TY - JOUR
T1 - Crack front dynamics
T2 - The interplay of singular geometry and crack instabilities
AU - Kolvin, Itamar
AU - Cohen, Gil
AU - Fineberg, Jay
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - When fast cracks become unstable to microscopic branching (microbranching), fracture no longer occurs in an effective 2D medium. We follow in-plane crack front dynamics via real-time measurements in brittle gels as microbranching unfolds and progresses. We first show that spatially local energy balance quantitatively describes crack dynamics, even when translational invariance is badly broken. Furthermore, our results explain microbranch dynamics; why microbranches form along spatially localized chains and how finite-time formation of cusps along the crack front leads to their death.
AB - When fast cracks become unstable to microscopic branching (microbranching), fracture no longer occurs in an effective 2D medium. We follow in-plane crack front dynamics via real-time measurements in brittle gels as microbranching unfolds and progresses. We first show that spatially local energy balance quantitatively describes crack dynamics, even when translational invariance is badly broken. Furthermore, our results explain microbranch dynamics; why microbranches form along spatially localized chains and how finite-time formation of cusps along the crack front leads to their death.
UR - http://www.scopus.com/inward/record.url?scp=84930221588&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.114.175501
DO - 10.1103/PhysRevLett.114.175501
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AN - SCOPUS:84930221588
SN - 0031-9007
VL - 114
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
M1 - 175501
ER -