Altair RISE

it issue have yet solved in NONLINEAR geometry implicit solver in optistruct (it uses radioss ), but i have got a task to convert it in quasi-static nonlinear static.

small ribs have distorted while plate has deformed.

have you got any idea, guys?

Altair Forum User

Hi,

Can you try with Large displacement analysis?

Here I am attaching a small model file with LGDISP activated and has an edge to Surface contact,

Unable to find an attachment - read this blog

Altair Forum User

hello @Prakash Pagadala!

of course, i have used large displacement analysis. it's my first goal to use nlstat large displacement analysis instead implicite nonlin-geom analysis.

thanks a lot, i'm going to see your file!

could your give me any advice how to solve large strain in my issue?

i think the problem is large distortion of elements.

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

Altair Forum User

Hi,

Could you please share the entire.out file, please?

Altair Forum User

easy.)

Unable to find an attachment - read this blog

Altair Forum User

i use monitor, i can see that this is going wrong.

Altair Forum User

you can see, i tryed to use finner mesh, but it didn,t help.

i'm just newbie in altair solvers, i have been using abqs for a long time.

Altair Forum User

Hi,

I can see that you are using PCONT with FREEZE on it. Is there a reason for that?

Can you change the stiffness on PCONT to AUTO instead of soft and check if that helps?

Also, please add CNTSTB card.

Altair Forum User

I can see that you are using PCONT with FREEZE on it. Is there a reason for that?

Can you change the stiffness on PCONT to AUTO instead of soft and check if that helps?

Also, please add CNTSTB card.

No. i have written about it in privious message. i've done finner mesh, i thought it will has helped. but i was wrong. there mesh has been connected grid to grid. i had released it and did finner mesh. and after it i've done TIE (for altair it's freeze). do you understand my explanation?

thanks, i will try to use your advice and after it i will write about the results.

Altair Forum User

unfortunately, it didn't help. element has been fully distorted.

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

Karthic_22061

Hi @Mrt @Prakash Pagadala,

I am also facing the same issue of high element distortion. Any updates to solve this issue

Altair Forum User

Hi,

Can you try with ADJUST?

Altair Forum User

i haven't still solved it issue=(

Altair Forum User

Can someone share a test file?