Abstract
We have developed a novel specimen for studying crack paths in glass. Under certain conditions, the specimen reaches a state where the crack must select between multiple paths satisfying the K II = 0 condition. This path selection is a simple but challenging benchmark case for both analytical and numerical methods of predicting crack propagation. We document the development of the specimen, using an uncracked and instrumented test case to study the effect of adhesive choice and validate the accuracy of both a simple beam theory model and a finite element model. In addition, we present preliminary fracture test results and provide a comparison to the path predicted by two numerical methods (mesh restructuring and XFEM). The directional stability of the crack path and differences in kink angle predicted by various crack kinking criteria is analyzed with a finite element model.
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Acknowledgements
The authors thank Garth Rohr and Corey Gibson for assistance with experiments, John Laing for valuable strain gage discussions, and John Emery for assistance with FRANC3D crack propagation calculations. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DENA0003525.
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Grutzik, S., Reedy, E. Crack Path Selection in Thermally Loaded Borosilicate/Steel Bibeam Specimen. Exp Mech 58, 1–10 (2018). https://doi.org/10.1007/s11340-017-0297-8
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DOI: https://doi.org/10.1007/s11340-017-0297-8