Journal
PHYSICAL REVIEW LETTERS
Volume 88, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.88.075509
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We present experimental evidence of self-healing shear cracks at a gel/glass interface. This system exhibits two dynamical regimes depending on the driving velocity: steady sliding at high velocity (>V-c similar or equal to 100-125 mum/s), characterized by a shear-thinning rheology, and periodic stick-slip dynamics at low velocity. In this last regime, slip occurs by propagation of pulses that restick via a healing instability occurring when the local sliding velocity reaches the macroscopic transition velocity V-c. At driving velocities close below V-c, the system exhibits complex spatiotemporal behavior.
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