & Ke, J.S. Deformation and the strip necking zone in a cracked steel sheet. Experimental Mechanics 11, 172–175 (1971). https://doi.org/10.1007/BF02324909
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DOI: https://doi.org/10.1007/BF02324909