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  1. beastgod

    Pretension of bolts (psmesh and sload) in APDL

    Hello! I need to analyze vessel with bolts. so I need to get pretension stresses in bolts. I used commands for this - psmesh and sload, but they don`t work. I have read help for a lot of times. then I decide to create a simple model, but it doesn`t work as well because of constraints. could you...
  2. beastgod

    Convergence problems with ANSYS Workbench SOLID 65 finite element

    Usually solid65 have bad convergence and requires appropriate data. We tried to find optimal parameters for concrete and we presented our results here (in Russian) http://cae-cube.ru/opredeleniye-optimalnykh-parametrov-rascheta-betona.html I hope it may help you especially if you use...
  3. beastgod

    How to get temperature at each node on a specific surface

    Hello! Try to use this program ESEL,S,MAT,,№№№ (№№№ - your material number) NSLE,S,corner *GET,MAX_NODE,NODE,,num,max *GET,Min_NODE,NODE,,num,min *DIM,temp_n,ARRAY,MAX_NODE,6,1 *DO,I,Min_NODE,MAX_NODE *GET,temp_n(I,3),node,i,bfe,temp *ENDDO so now you have the array with temperature, which you...
  4. beastgod

    a lot of load cases

    Thaks for your answers! So I think in my case the only way is using my engineering knowledge. Thus I don`t want to consider the wind load while I evaluate ratcheting. And I try to choose the worst direction of the wind to delete the most of cases while I evaluate protection from plastic...
  5. beastgod

    a lot of load cases

    Hello everybody. I have a column vessel. It has the loads: D, P, W. Let L and T equal 0. So, I would like to evaluate the column according ASME BPVC VIII div2. I use elastic-plastic analysis, so I use load combinations from table 5.5. 1) 2,4(P+D) 2) 2,1(P+D)+1,7W As you know, W has different...
  6. beastgod

    Bent in shell of pressure vessel (residual stresses)

    to TGS4- OK, thanks for invitation, I will try to compare. to MJCronin- Here pictures: sizes of bents http://files.engineering.com/getfile.aspx?folder=d3a86f5d-3858-4727-ae06-e3d756d91c03&file=1.png. a general form...
  7. beastgod

    Bent in shell of pressure vessel (residual stresses)

    I have a pressure vessel with bent in its shell. So I want to evaluate this vessel acc. ASME BPVC VIII div.2 Part 5 in elastic-plastic method. My way- 1) I build a geometry model of the vessel with the bent. 2) Use the appropriate procedure describing in ASME Here I have a question- When the...
  8. beastgod

    SA-737 Moduli of Elasticity

    Great! But in Table 3-D.2M from ASME BPVC div.2 Section VIII it will be carbon steel the nearest group to determinate Ncss and Kcss? Yes? Thank you for help!
  9. beastgod

    SA-737 Moduli of Elasticity

    Hello everybody. I have steel SA-737 Gr.B Nominal composition is C-Mn-Si-Cb. Well, I use table TM-1 from ASME BPVC Section II part d to know Moduli of Elasticity to use it in calculations. What string shall I use? Material group A? Thanks for advance!
  10. beastgod

    Temperature load

    "c) Why is T in only one load case although P can`t exist without T as a rule. c) T is not temperature. See Table 5.2." Koefficients with loads only show us whether this load dominate in this case or not (or this load absent in this case at all) and probability its appearance. So...let we have...
  11. beastgod

    Temperature load

    c) I think the load T acts in a case when fixing the object does not allow to compensate temeperature free. Thus, in cases where the load T is not involved, I still use temperature to find the temperature distribution to automatically take into account the desired properties of the material, and...
  12. beastgod

    Load factors of local criteria in Elastic-Plastic analysis

    One more question please. Is the pressure in global criteria of design condition of table 5.5 equal the pressure of hydrostatic conditions??? I always think that hydrostatic pressure greater. so "1-Global Criteria; Perform E-P analysis with 2.4*(P+Ps+D) to achieve convergence 2-Hydrostatic...
  13. beastgod

    Temperature load

    Hello! I have some questions about temperature in pressure vessel. Suppose that I have pressure vessel which operation (or design - it doesn`t matter) loads only P, Ps, D and T. to evaluate the vessel I use elastic-plastic analysys acc. ASME VIII div.2 part 5. So I should use load combinations...
  14. beastgod

    Local criteria par 5.3.3 ASME VIII div2

    SEXP command - here I tried to explain my chain of actions http://files.engineering.com/getfile.aspx?folder=497cb5e1-677f-4a92-bc31-ba1081e293e9&file=2222.png Unfortunately, I do not have a chance to read your paper. So...you said that I should have fine mesh to get adequate results? I think...
  15. beastgod

    Element (PLESOL) and Nodal (PLNSOL) stress plots giving different results than ETABLE

    I don`t know exactly, whether I can help you or not. But here I tried to compare results in Nodes and Elements (in Russian). And this link lead to the one more similiar presentation (in English). May be you can find answers to your question... I would be glad if I can help!
  16. beastgod

    Local criteria par 5.3.3 ASME VIII div2

    Hello! Can anybody tell me how to evaluate local criteria (describing in formula 5.6 par.5.3.3) automatically for the whole object in ANSYS? I found solution for this: Use Element table. Create formula there and show in final Epeq/El. But there is a problem - element table can`t involute. So I...
  17. beastgod

    SHELL181 and linearization

    I tested different size of mesh and determined that the most optimal size is 4*t for shell181 (where "t" is thickness). Here is my work http://cae-cube.ru/opredelenie-optimalnogo-razmera-konechnogo-elementa.html I think it will be interesting for you. Sorry, but in Russian only...now I try to...
  18. beastgod

    SHELL181 and linearization

    Thanks for helping me, TGS4! I looked through 5-A.9-10 and had food for thought. So...in real life I evaluate huge objects as rectification column. http://files.engineering.com/getfile.aspx?folder=f282a1e0-725e-4e1c-874b-37d43a3e1582&file=column.jpg 1) It must be very small mesh to model welds...
  19. beastgod

    SHELL181 and linearization

    I have showed the stress results from one of the Design Load Combination - the pressure only (1,5 MPa). Because we can`t model welds using SHELL181, welds were not modelling. In attaches there is a picture with [display of element = on] to understand more clearly where is what...
  20. beastgod

    SHELL181 and linearization

    Thank you! I have read chapter V of ASME many times...but to the end did not understand all clearly. Here I did the simple example to understood better - the nozzle with reinforcing plate and shell. Load is only the pressure. Can you mark places where I should take stresses each categories? How...

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