Composite failure constraints

SSnell
SSnell Altair Community Member
edited October 2020 in Community Q&A

Hi, I'm optimizing a composite model and I want to constrain the failure.
I created the composite failure response and then created the constraint applied to all of my loadcases with an upper bound of 1.

I don't see CFAIL as an output option in control cards so added CFAIL(ALL) = ALL to the .fem file or in CASE_UNSUPPORTED_CARDS  in control cards.

Observing the results in hyperview show that only ply failure is observed by the optimization and that bond failure is not.

Is there a different form of  failure constraint that would allow the optimization to adhere to bond failure as a constraint?

 

Thanks,

Welcome!

It looks like you're new here. Sign in or register to get started.

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Hi,

     

    Can you try CFAILURE instead of CFAIL as shown in the image below, please?

    <?xml version="1.0" encoding="UTF-8"?>Capture.JPG

  • SSnell
    SSnell Altair Community Member
    edited March 2016

    My mistake, I meant to say *CFAILURE in my original post, that's what I have been using. is there another constraint to make bond failure a constraint?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Hi SSnell,

     

    there is only composite failure available.

     

    I will check if there is a work around to use bond failure as a response and will get back to you soon.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    BTW, which failure criteria are you using for your analysis?

  • SSnell
    SSnell Altair Community Member
    edited March 2016

    Thanks a lot for the reply, I'm using Tsai-Wu, the failure response is composite failure, and The upper bound for the constraint is 1.

    A work around for bond failure would more than answer my question. Thanks

Welcome!

It looks like you're new here. Sign in or register to get started.

Welcome!

It looks like you're new here. Sign in or register to get started.