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  1. Ishmael

    WCSRF (Weld Creep Stress Reduction Factor) & ASME VIII-1/VIII-2

    Thank you, doct9960 :-)
  2. Ishmael

    EN13445

    Issue 27 (june 07) of EN 13445-3 introduces Cap. 19 about creep.
  3. Ishmael

    WCSRF (Weld Creep Stress Reduction Factor) & ASME VIII-1/VIII-2

    Sorry, my latest supplement (7) of BVPC only arrives to 2604. I'm doing a comparison between Div2 and EN13445 as per creep design is concerned. I'll ask our supplier if new supplements are available, but in the meanwhile I wonder if you could summarize the 2605 topics. Thanks Ishmael
  4. Ishmael

    VIII Div 2 - Part 8 Hydraulic Test Pressure Limits

    Thank you so much TGS4 and prex, now it makes much more science. I remember I read in the ASME (probably old DIV2 Appendix 4) that local membrane are actually secondary stresses but treated as primary, but without your help I probably wouldn't have sorted it out. As per the limit Load, is...
  5. Ishmael

    VIII Div 2 - Part 8 Hydraulic Test Pressure Limits

    Sorry, Pb is the primary bending stress, of course.
  6. Ishmael

    VIII Div 2 - Part 8 Hydraulic Test Pressure Limits

    I have a question about the upper limit for a hydraulic test pressure according to Sect VIII Div 2, 8.2.1. According to paragraph e), which refers to 4.1.6.2.a, the test pressure shall not exceed that value which results in the following equivalent stress limits: Pm<=0.95 SY and Pm+Pb<=1.43 SY...
  7. Ishmael

    2007 DIV2 Limit Load, Tables 5.4 and 5.5

    jte, I understand your concern. Just some explanations. a) 70 and 50 psi are two sample values, used just for the sample, although I actually deal with vessel in that pressure range. b) I cannot disclose further details, but the vessel has some shape discontinuities that cannot be handled by...
  8. Ishmael

    2007 DIV2 Limit Load, Tables 5.4 and 5.5

    TGS4, thanks for your reply. As I said in the opening post, I read all the 4.1.5.2 definitions, before posting. As you correctly pointed out, a good part "n-1" knowledge is requested before going to part "n". Nevertheless, still was not sure about the correct answer. Please do not take my word...
  9. Ishmael

    2007 DIV2 Limit Load, Tables 5.4 and 5.5

    Hi, I have a simple but fundamental question about the Limit Load Analysis according to 2007 Div.2 part 5, and on the concepts of LFRD approach. Let's suppose I have to design a vessel with the following data: Design Pressure: 70psi Operating Pressure 50psi According to the assessment...
  10. Ishmael

    Best Harwdare Configuration

    Hi Greg, usually the models are linear, lot's of load cases, big number of dof (>300'000). Windows XP cannot address more than 3GB for a single process, afaik, even though it can handle up to 4GB of ram memory. Sometimes I do some non linear (plasticity and contact). In those cases it happens to...
  11. Ishmael

    Best Harwdare Configuration

    I've been asked to write down a specification in order to buy a new high end workstation for my company. This pc will be used mainly for FEM Modeling (Femap) and solving (NeNastran). Which is the best hardware configuration I should ask for? I'm puzzled about CPU (Intel Xeon or AMD), and...
  12. Ishmael

    temperature dependent properties of steel

    You are not going to find out the surface convection coefficient in the material database, as it depends on the boundary conditions. The same steel part will have very different coefficients in different conditions: it will vay with the heat exchanging medium (water, air), and its speed and...
  13. Ishmael

    Looking for FE package ~$10000

    You may have a look on Ne/Nastran bundled with FEMAP. I use it and I'm quite satisfied with it. THe web site is www.nenastran.com
  14. Ishmael

    Chart reader

    i've tried several programs for this tasks, the best i found out was Engauge Digitizer http://digitizer.sourceforge.net it's also free, opensource, available for win32 and linux. Anyway it's worth a try Hope that helps Andrea
  15. Ishmael

    FEMAP element border

    Irwin wrote: > it possible to switch on just the feature line or free edge? Usually i workout this situation switching on the curves visualization, setting an appropriate curve color (i.e. black). Of course this applies only if you have a geometry associated!
  16. Ishmael

    FEMAP element border

    In my humble opinion EDS already dropped down any effort towards FEMAP development. Take a look to the web site, it's never updated. No service packs, patches, no integration with Solid Edge... I've nothing against Femap developers, they've been always present and reactive when i asked support...
  17. Ishmael

    Some problems with Nastran

    snide, the plate bending moments MX MY are referred to the ELEMENT csys, not in the GLOBAL! Even if the elements in the two models look the same, their csys may be different, and consequently you would obtain different moments. Each element has his own coordinate system, take a look of the...

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