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  1. napoleonm

    Link between ASME Div 1 and Div 2

    I see from Case 2695, this it is just for "part 4 div 2" and apply for the RULES application in that division, nothing from the design by stress analysis approach "part 5 in div 2". therefore from U-2(g) you just need to satisfy the inspector that the design is properly done. but still I cannot...
  2. napoleonm

    Link between ASME Div 1 and Div 2

    Thanks.
  3. napoleonm

    Link between ASME Div 1 and Div 2

    Is there any "statement" in ASME VIII div 1, that link div 1 with div 2?. Take as example a casting Y type strainer design by "DIV 1 - concepts" (even knowing that such component is not cover by div1"), is there any "alternative design route" in asme div 1 that link with div 2 (therefore I will...
  4. napoleonm

    2007 B&PV Division 2 Part 5 Secondary & Peak Stress Clarification

    Prex: The term: “gradient through plate thickness” mean bending across the thickness?... So for a thick wall vessel (Rm/t = 1.34) the bending stress across the wall away from discontinuities (so we are in the shell), the bending due to internal pressure only is classified as secondary stress Q...
  5. napoleonm

    Stress classification for a Thick pressure vessel at central section

    A got a thick “Tee” component under internal pressure only, I would like to know how to classify the stress in a section where no influence of the of the gross geometrical discontinuity (the junction bend of the tee) is affecting the stress at the point where I am evaluating the stress...
  6. napoleonm

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    I would like to know how peaktop makes his calculations to get the values of the table.. peaktop please if you can send one of yours calcualtion I will check it, I am wondering how he or she do his cals. Thanks.
  7. napoleonm

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    just to make it clear ( I did a copy paste from world): so it did not take the exponent in the equations: Tau = (2.4 - lbar)^phi .... eq 1 phi= 0.25 + (0.535 (lbar)^8)/(0.05+(lbar)^7) .... eq 2 solving for l/dh = 1 so lbar = 1: phi= 0.25 + (0.535 (lbar)^8/(0.05+(lbar)^7)=...
  8. napoleonm

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    Here a copy of Diagram 8-3 from Ildechik 3th edition. What is right: the table or the ecuation?. The equation for tau does not works if you check with the table given. As example let take l/dh = 1 so lbar = 1 Table stand: tau = 0.24 From equation Tau = (2.4 - lbar) phi Where phi= 0.25 +...
  9. napoleonm

    Test data, Mechanical properties

    Thanks. I knew already about this page, The best for elastomeres and plastic like materials if you want to perform FEA. I just would like is to increase my data base in elastomers. For those how has data and want to calculate the constants for different models: http://www.hyperfit.wz.cz/
  10. napoleonm

    Test data, Mechanical properties

    blckwtr Did you finf by the end any test data with rubber?. if is so, could you be able to share this data with me?., please let me know.
  11. napoleonm

    Pro/mechanica and plastic like materials

    Mark. Have a look at the theread thread828-184976 plastic analysis.
  12. napoleonm

    Modelling of a perforated sheet metal.

    Well, If your pressure load produce a deflection less than half of the thickness, a lineal assumption is Ok. and as mark said:"My panel will be all the time in the elastic region", so a lineal analysis will be valid. if you got the option of large deformation in your software, will be usseful...
  13. napoleonm

    Modelling of a perforated sheet metal.

    Hello every body. I believe this is a typical FEA study case, and the interpretation of boundary conditions are critical even if it seen to be a simple problem. I agree with gwolf2, you can find some information about strength calculation for perforated sheet metal on...
  14. napoleonm

    Mechanical with plastic analysis.

    brep @ you are right, it was my written mistake. cheers.
  15. napoleonm

    Mechanical with plastic analysis.

    well, in wildfire 4 I know that support for hyper-elastic models (ruber, plastic materials) were ADDED, so you can perform lineal analysis with large elastic deformation on ruber materials. Know, from John Buchowski (Director Simulation Products PTC Product Management) I got the answer: "I...
  16. napoleonm

    Section VIII Div 1 versus Div II

    Basiclly. Div 1 is a "concervative way to design" a pressure vessel based by rule (following equations). Div 2, is a alternative way to design a pressure vessel, in a more "Economical" point of view; regarding with the requeried material thickness: you will get less material thickness, but the...
  17. napoleonm

    Mechanical with plastic analysis.

    Does any body know when PTC will add non lineal material analysis into mechanical?. any comment about it?. Thanks.
  18. napoleonm

    Recommending a CFD Consultant

    I will say the best are CFDedign, have a look on: www.cfdesign.com or you can contact optima-design in UK (www.optima-design.co.uk)..David Ried..is the one. napoleon. regards.
  19. napoleonm

    tutorial about the use fo Fluent

    all the manual and user guide is on here: http://simba.ara.bme.hu/~cfd/fluent6.1doc/help/. (if ir doesn't works...go to yahoo.com and put: "fluent 6.1 user guide" and go to the http with .hu and here you will find it. regards.
  20. napoleonm

    what is the difference btw stress in von mises & max principle stress

    Remember that a state of stress is a complex organization of normal and shears stress matrix, so talking about principal or von misses stress is a way to see a specifically a state of stress, I mean: Von Misses is a combination of principal and shear stress view as a scalar (magnitude) perhaps...

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