Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Navigation
- Simcenter
- Forums
- Blogs
- Knowledge Bases

- Siemens PLM Community
- Simcenter
- 3D Simulation - Femap Forum
- Yield vs Temperature Function

Options

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

07-24-2016 03:10 AM

Dear All,

I define a function Yield stress vs temperature in Femap and setting this function in a non linear material definition Card (setting initial yield stress = 1) but when I run the analysis I obtain an error.

The solver consider yield stress = 1 and not considered the predefined function.

How I can properly define this analysis?

Best Regards

Stefano

Solved! Go to Solution.

6 REPLIES

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

07-25-2016 12:25 AM

If you are using Advanced Non-linear, you need to define a stress strain function for each temperature value. Then you need to define another Femap function, which is Type 5: Function vs Temp. This function will have as many data points as you have stress strain curves. Each data point will be the temperature value (X), and the Function ID (Y) of the function used to define the stress strain curve at that temp.

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

07-25-2016 03:05 AM

Hi,

I don't used Advanced non linear analysis but the classic non linear analysis (SOL 106).

This procedure is applied also with this solver?

Best regards

Stefano

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

07-25-2016 03:31 AM

Unfortunately, I don't recall if thermal plasticity works the same way in SOL106.

I know SOL106 has thermal elasticity, and it also has creep plasticity including thermal effects, but don't recall if it can do direct thermal plasticity without using a creep method.

I suggest you look at Chapter 6 of the "Handbook of Nonlinear Analysis (SOL106)" via the Femap menu: Help -> NX Nastran.

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

08-02-2016 02:30 AM

Hi,

I contacted Nastran support and I resolve the problem by manually entering MATST1card and associated TABLEM1 function (as reported in the attached figure).

Best regards

Stefano

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

08-02-2016 09:54 AM - edited 08-02-2016 09:55 AM

I will respectfully urge caution... GTAC may have advised how to produce temp dependent Nastran entries, but I suggest you check very carefully that those entries are producing the intended effect on plasticity if you are using SOL106.

Perhaps its a new feature not documented yet, which would be exciting, as SOL106 has not changed a great deal over the years.

And interesting that it does not use exactly the same entries as SOL601 (adv NL) for the same purpose.

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

08-03-2016 09:45 AM

Follow Siemens PLM Software

© 2017 Siemens Product Lifecycle Management Software Inc