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Abstract: The two-dimensional oscillatory crack instability, experimentally observed in a class of brittle materials under strongly dynamic conditions, has been recently reproduced by a nonlinear phase-field fracture theory. Here we highlight the universal character of this instability by showing that it is present in materials exhibiting widely different near crack tip elastic nonlinearity, and by demonstrating that the oscillations wavelength follows a universal master curve in terms of dissipation-related and nonlinear elastic intrinsic length scales. Moreover, we show that upon increasing the driving force for fracture, a high-velocity tip-splitting instability emerges, as experimentally demonstrated. The analysis culminates in a comprehensive stability phase-diagram of two-dimensional brittle fracture, whose salient properties and topology are independent of the form of near tip nonlinearity.
Comments: CH00001814 Credit 'Reindeer Business Holder Silhouette' Azeeda Card Card Wallet 5 pages, 4 figures, Supplemental Material
Subjects: Soft Condensed Matter (cond-mat.soft); Materials Science (cond-mat.mtrl-sci); Pattern Formation and Solitons (nlin.PS)
Cite as: arXiv:1807.07329 [cond-mat.soft]
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Submission history

From: Eran Bouchbinder [ view emailShoulder Envelope Purse Clutch Laser Fashion Bag Pink Womens Meliya Leather Holographic Handbag a0Xwvq]
[v1] Thu, 19 Jul 2018 10:17:44 GMT (1816kb,D)
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