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  1. BuckTU

    How do you Insert a FEM buckling perturbation into a FEM cylinder?

    Hi Fellow engineers, If you run a buckling analysis and you want to use the buckling mode. To introduce a small buckling perturbation. Where do you have to look at? Eigenvalue and/or Eigenmodes? Is the (negative)frequency of any importance? Thanks in advance.
  2. BuckTU

    How do you Insert a FEM buckling perturbation into a FEM cylinder?

    Hi Fellow engineers, If you run a buckling analysis and you want to use the buckling mode. To introduce a small buckling perturbation. Where do you have to look at? Eigenvalue and/or Eigenmodes? Is the (negative)frequency of any importance? Thanks in advance.
  3. BuckTU

    How does a FEM program know when a pipe buckles, PART 2?

    Oké, so only gwolf agrees that if a perfect pipe will compress in a flat disk... [COLOR=red]but does someone know why a FEM program doesn't do this?[/color red] Without referring to any Euler or eigen value problems. What is the background of a FEM program, according to the pipe to disk...
  4. BuckTU

    How does a FEM program know when a pipe buckles?

    Dear FEM users, I have made a pipe FEM model from solid elements in Msc.Marc. If I axially compress this pipe, it will buckle. But if you thick about it…How does this FEM program know this? This perfect pipe in FEM has a uniform geometry and material properties. This FEM model will only be...
  5. BuckTU

    Has anybody ever used the Chaboche model?

    Hee Fellow engineers, I would like to know if someone ever used the Chaboche model in FEM, preferably MSC.MARC. I want to use the bauschinger effect in my FEM models. Thanx BuckTU
  6. BuckTU

    Does anyone have Ramberg_Osgood coefficients of C95 steel?

    BuckTU (Mechanical) 29 Jun 05 12:27 Hi fellow engineers, API C95 steel is what I'm trying to model. Does anyone have Ramberg_Osgood coefficients of C95 steel? These are hard to come by, because not very many people use the strain hardening. Or is there someone who has API C95 hardening...
  7. BuckTU

    Does anyone have Ramberg_Osgood coefficients of C95 steel?

    Hi fellow engineers, API C95 steel is what I'm trying to model. Does anyone have Ramberg_Osgood coefficients of C95 steel? These are hard to come by, because not very many people use the strain hardening.Or is there someone who has API C95 hardening curves.. Eitherway Thanx, BuckTU
  8. BuckTU

    Does someone have Ramberg-Osgood coefficents of 304L stainless steel

    Hi fellow engineers, Does someone have Ramberg-Osgood coefficients of 304L stainless steel or equivalent plastic strain curves? Or does anybody know where I can find good references. BuckTU
  9. BuckTU

    "Why does a perfect FEM cylinder buckle with axial compression?"

    Hi Fellow engineers, my question is short, but not simple. "Why does a numerical cylinder, without any imperfections, buckle in the FEM program MSC.Marc with axial compression?" I've worked with axial buckling and FEM programs for a long time now, but didn't ask this question to myself...
  10. BuckTU

    Theory on axial buckling of thick-walled pipe/cylinders?

    Hi fellow Engineer, this question (two parts) concerns buckling of "Thick-walled pipe/cylinders" under axial compression. (First)Could someone tell/explain me what the difference is between small- and large-deflection theory Or where I can find it on the-internet, because the papers/books...
  11. BuckTU

    Small or large deflection theory in buckling pipe/cylinders?

    Hi fellow Engineer, this question (two parts) concerns buckling of thick-walled pipe/cylinders under axial compression. An answer will vanish my engineering-blok... (First)Could someone tell/explain me what the difference is between small- and large-deflection theory Or where I can find it on...

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