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May 26, 2014, 07:56 |
Bridgman Paradox?! Masters thesis
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#1 |
New Member
Kjetil
Join Date: May 2014
Posts: 4
Rep Power: 11 |
Hello!
Im working on my masters thesis, where Im looking into something that some would say is an unexpected answer. The setup is very simple: Arnfinn Solution.jpg Step 1: Faced with the seemingly trivial physical problem with a pressurized chamber with a bar protruding the chamber walls through sealing glands, most people opts for solution 1; no resulting axial force; T =0. Step 2: By reversing the pressure, there is 100% agreement that solution 2 gives the right answer. A compression force corresponding to the overall pistion effect. Step 3: Most people agree that lowering external pressure to negative gives a suction force and corresponding tension in the piston of T =∆pA. Then, the question is: Is not step 3 identical to step 1? And here are some screenshots from Openfoam: sigma xx.jpg sigma yy.jpg sigma zz.jpg Von Mises.jpg So, Why is there no axial force in the rod when pressure is applied from inside? The rod will fracture. Do you have an idea about why? Any ideas and/or suggestions are appreciated! |
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May 30, 2014, 04:40 |
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#2 |
New Member
Kjetil
Join Date: May 2014
Posts: 4
Rep Power: 11 |
I hope I posted in correct subforum?
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June 3, 2014, 10:30 |
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#3 |
New Member
Kjetil
Join Date: May 2014
Posts: 4
Rep Power: 11 |
Bump......
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June 6, 2014, 05:52 |
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#4 |
New Member
Kjetil
Join Date: May 2014
Posts: 4
Rep Power: 11 |
No ideas? no opinions?
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