stick-slip – into territory I know better. Musical instruments. I had to explore atomic level then earthquake level to see if I was missing anything — and I was. Earthquake level proved that yes, the tiny advance wave that starts the whole thing is still a mystery. Not what I wanted to hear but at least I’m not nuts. Now to violin strings and what is the optimum structure for maximum stick-slip. Usually stick-slip is a bad thing that needs to be minimized / dampened (it breaks things) but in certain applications it’s a good thing. It’s a human pulling a bow and not self-initiated but what’s self-initiated anyway? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5302002/

stick-slip – into territory I know better. Musical instruments. I had to explore atomic level then earthquake level to see if I was missing anything — and I was. Earthquake level proved that yes, the tiny advance wave that starts the whole thing is still a mystery. Not what I wanted to hear but at least I’m not nuts.
 
Now to violin strings and what is the optimum structure for maximum stick-slip. Usually stick-slip is a bad thing that needs to be minimized / dampened (it breaks things) but in certain applications it’s a good thing.
 
It’s a human pulling a bow and not self-initiated but what’s self-initiated anyway?
 
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5302002/
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ah, now THIS is a different set of parameters than earthquakes or atomic force spectrometry or hopf bifucation.
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Funny thing is, I know enough now about stick-slip that I could make a self-bowing violin using an earthworm style bow. Physics is physics.
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 But what amazes me is that the same physical process that violinists master is also what makes earthquakes tremble and allows us to see atoms.
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Johannes Aichele’s 2019 PhD paper
“Elastic waves in complex conditions: From
the onset of rupture to viscous dispersion
in foams”, had all the keywords I was looking for:
 
“Acoustic radiation” stick-slip slow-wave
 
I’d just learned about “Acoustic Radiation” from TRIZ Effects database when searching how to SEPARATE a FIELD
and “Surface Acoustic Wave” came up, which looked a LOT like the “slow wave” that proceeds disaster with a stick-slip event – or a violin playing.
 
Hoping it covers the “onset of rupture” portion as that’s what my main concern is: prior to oscillation part.
 
https://www.researchgate.net/profile/Johannes_Aichele/publication/339390951_Elastic_waves_in_complex_conditions_from_the_onset_of_rupture_to_viscous_dispersion_in_foams/links/5e5cfd774585152ce8ff9a60/Elastic-waves-in-complex-conditions-from-the-onset-of-rupture-to-viscous-dispersion-in-foams.pdf
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