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Unexpected Solidlike Fracture in Simple Liquids
11–20 of 68 posts
Re: Unexpected Solidlike Fracture in Simple Liquids
#12Turns out glass has been known to be a fluid and to fracture for quite some time.
[edit: but glass is not a simple fluid.]
Re: Unexpected Solidlike Fracture in Simple Liquids
#13Someone tell me the industries that are going to benefit the most from this in the short and long term and what I can expect to see in the next 30 years as a result of this discovery.
It’s a new, generalizable material-science property at STP. Those almost always find practical uses.
(Off the top of my head, a material that dissipates tension below a certain rate but fails when it is applied faster than that rate seems to resemble a mechanical breaker. As in not an electrical breaker that works mechanically. But one that decouples when you pull on it super hard. Being able to do that in fluids means one can potentially do that at very tiny scales.
More broadly, if simple fluids have a quasi-elastic mode, that has fundamental implications for hydrodynamics. I'd be super curious to know, for example, if anything similar to this occurs in air or water.)
Re: Unexpected Solidlike Fracture in Simple Liquids
#14Re: Unexpected Solidlike Fracture in Simple Liquids
#15Turns out glass has been known to be a fluid and to fracture for quite some time. [edit: but glass is not a simple fluid.]
I thought glass was a solid?
Re: Unexpected Solidlike Fracture in Simple Liquids
#16Re: Unexpected Solidlike Fracture in Simple Liquids
#17This seems more of inertia, Newton's first law. "An object at rest stays at rest,...". What comes to mind say there is some threshold acceleration (e.g. or at extreme, accelerate to c within some short time, t), then essentially you have a body at rest and breaks at the weakest point. Interesting would be seeing this effect with varying viscosity.
Re: Unexpected Solidlike Fracture in Simple Liquids
#18Earlier quoted context omitted.
I thought glass was a solid?
Nope, lots of fluids that just flow over such a long period they appear solid.
That’s a misconception. Glass does not flow over time; it is a rigid, amorphous solid.
The uneven thickness seen in old cathedral windows is a result of historical manufacturing. Glass was spun into discs that naturally became thicker at the edges, and builders installed the heavier side at the bottom for stability. Physicists calculate that it would take longer than the age of the universe for room-temperature window glass to visibly deform under gravity.
Reference: Zanotto, E. D. (1998). "Do cathedral glasses flow?" American Journal of Physics, https://doi.org/10.1119/1.19026
Re: Unexpected Solidlike Fracture in Simple Liquids
#19Re: Unexpected Solidlike Fracture in Simple Liquids
#20Turns out glass has been known to be a fluid and to fracture for quite some time. [edit: but glass is not a simple fluid.]
I thought glass was a solid?
It's an amorphous solid last time I dove into this.
The "well it's technically a liquid!" because it "flows" is really not telling the whole story. Like most science, it's just more complex than can be quickly summarized with one sentence, and doesn't quite map to just high school simplifications.