Composite failure constraints

Altair Community Member

Mar 9, 2016

Updated Oct 4, 2020 by SSnell

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,

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Altair Forum User

Altair Employee

Mar 10, 2016

Updated Mar 10, 2016 by Altair Forum User

Hi,

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

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

SSnell

Altair Community Member

Mar 10, 2016

Updated Mar 10, 2016 by SSnell

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 Employee

Mar 10, 2016

Updated Mar 10, 2016 by Altair Forum User

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 Employee

Mar 10, 2016

Updated Mar 10, 2016 by Altair Forum User

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