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Hello all I have used Shell63 for modeling a pressure vessel on saddle, there is tow problems that I encounter when reading results!! 1- stress intensity results for top and bottom location are exactly the same while non equal stresses are expected(I used "shell,top" or "shell,bot" for ploting...

Hi all I wanted to know if there is any special elemet in ansys for modeling solid (rigid bodies) in ansys?

Hello every body I was trying to impeliment the new procedure of Flexible shell Element design in Ansys but there are some points I can not underestand clearly!! 1- How can I model the solid end cap in ansys I hav tried using a very larg moduls of elastisity to simulate the end cap but did not...

THank you very much it was realy helpfull,

THank you all one question that still remains for me is that, the G5 materials are produced through a diffrenet fabrication procedure or they are exactly same as the material with no G5 note and only different test conditions lead to higher allowables for these materials?? what dose short term...

Dear all Usually materials with "note G5" have allowable stresses higher than the same material without "note G5"; Why allowable stresses for these materials are higher? when can I use materials with "note G5"? is there any diferrence in fabrication of these materials? any help is appreciated!!

Yes I have heard about TEMA 9th edition but I have not seen or study it, but I checked several exampls with Ansys and NO such decrease of spring rate was observed. as far as I followed the procedure of TEMA 8th edition, in RCB-8.31 a discontinuity in parameters C6 and C7 was found ::!!!?? (it is...

dear All have any body noticed that when "thickness of an expansion joint" exceeds that of the adjacent shell, the spring rate of expansion joint(calculated based on TEMA RCB.8) drops sudenly. while an increas in the spring rate is expected!! example: \ sheel thickness...

mike: surly I would djack77494: thank you for your coments

Ok, thank you for sharing your valuable exparience, now I feel more confident about neglecting the effect of bellows. but as a research topic I may follow this case. Arash

hi mike thank you for your comments, I still have a question. with the expansion joints attached to the floating head the floating head is no longer free to move as a real floating head dose, I think the spring rate of expansion joint will have an important efect on the bending stresses in the...

I need to design a one pass floating tubesheet heat exchanger. inorder to compensate diffrentail thermal expansion a thin-walled expansion joint is going to be used on the floating tubesheet(floating tubesheet is conected to the shell cover by this expansion joint)!!! dose any body know of any...

for general theory of shell and plates "theory of plats and shells" by S.timoshenko is recomendable. there you can find drivation of governing equations of deflection of circular plates on elastic foundation which is the basis for tubesheet design. However for a detail underestanding of UHX...