Recent content by mudmud35

cbrn: The BC's are the same on both Solid and Shell models. You are correct in the Shell model the BC's will also include the ROT restraints and they are also fixed. You see this is an underground buried pipe. So if that is the case the Assumption would be, there is no motion of the pipe...

Oh one last point I didn't add and it may not be of any importance but in case someone is asking. The wall thickness for the support plate is .25 inch.

prost: Answering your last question: The inner plate is welded to both inner 3 inch pipes and to the outer 10 inch pipe.

Thank you all for all the helpful hints. I will study the responses carefully.

Ok, The applied load is a evenly distributed load applied lateraly on both the 3" pipes. The 10" is fixed on both side in all directions. I included both plots one for the SOLID95 and the other for the SHELL93. Material same for all. Poison RATIO is...

Here is the picture you asked for.http://files.engineering.com/getfile.aspx?folder=64d8df7e-03d7-4f02-8402-823f4dc4e07e&file=OCT_2.tif

prost: I will check and try to load a picture of the model. Let me check. I completely understad that w/o seeing the model everyone could guess the answer and the problem.

prost: You are completely correct. Even though I have taken two advanced graduate courses in FEA Theory, most of my experience is academic and the last time I used ANSYS was 10yrs ago. But I do not have proper FEA mentoring. I am trying hard to do it on my own and unfortunately there are no FEA...

Corus: Thank you very much for the answer.

rb1957: No it did not have TET elemnt. The only element used were Brick shaped elements.

40818: This is what I heard from my previous Boss before he left but he didn't have the time to explain it. Meaning the need to use 3 SOLID elements at the thickness. You see this is the thing I am trying to understand from an FEA stand point. Because I know very well if my model and Bc's are...

EdR, When you say more information. Could you let me know what you are looking for to help you understand the problem. Becasue I was trying to understand for such a problem, using SOLID Elements is not suited for modeling a 10NPS pipe with a wall Thikness of .365 and therefore the correct...

rb1957: thanks for the reply. Well in either case ihad very refined meshes. Do be more specific. I am designinghan underground burried pipe. 10" NPS Jacket pipe 1ft long, consiting of two 3" NPS core pipes. The Jacket pipe Completely fixed on both sides The stress concentration occured at the...

UcfSE: I discussed it with my professor because I am the only ANSYS user in our engineering Dept. and my director who was the expert has resigned. So in general the only other source of knowledge in this area is my professor since he is also an engineering Consultant.

I was analyzing a buried pipe particularly 10NPS sch40 w/ 10.75 OD and wall thickness .365. Software used ANSYS10. I started modeling this pipe using SOLID95. Ran the analysis, The MAX. Stress intensity was 37000 psi represented by a stress concentration at a small area. I discussed the results...