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response to sum up element stresses

Altair Forum UserUser: "Altair Forum User"
Altair Forum User
Altair Employee
Updated by Altair Forum User

I need to define a response to sum up the stress values of all the elements in a component. What is the best way to do it? 

How the design equation should be defined?

 

Thanks,

Soraya

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    Altair Forum UserUser: "Altair Forum User"
    Altair Forum User
    Altair Employee
    OP
    Updated by Altair Forum User

    Hi Soraya,

     

    You can use external response (DRESP3) to sum stresses.

     

    Please refer to Size Optimization using External Responses (DRESP3) example. 

    Altair Forum UserUser: "Altair Forum User"
    Altair Forum User
    Altair Employee
    OP
    Updated by Altair Forum User

    Hi Soraya,

     

    I know this dates from quite a while, but is there any chance you've found a solution to your problem ? I am facing the exact same issue with Optistruct at the moment as I am trying to have a Stress-based aggregation function as my optimization response, but all of my efforts with DRESP2 have been fruitless so far. I am trying to code an external function using DRESP3 at the moment but I am not really sure how to do that, given that my input response is the static stress >  Von Mises one (which is a vector of the stress for each of the 100+ elements in the element set my response is defined on). I would really appreciate it if you could tell me of any workaround you've used to solve your problem.

     

    Thanks in advance

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