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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 

Karthic

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About Karthic

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  1. Work Hardening slope

    Hi, , power law equation K is work hardening slope having unit of stress ? (i.e) H represents the K term in power law. Am i correct ? Please let me know
  2. Nonlinear Transient

    Hi Prakash, Thank You for the support and guidance.
  3. Strain

    Hi Prakash, Thank You for the support and guidance.
  4. Nonlinear Transient

    Hi Prakash, I need to plot the strain for my components that is yielding. What should be the inputs for material property card (In Optistruct) to get proper strain results? should i give the material yield value? or what else to be input
  5. Strain

    Hi, I need to plot the strain for my components that is yielding. What should be the inputs for material property card (In Optistruct) to get proper strain results? should i give the material yield value? or what else to be input
  6. Nonlinear Transient

    Hi Prakash, Sure. Attached here
  7. Dynamic Analysis

    Hi Rahul Rajan, I tried a simple case for nonlinear transient and its considering the dynamic effects as told in help I still wonder how come a nonlinear transient analysis takes dynamics(inertia / momentum) into consideration but the simple direct transient does not ? If non-linearity(Contact/ Geometric/ material ) is the difference between those two cases, how do they vary dynamically Please help me know the reason for it. Thank you
  8. Nonlinear Transient

    Hi Prakash, Thank you for your quick response I tried a simple case and its considering the dynamic effects as per your previous post. I still wonder how come a nonlinear transient takes dynamics into consideration but the simple direct transient does not ? If non-linearity(Contact/ Geometric/ material ) is the difference between those two cases, how do they vary dynamically (inertia / momentum) Please help me know the reason for it. Thank you once again
  9. Nonlinear Transient

    Hi Prakash, Thank you for reply, I have attached the TABLED1 content. My question is if i need to attain the displacement of 40mm in 3 sec instead of 7.5 sec. (i.e) i need to study the dynamic effect (increase in stress when moment and inertia comes into play) due to increasing the operating speed. Is this possible in nonlinear transient analysis
  10. Dynamic Analysis

    Hi Rahul, Thank you for the reply. I went through the help stating that nonlinear static will not take inertia and momentum, But nonlinear transient will take momentum and inertia into consideration. If so, Is it possible to solve the above with nonlinear transient case? Please let me know whether I am correct
  11. Dynamic Analysis

    Hi, I need to know how to perform dynamic analysis. As shown in image the hinged flap should open in a time of 1 sec and come to rest immediately after opening , the velocity of 40 mm/s to be given to the butterfly bracket for a time of 1 sec ( which makes the flop to open in 1 sec). I need to study the dynamic effect due to sudden acceleration & deceleration of flap during start and stop. Please help me how to do this in optistruct
  12. Nonlinear Transient

    Hi, I found that varying the event time from 7.5sec to 3 sec does not vary the result. Found stress results are independent of event time... Can you please share me a tutorial for impl dynamic.
  13. Nonlinear Transient

    Hi, I am doing non-linear transient analysis with LGDISP, In this case i need to study the dynamic effect (increase in stress) due to increasing the operating speed. Given enforced displacement using TABLED1 & TLOAD1. In TABLED1 the use defined displacement is 0 to 40mm in 0 to 7.5 sec. If i need to increase the operating speed. (i.e) 0 to 40mm displacement in 0 to 3 sec Will my dynamic results vary ? or its independent of time?
  14. PARAM, COUPMASS & WTMASS

    Hi, In case of Direct Frequency Response Analysis Wat is the differnce between the lumped mass matrix approach and coupled mass matrix (PARAM, COUPMASS) Also please tell what they actually mean practically ? WTMASS (Weight-To-MASS parameter, multiplier for the terms of the structural mass) what is the purpose of using this card and its physical significance
  15. H3d out

    Hi, I couldn't find NLRESTART and also PARM, NLMON in Hm14.0. Is it available only in 2017 version ?
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