Abstract
The displacement fieldsu x ,u y at growing crack tip of LY12-M specimens with double edge cracks are measured using moire method. The experimental singularity fields are compared with GH theoretical field [12–14]. The size and shape of the experimental GH singularity fields are obtained. The error in both the experimental and theoretical evaluations is controlled within ±10%. The experiments show that there is\(\left( {\ln \frac{A}{r}} \right)^{\bar \alpha + 1}\) singularity dominant around a growing crack tip. The shape of this dominant region ranges from butterfly wing to oblate and circular. Inside GH-field, there is a 3-D deformed damage zone where no GH singularity exists.
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The project suppoted by National Natural Science Foundation of China
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Baochen, L., Shutian, L. Experimental GH singularity field around growing crack-tip. Acta Mech Sinica 7, 251–257 (1991). https://doi.org/10.1007/BF02487593
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DOI: https://doi.org/10.1007/BF02487593