Saving notes. This paper calls what I’m looking for: “onset of sliding of extended interfaces”. It’s also referring to it as: “dynamic propagation of micro-slip fronts along the interface”.
“As a practical example, one can consider how macroscale models were progressively improved to reproduce some aspects of the experimental results reported by the group of Fineberg about the onset of sliding of extended interfaces [446,455,466-469]. Their main observation is that the transition from static to kinetic friction is mediated by the dynamic propagation of micro-slip fronts along the interface: ahead of the front, the interface is still in its stuck state, while it is already slipping behind it. Macroscopic sliding only occurs when the front has spanned the whole interface .”
READ IT:  Rubinstein S, Cohen G, Fineberg J. Dynamics of precursors to frictional sliding. Phys Rev Lett
READ IT:  Ben-David O, Rubinstein SM, Fineberg J. Slip-stick and the evolution of frictional strength.
DID NOT READ:  Ben-David O, Cohen G, Fineberg J. The Dynamics of the Onset of Frictional Slip. Science
DID NOT READ:  Svetlizky I, Fineberg J. Classical shear cracks drive the onset of dry frictional motion. Nature
READ IT:  Svetlizky I, Pino Muñoz D, Radiguet M, Kammer DS, Molinari J, Fineberg J. Properties of the
shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip.
Proceedings of the National Academy of Sciences 2016;113:542-7.
READ IT:  Rubinstein SM, Cohen G, Fineberg J. Detachment fronts and the onset of dynamic friction.
iN “Properties of the shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip” https://www.pnas.org/content/113/3/542
they induce a SEED CRACK
“Once the seed crack has reached a critical distance (Griffith length), lc, rupture acceleration commences”
I don’t know what “Griffith length” is. That’s new. I’m looking for the equivalent of seed cracks that form spontaneously – or rather, have unexpected causes. But, maybe “griffith length” will bear fruit.
Ok. Caught up. Confirmed that waves of three different speeds must travel across the interface FIRST before the stick-slip process starts.