Internal material models

[Frank Richter]

Dear group,


according to the section on UMAT (and some other routines) in the "Abaqus User Subroutines Reference Manual", the term CMNAME within UMAT is defined as

"User-defined material name, left justified. Some internal material models are given names starting with the “ABQ_” character string. To avoid conflict, you should not use “ABQ_” as the leading string for CMNAME"


I am aware of precisely one "internal material model", but it appeared in recent releases only.

In the "SIMULIA Online Support System (SOSS)"
http://simulia.custhelp.com/cgi-bin/abaqus.cfg/php/enduser/home.php
one can access the answer ID 1658 "UMAT and VUMAT routines for the elastic-plastic simulation of Nitinol".

It is stated: "the name parameter on *MATERIAL must start with ABQ_SUPER_ELASTIC."

Has anyone ever heard of other "internal material models" ?? Where can they be found ?


Thanks for sharing your expertise of obsure origin, presumably gained through dark channels.


Regards

Frank

[Joshua Gorfain]

Frank,
 
I've used an internal VUMAT model for fabric reinforced composites called ABQ_PLY_FABRIC.  I found some documentaion on this model on the Abaqus knowledge base.
 
-Josh


________________________________
From: Frank Richter <abaqus-***@gmx.net>
To: ***@yahoogroups.com
Sent: Tuesday, February 28, 2012 10:11 AM
Subject: [Abaqus] Internal material models


 

Dear group,

according to the section on UMAT (and some other routines) in the "Abaqus User Subroutines Reference Manual", the term CMNAME within UMAT is defined as

"User-defined material name, left justified. Some internal material models are given names starting with the “ABQ_” character string. To avoid conflict, you should not use “ABQ_” as the leading string for CMNAME"

I am aware of precisely one "internal material model", but it appeared in recent releases only.

In the "SIMULIA Online Support System (SOSS)"
http://simulia.custhelp.com/cgi-bin/abaqus.cfg/php/enduser/home.php
one can access the answer ID 1658 "UMAT and VUMAT routines for the elastic-plastic simulation of Nitinol".

It is stated: "the name parameter on *MATERIAL must start with ABQ_SUPER_ELASTIC."

Has anyone ever heard of other "internal material models" ?? Where can they be found ?

Thanks for sharing your expertise of obsure origin, presumably gained through dark channels.

Regards

Frank
--
----------------------------------------------------------
Frank Richter
Institute of Materials Science
Ruhr-Universitaet Bochum
Bochum
Germany



[Non-text portions of this message have been removed]

[fcn_public]

Hi Frank,

Post by Frank Richter
I am aware of precisely one "internal material model", but it
appeared in recent releases only.
It is stated: "the name parameter on *MATERIAL must start with
ABQ_SUPER_ELASTIC."
Has anyone ever heard of other "internal material models" ?? Where can they be found ?

I don't know the current state of things, but the Nitinol material model (for shape-memory alloys, including the martensitic transition) was sold separately by Simulia, as an add-on to ABAQUS. I guess other such add-ons are classified as "internal" models, as well as custom developments (Simulia also provides such consulting services)

Not really an answer to your question, but rather to a possible list of such materials...

Fernando