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  • Users: frd03
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  1. 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)...
  2. 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
  3. 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)...
  4. 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...
  5. 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 )...
  6. 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 )...
  7. 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 )...
  8. 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...
  9. 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...
  10. 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...
  11. frd03

    Flexibility Analysis

    Hello everyone, Some weeks ago I started a discussion about the rules presented in ASME code to flexibility analysis, in special about the allowable stress SA ( due to thermal displacements )which were got from Markl paper. I have studied some models (with Abaqus - FEA) with nonlinear...
  12. frd03

    Ciclic Loadings

    Hello, All ! I am a new user with Abaqus 6.5 and would like to develop a model to verify the level of stresses before and after a ciclic loading ( with temperature and pressure on a pipe ). One case the level of loading will reach the yeld point ( local plastic strains ) and the second case...
  13. frd03

    Starting with Abaqus

    Hi ? I would like to start to work with Abaqus 6.5 but I am not getting to find tutorials or examples using tools- box/windows, etc. only statement lists. How could I get this material ? Thanks
  14. frd03

    Pipe Stress Relaxation

    Hello everyone, In spite of to use the rules presented in ASME code to flexibility analysis, recently I solved to study the origins and concepts about allowable stress SA and I found the paper wrote by A.R.C. Markl (1956 )which was applied by ASME to piping-flexibility analysis. The stress...

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