Timeline for What is the stiffness of a crushed rod or cylinder?
Current License: CC BY-SA 3.0
18 events
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| Aug 18, 2019 at 20:04 | comment | added | John Alexiou | For reference, I found this article wherein Figure 2.10 describes this exact same problem. | |
| Mar 8, 2018 at 13:47 | history | edited | John Alexiou | CC BY-SA 3.0 |
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| Feb 10, 2017 at 0:21 | vote | accept | John Alexiou | ||
| S Feb 10, 2017 at 0:21 | history | bounty ended | John Alexiou | ||
| S Feb 10, 2017 at 0:21 | history | notice removed | John Alexiou | ||
| Feb 5, 2017 at 16:48 | comment | added | Muze | It really is a precise math and art when heating, moving and quenching metal that makes the strongest blade from a rod. All metals have different temperatures and properties, but normally its a mixture of steal and carbon to make the strongest blades. Heat,cooling time and the speed which it is crushed should be a factor. | |
| Feb 4, 2017 at 18:42 | comment | added | John Alexiou | But in a Hertzian sense the line contact has to have a width to spread the force making the contact pressure finite and the deflections calculatable. | |
| Feb 4, 2017 at 1:07 | comment | added | user93237 | The stresses near the two points of contact (or, rather, the two lines of contact) are of course going to be much higher than the stresses throughout the rest of the blue rod. So relatively early in the compression you're going to exceed the yield strength of the rod material in those localized regions, and once that happens there really isn't much hope of finding an analytical solution to the problem. (Unless the rod is made out of some material like jello or rubber which doesn't hit a yield point until fairly high strains.) | |
| Feb 4, 2017 at 0:57 | history | edited | John Alexiou | CC BY-SA 3.0 |
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| Feb 3, 2017 at 23:51 | history | tweeted | twitter.com/StackPhysics/status/827665951868989440 | ||
| Feb 3, 2017 at 20:26 | answer | added | nicoguaro | timeline score: 3 | |
| Feb 3, 2017 at 19:03 | comment | added | John Alexiou | We can assume a line contact and known force applied. The contact width can be assumed to be zero as a first pass. This is because I can get the contact stiffness between two parallel rods from Hertz. | |
| Feb 3, 2017 at 16:32 | comment | added | nicoguaro | One caveat about this problem is the nonlinearity that appears due to the contact (the boundary conditions are changing). | |
| S Feb 3, 2017 at 14:34 | history | bounty started | John Alexiou | ||
| S Feb 3, 2017 at 14:34 | history | notice added | John Alexiou | Draw attention | |
| Jan 31, 2017 at 19:31 | comment | added | John Alexiou | I have looked at this problem using numerical methods (FEA) and I was curious if there is an analytical approach out there. | |
| Jan 31, 2017 at 19:30 | history | edited | John Alexiou |
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| Jan 31, 2017 at 14:49 | history | asked | John Alexiou | CC BY-SA 3.0 |