Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

Non-Linear static contact with composites Error #4965

Hello,

I am running a nonlinear static analysis with a load applied over contacts and a displacement of a spc. When I switch to a composite material instead of steel, I keep getting error #4965.

I tried handling it with different contact parameters and the number of increments and iterations, but nothing changed. How do I solve this problem? Whats the reason for it?

Thanks.

3pkt_bend.hm

Find more posts tagged with

English

OptiStruct

v2020.1

Accepted answers

All comments

Adriano_Koga

can you share the .out file as well?

Adriano_Koga

for non-linear convergence issues, also take a look at these tips:

https://community.altair.com/community?id=community_blog&sys_id=538764ab1b3790d4a5f742eddc4bcba4

Jan-Eric Seidel

for non-linear convergence issues, also take a look at these tips:

https://community.altair.com/community?id=community_blog&sys_id=538764ab1b3790d4a5f742eddc4bcba4

here is the out file

3pkt_bend_nl.out

Adriano_Koga

here is the out file

try taking a look at these contact pairs reported by the out file.

Particularly close to nodes 1664 and 5097. Taking a look at the errors at these locations there's something wrong with these contacts.

You ight try to use a smaller step (NLADAPT) or to reduce the stiffness of the contact (using a PCONT property in your cotnact pair, with SOFT option).

Also request PARAM,NLMON,DISP to check what is going on, as it will write a separate .H3D file with all the increments, and you might see something there.

https://community.altair.com/community?id=community_blog&sys_id=538764ab1b3790d4a5f742eddc4bcba4