Path (un)predictability of two interacting cracks in polycarbonate sheets using Digital Image Correlation
Name
Path (unpredictability).pdf
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1.25 MB
Format
Adobe PDF
Checksum (MD5)
7a732ebb0fd1d35bece278f597acf69a
Author(s)
Koivisto, J.
Alava, M. J.
Santucci, S.
Dalbe, Marie Julie Elise
Date Issued
August 2016
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Koivisto, J. et al. “Path (Un)predictability of Two Interacting Cracks in Polycarbonate Sheets Using Digital Image Correlation.” Scientific Reports 6 (2016): 32278.
Version
Final published version
Abstract
Crack propagation is tracked here with Digital Image Correlation analysis in the test case of two cracks propagating in opposite directions in polycarbonate, a material with high ductility and a large Fracture Process Zone (FPZ). Depending on the initial distances between the two crack tips, one may observe different complex crack paths with in particular a regime where the two cracks repel each other prior to being attracted. We show by strain field analysis how this can be understood according to the principle of local symmetry: the propagation is to the direction where the local shear - mode K[subscript II] in fracture mechanics language - is zero. Thus the interactions exhibited by the cracks arise from symmetry, from the initial geometry, and from the material properties which induce the FPZ. This complexity makes any long-range prediction of the path(s) impossible.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/srep32278
