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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. 
    • Rahul Ponginan

      ユーザーフォーラムについて   10/22/17

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Wisawanart

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Wisawanart last won the day on May 9

Wisawanart had the most liked content!

About Wisawanart

  • Rank
    Beginner

Profile Information

  • Gender
    Male
  • Country
    Thailand
  • Interests
    Crashworthiness simulation with RADIOSS
  • Are you University user?
    Yes
  1. Residual stress mapping

    Hi I have a concept that I will manufacture the crashbox by using stamping simulation (Hyperform) and then I may get the residual stress results. For my crashbox, how can I map the residual stress into my model during preprocessing. (How many ways that can be used ? ) If you have some tutorials about this kind of problem please share me and also I need your valuable suggestion. Best regards Nut
  2. Reaction force on cross section

    Hi I defined the neccesary card for the cross section but as i said, i got the worst result as previous post. The picture below shown the area of cross section on the shell surface and also the card details.
  3. Reaction force on cross section

    Hi Yesterday, I have tried to determine the reaction force of the beam by applying the impact load (Drop test). I defined the cross sections not only on the beam surface (shell element) but also on the impactor (solid element). After solving, I found that , the cross section on solid element shown the reaction force perfectly but for the shell element, it shown the worst result (oscillation) and magnitude, These are shown as picture below, How can I determine the normal reaction force on the shell element by using cross section. Thank you for your kindness Best regards Nut
  4. Element Duplication (Overlapped)

    Hi George P Johnson I have another question also ,yesterday I have tried to determine the reaction force of the beam by applying the impact load (Drop test). I defined the cross sections not only on the beam surface (shell element) but also on the impactor (solid element). After solving, I found that , the cross section on solid element shown the reaction force perfectly but for the shell element, it shown the worst result (oscillation) and magnitude, These are shown as picture below, How can I determine the normal reaction force on the shell element by using cross section. Thank you for your kindness Best regards Nut
  5. Element Duplication (Overlapped)

    Hello George Thank you for your method to solve my problem sincerely Nut
  6. Element Duplication (Overlapped)

    hello I faced with the problem while I organized from component 1 into component 2 , I duplicated elements in component 1, I think, It will be easier when I want to edit this element later. After that, I found out that many elements is added at the same location (Node), that meant, in displayed, we see 1 element but actually, it is overlapped. How can I fix the problem instead of delete and create it again. Thank you for your answer Best regards Nut
  7. Hi Mr. Prakash Pagadala Thank you for your kindness. As I am out of office, I will let you know tommorow. Sorry for inconvenience. Best regards Wisawanart
  8. Hi Mr. Prakash Pagadala Firstly, thank you for your answer and also sorry for my English comprehension. From previous post, I intend to mean, If some nodes are both slave and master, this condition will be incompatible for RADIOSS right? Best regards Nut
  9. Hi Mr. Prakash Pagadala I am wondering concerning this analysis type (geo non-linear (impl static)) when I used this type the solver shown they have some contact error as post above. That mean, Radioss did not allow to has double contact in one contact group right? After this problem, i tried to set this problem also, I analyzed by using non-linear quasi-static type ,then the result did not convert also. Do you have some tutorial that related to geo non-linear (impl static) type so I want to follow your recommended tutorial to understand in this problem. Best regards Nut
  10. Hi Firstly, I would like to thank for your answer. I tried to analyze the roof crush problem in optistruct, I set up the parameter as following. The vehicle structure, I defined the contact type as freeze. For the rigid plane that press the vehicle body, I defined the slide contact. And also, Analysis type, I used Geo non-linear (Impl static). While I am running the problem, the solver interface shown that they used Optristruct solver, after that, i think, they changed to RADIOSS solver. *** ERROR # 4001 *** Running RADIOSS starter, 151 ERRORs and 53 WARNINGs have been detected. They are listed below. STARTER ERROR: ERROR ID : 556 ** ERROR IN INTERFACE TYPE2 DESCRIPTION : -- INTERFACE ID : 5 -- INTERFACE TITLE : INTER_TYPE2_5 MASTER NODE ID=42374 IS ALSO SLAVE NODE OF ANOTHER INTERFACE TYPE2 STARTER ERROR: . . . The error details are shown as following picture Best regards Nut
  11. ...

    Please help, i would like to solve this kind of problems.
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    H
  13. Orthogonal meshing for crash

    Hello As the crash simulation will involve with the stress wave, therefore the orthogonality of each elements are necessary. Then, In hypermesh, they have got some meshing options that consider about the orthogonality or not ? Thank you for your answer Sincerely Nut
  14. Both kinetic energy and internal energy are not consistence!!

    That mean, I have to define the best time step value for this anlysis that have both computational consumption and less mass error right? So, i found that Tscale = 0.65 and Tmin=2.4e-7 both of this conduct to get 0.4 mass err ap[loximately. Many thank for your suggestion Sincerely
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