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  • Users: imse
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  1. imse

    alter temperature values in the RTH file?

    I was wondering if I could change the temperture values in the RTH files of the transient thermal analysis such that any node with temperature above a particular 'X' value can be modified to become the 'X' value is there someway this could be done right after a particular step is calculated or...
  2. imse

    Non-convergence with yield strength and tangent modulus..

    Symmetric half of a Weld plate 18"*3"*3/8"; heat input: heat flux 1.05e8; convection from some surfaces for now.... temperature in Kelvin and properties are in SI units /PREP7 !* ET,1,SOLID70 !* !* MPTEMP,,,,,,,, MPTEMP,1,273.15 MPTEMP,2,373.15 MPTEMP,3,473.15 MPTEMP,4,573.15...
  3. imse

    Non-convergence with yield strength and tangent modulus..

    hi, I am doing a simulation of Submerged arc welding... using decoupled thermo-mechanical analysis... I obtained the pretty consistent transient temperature distribution (except for the first set of temperature distribution - probably due to the fact that welding begins at the corner of the...
  4. imse

    A36 steel or AISI1025 steel properties at high temperature

    hi, i have had trouble locating A36 steel or AISI 1025 steel temperature dependent properties(yield stress, young's modulus, tangent modulus, specific heat,..) at high temperature (melting point) for my welding simulation problem Could someone please guide me on this Thanx Robin
  5. imse

    how transfer 2d transient thermal to 3d for stress analysis

    i am try to model a welding simluation.. 18" * 3" * 3/8" First, I am only considering one-half part of the welding plate.. and the thickness of that one half is constant the heat is apply on the top surface (which would be my 2D plane)..
  6. imse

    how transfer 2d transient thermal to 3d for stress analysis

    Hi, how can a 2D thermal load (from transient thermal analysis)be transfered to a 3d model for stress and distortion analysis... I have seen a bunch of research papers using such a method... could someone please advice thanx Robin
  7. imse

    how to account for Latent heat of fusion

    Hi, I was trying to model in the latent heat of fusion, how do I get to keep the temperature at melting temp I tried using enthalphy values, where I appplied for 0 degree, 0 enthalpy and then couple of values around the melting temperature.. it seems to have no effect... maybe because the...
  8. imse

    heat flux value - W/m^2 or W?

    hi, I am trying to apply heat flux to the surface of an element, would the unit of the value that I enter be Watt/m^2 of just Watt... I know heat flux unit definition is W/m^2, but doesnt the Watt applied be divided by the area that it is applied to? thanx Robin
  9. imse

    is EKILL during simulation possible?

    is there someway i can find out on which element has a particular node? thanx Robin
  10. imse

    Scalar Parameter values dont get modified?

    drej, the last couple of times that I was solving the problem, i was using steady state analysis - as it was easier to see if the effects of scalar parameter changes Summary the modeling There is a block with dimension .25m x.075m x.00945m... additionally, several smaller blocks with...
  11. imse

    Scalar Parameter values dont get modified?

    Alex, no I am not aware of that.. could you please advice on this Thanx Robin
  12. imse

    Scalar Parameter values dont get modified?

    To answer Brian's question... if i was not to use the scalar parameter and do the modeling using 1e6 heat flux, it would give me a temperature distribution range of 76 to 419 degrees, while 1e7 gives 535 to 3953degrees. (I'm try to model submereged arc welding process) Drej, by inputing the...
  13. imse

    Scalar Parameter values dont get modified?

    Drej, First - element type is selected, material properties are assigned and the object is modeled and meshed Then using the scalar parameters, I assign values eg: Covection_left=10, initial_temp = 25, heat_flux = 1e6,time_step=1.... I then add the boundary condition(convection), load (heat...
  14. imse

    Scalar Parameter values dont get modified?

    Hi, (using GUI method) I have been trying to use scalar parameter to assign values to variables that I use in modeling the problem.. the first time I run the program it is fine, but when i modify these scalar parameters and re-run the program again, it computes result using the first set of...
  15. imse

    is EKILL during simulation possible?

    hi, I am trying KILL the nodes that come up with very high temperature, as they stop the program from running to its completion.. or even modify the temperature to melting point temperature What I am trying to do is simulate submerged arc welding (the object is complete insulated). When I...
  16. imse

    Preset Distortion/Stresses

    is it possible to obtain the opposite of a distortion or stress from an analysis and apply it back onto the model? Something like you get a values(distortion or stress) from an analysis and you want to apply the opposite value of the result obtained at the begining of the same analysis to...
  17. imse

    transient thermal analysis error

    when i apply the time-time step for a load step... would the new load step continue from where the previous load step left off with or does it begin with from zero for the new load step? eg.. if the first load step was to apply 450 degrees at node 1(end of time step is say 5sec, with step size...
  18. imse

    moving heat source

    i am trying to use the LSwrite function... would that be a good way to go about with this problem? thanx Robin
  19. imse

    transient thermal analysis error

    when i try to run a transient analysis for a thermal problem, i get the warning that reads: "Present time 0 is less than or equal to the previous time in the transient analysis" I click "proceed" then i get the error that read: "the step data was check and there were errors found" could someone...
  20. imse

    moving heat source

    could someone tell me how i could simulate a moving heat source? (my orginal problem is to do with stress analysis in welding) thanx Robin

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