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Recent content by frd03

  1. frd03

    Local Buckling on Pipes

    Hello, In this case I would have a pressure and hot pipe (B31.1/B31.3). Thanks
  2. frd03

    Local Buckling on Pipes

    Hello, Iniatially would be pre-buckling analyse. Thanks
  3. frd03

    Local Buckling on Pipes

    Hello All, Please, What would be a good procedure to get the maximum loads (or contact pressure ) to avoid a local buckling in a pipe, for example : a straight pipe supported on the middle of span ( the region pipe/support ) and the maximum moment which could be applied on a curved pipe (elbow)...
  4. frd03

    Local Buckling on Pipes

    Hello all, Could be possible to simulate with Abaqus a local buckling on a thin pipe, for example: a straight pipe supported in the middle of span or to get the maximum moment to avoid the local buckling on curved pipe ? Thanks
  5. frd03

    Stress analyse and ASME Codes

    Hello John Breen, I understood you point of view and I agree with part of this but you also need to consider that the code procedures are the same for many years and all engineering sectors looking for solutions more adjusted and optimaizeds so technology and experience should give the hands in...
  6. frd03

    Stress analyse and ASME Codes

    Hello John Breen, Thanks for your traditional attention! If possible, I would like to continue a quite more this discussion and I really would apreciate your comments. 1) I did a plastic simulation with Abaqus FEA (including cyclic hardening) using a small pipe ( 11/2" sch40)...
  7. frd03

    Stress analyse and ASME Codes

    Hello John Breen, Thanks for your traditional attention! If possible, I would like to continue a quite more this discussion and I really would apreciate your comments. 1) I did a plastic simulation with Abaqus FEA (including cyclic hardening) using a small pipe ( 11/2" sch40)...
  8. frd03

    Stress analyse and ASME Codes

    Hello everyone ! I have studied the codes Asme B31.1 e B31.3 and I still did not find some answers for these questions which I would like to receive your comments and opinions: a) The self-springing effect from A.R.C. Markl paper, which introduced the displacement allowable stress SA, it had...
  9. frd03

    Creep on Abaqus

    Hello All, I would like make a Creep simulation to a steel pipe using Abaqus 6.5 and I am having some doubts about the parameters to input on properties. The power law that I know is: relative strain(time) = beta*Sigma^n and for my case I have the following parameters: Relative strain (time )...
  10. frd03

    Creep Simulation

    Hello All, I would like make a Creep simulation to a steel pipe using Abaqus 6.5 and I am having some doubts about the parameters to input on properties. The power law that I know is: relative strain(time) = beta*Sigma^n and for my case I have the following parameters: Relative strain (time )...
  11. frd03

    Creep

    Hello All, I would like make a Creep simulation to a steel pipe using Abaqus 6.5 and I am having some doubts about the parameters to input on properties. The power law that I know is: relative strain(time) = beta*Sigma^n and for my case I have the following parameters: Relative strain (time )...
  12. frd03

    Pipe Simulation

    Hell all, I am doing a thermal stress analyse (due to expansion ) in a pipe and the initial boundary condition to the ends of pipe would be encastre ( 06 dof lockeds )but I would need to release the radial expansion only in the ends keeping the encastre ( like a gap or "floating encastre" )this...
  13. frd03

    Special Boundary Conditions

    Hello All, I need make a simulation which I have a pipe under thermal loading and your boundary ( end of pipe )is connected to a device (flange) which has a radial displacement to temperature expansion, too Initially my pipe need a boundary constrain with 06 dof equal to zero but the radial...
  14. frd03

    Thermal Cicling and Stress Relaxation

    Thanks Yoman228 , Please, Could you explain me what are these parameters e your units ? Did you already do some similar modelling to verify "stress relaxation " what would have been your evaluation ? Thanks
  15. frd03

    Thermal Cicling and Stress Relaxation

    Hi all, I started recently to work with Abaqus using thermal cicling loading and plasticity. To a first model ( a carbon steel pipe ) I used several steps increasing and decreasing the temperature values ( temp. room up to temp. max. and return to room ) and initially I think that were...

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