Cancel
Showing results for 
Search instead for 
Did you mean: 

Error in FEMAP after introducing nonliear elastic

Innovator
Innovator

Hi All

 

I use FEMAP 10

 

I checked the nonlinear elasticity in my material and created a nonlinear analysis, but I get the following error :

 

my material props are the same as the linear one, meaning : the young modulus , poison , etc

 

 

 

 

 

*** USER FATAL MESSAGE 316 (IFPDRV)
ILLEGAL DATA ON BULK DATA ENTRY MATS1
User information:
See Bulk Data entry description in Section 5 of the NX NASTRAN
Quick Reference Guide. If you are using the large field format make
sure the number of entries is even.
MATS1 2 NLELAST


M O D E L S U M M A R Y

NUMBER OF GRID POINTS = 43704

NUMBER OF CQUAD4 ELEMENTS = 43600

NUMBER OF RBE2 ELEMENTS = 2
NUMBER OF RBE3 ELEMENTS = 1
^^^ USER FATAL MESSAGE 9002 (IFPS)
^^^ ERROR(S) ENCOUNTERED IN THE MAIN BULK DATA SECTION
^^^ SEE MESSAGES ABOVE. ERROR ENCOUNTERED IN MODULE IFP,
^^^ USER FATAL MESSAGE
^^^ BULK DATA ERROR IN SOL601
^^^SOL601 FAILED
1 NONLINEAR- 2 DEGREES

8 REPLIES 8

Re: Error in FEMAP after introducing nonliear elastic

Gears Phenom Gears Phenom
Gears Phenom

Maybe you must add nonlinear stress-strain curve to your material because now it is nonlinear. Post here whole f06 file and part of dat file with material card, or whole femap model, if there are no restrictions on it.

Re: Error in FEMAP after introducing nonliear elastic

Innovator
Innovator

 

I have some restrictions yes

 

which parts of f06 are important ? 

 

I have not defined the sn curve , where do I insert that ? I didn't see an option for this 

 

my dat file

 

$ Femap with NX Nastran Material 1 : ISOTROPIC Material
MAT1 1 200000. .33 7.9-9 0. 0.
$ Femap with NX Nastran Material 2 : Nonlinear- ISOTROPIC Material
MATS1 2 NLELAST
MAT1 2 165000. .33 7.9-9 0. 0.

Re: Error in FEMAP after introducing nonliear elastic

Gears Phenom Gears Phenom
Gears Phenom

You define model via Femap or using text? Also you use SOL 106 or 601?

Spoiler
Define Material - ISOTROPIC.pngDefine Material - ISOTROPIC1.pngFunction Definition2.png

Note that you second pont of function must be sigma_yeld/E, sigma_yeld - no more, no less.

I will post here working example with nonliear plastic material, when i get to computer with it.

And also - you always can use linear material in nonlenear analisys - if you dont have nonlinear properties and you dont need it, then it will be the best solution.

 

Re: Error in FEMAP after introducing nonliear elastic

Innovator
Innovator

I use SOL601

 

after importing stress strain curve I get the same bulk error and that sol601 failed

Re: Error in FEMAP after introducing nonliear elastic

Gears Phenom Gears Phenom
Gears Phenom

Here are two examples with nonlinear properties. You can run models directly by using .bat file just change path to your femap directory.

Re: Error in FEMAP after introducing nonliear elastic

Innovator
Innovator

Thank you very much , but when I run them I get  fatal error  9002 and 316

Re: Error in FEMAP after introducing nonliear elastic

Gears Phenom Gears Phenom
Gears Phenom
Farzad

Quoting the error number doesnt help as much as you may think.

The F06 will give a much better description on the failure - if you post either the entire f06 or the last portion which contains the word "FATAL" people will be better equiped to help.

Re: Error in FEMAP after introducing nonliear elastic

Siemens Phenom Siemens Phenom
Siemens Phenom

In the bulk data file you should see material definition that looks like this:

nlelastic_text.png

 

 

 

 

 

 

 

 

You must select the function here:

nlastic_form.png

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The function must start at 0.0,0.0 if you define the 3rd quadrant only

 

Make sure you read the QRG for MATS1 to understand the input requirements.

 

Regards,