3 point bending nanodiamond test
3 point bending nanodiamond test
(OP)
I have a question regarding the compressibility of a nanodiamond. It is regarding the steric accuracy of a diamond probe surface.
Assuming a block of singly nucleated nanodiamond 100 X 100 X 100 nm. Assuming a section *magically* cut out of the middle measuring 75 X 75 X 1 nm. The goal is to press the sides of the diamond block and have the cutout inner surface faces touch. My question is, would the diamond fracture before the opposing cutout surfaces touched?
I think this is basically a three point bending test of a very small chunk of diamond measuring 75 X 75 X 49.5 nm. Could the diamond be bent 4 or 5 angstroms along its 49.5 nm thickness before fracturing? I'm sure there is an equation to plug in numbers, but I don't yet know what it is. Thx.
Assuming a block of singly nucleated nanodiamond 100 X 100 X 100 nm. Assuming a section *magically* cut out of the middle measuring 75 X 75 X 1 nm. The goal is to press the sides of the diamond block and have the cutout inner surface faces touch. My question is, would the diamond fracture before the opposing cutout surfaces touched?
I think this is basically a three point bending test of a very small chunk of diamond measuring 75 X 75 X 49.5 nm. Could the diamond be bent 4 or 5 angstroms along its 49.5 nm thickness before fracturing? I'm sure there is an equation to plug in numbers, but I don't yet know what it is. Thx.





RE: 3 point bending nanodiamond test
(FEA would be handy as this is a simple geometry.)
That said mechanics was my worst area of materials. I could build an FEA model to do this but couldnt check it. (IE: I forgot how to do manual mechanics.)
RE: 3 point bending nanodiamond test
A simple strength calculation could be done, but really this is a fracture mechanics question. To determine the behavior, you would need elastic modulus, Poisson's ratio, and the fracture toughness of diamond.
Regards,
Cory
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RE: 3 point bending nanodiamond test
RE: 3 point bending nanodiamond test
Not sure if the standard values are valid for this thin a plate, though...
TTFN