Fatigue optimization

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

i am doing fatigue based optimization on automobile component can any one help me? what is is the procedure for that.

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited February 2017

    You can refer below tutorial of Optistruct.

    OS-5070: Fatigue Optimization of a Torque Control Arm

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    thanks rahul can i drop the simulation dec for you reference and idea?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    if possible attach that tutorial pdf for my reference if possible

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    I got that tutorial but that is free shape optimization.but i want to perform topology based optimization. how to perform it.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Hi Sudhanana,

     

    What is your design objective and constraints. Maybe we can help you with if you provide the details.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    There is no tutorial readily available for fatigue based topology optimization. But, you can refer to this presentation which talks about process flow.

    http://altairatc.com/europe/Presentations_2010/Session_01/PSA_Guye/Guye-PSA-Session1-Oct1.pdf

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    thanks praksh . i send my .fem file to u go through and get back.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Hi Sudhanana,

     

    I think your optimization setup is correct, Maybe you should need to play with the life/damage numbers to make it a feasible design.

    The user can put a fatigue constraint on either life or damage tolerances. The user defines a minimum value (lower bound) in terms of Fatigue Life while a maximum value (Upper Bound) in terms of Damage.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    I cant understand the steps .could you set the condition and send back my mail 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    I followed some steps what ever you told but i am getting some errors in card definition.please check and tell.i transferring my .fem file for you reference. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Hi Sudhanana,

     

    Your first deck is correct, You need to add fatigue constraint in DPTL card and not as a seperate response. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    what is DPTL card .available with which enviroment.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Hi Sudhanana,

     

    DTPL card is the topology information card. You can input Fatigue constraints on DTPL through Topology>> Parameters>> Fatigue Constraints as shown in the image.

    <?xml version="1.0" encoding="UTF-8"?>FatigueConstraint.PNG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2017

    Thanks

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2017

     I send my H3D file to u  i am not getting any optimized shape, what is the reason? .i created two responses that is life and volume.it is necessary ? but objective is minimize the volume . give your suggestions.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2017

    Hi Sudhanana,

     

    I did not received any file. But you can limit a constraint on volume fraction and use objective fuction as life to get a concept design

     

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