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Geometric Non Linear analysis help

Geometric Non Linear analysis help

Geometric Non Linear analysis help

(OP)
Hi,
How to define the TABLES1 entry for elasto-plastic analysis of a steel component?
If possible can anybody please provide me with the x and y co-ordinate values for the same?

Thanks

Bharat

RE: Geometric Non Linear analysis help

Dear Bharat,
This is an automated job done by the pre-processor, you need to know in advanced the values stress-strain points, then simply define a function and use it in the nonlinear behaviour of material, for instance here you are the nastran output I got using FEMAP & NX NASTRAN (SOL106) basic nonlinear analysis:

INIT MASTER(S)
NASTRAN SYSTEM(442)=-1, SYSTEM(319)=1
ID Femap,Femap
SOL NLSTATIC
TIME 10000
CEND
  TITLE = NX Nastran NL Static Analysis Set
  ECHO = NONE
  DISPLACEMENT(PLOT) = ALL
  SPCFORCE(PLOT) = ALL
  FORCE(PLOT,CORNER) = ALL
  NLSTRESS(PLOT) = ALL
  STRESS(PLOT,CORNER) = ALL
BEGIN BULK
$ ***************************************************************************
$   Written by : Femap with NX Nastran
$   Version    : 10.3.1
$   Translator : NX Nastran
$   From Model :
$   Date       : Thu Mar 08 11:47:25 2012
$   Output To  : D:\Scratch
$ ***************************************************************************
$
PARAM,LGDISP,1
PARAM,POST,-1
PARAM,OGEOM,NO
PARAM,AUTOSPC,YES
PARAM,K6ROT,100.
PARAM,GRDPNT,0
CORD2C         1       0      0.      0.      0.      0.      0.      1.+FEMAPC1
+FEMAPC1      1.      0.      1.
CORD2S         2       0      0.      0.      0.      0.      0.      1.+FEMAPC2
+FEMAPC2      1.      0.      1.
$ Femap with NX Nastran Material 1 : Steel-Rolled (MPa)
MATS1          1       1 PLASTIC               1       1    235.        
$ Femap with NX Nastran Function 1 : Steel_Rolled Stress-Strain (MPa)
TABLES1        1                                                        +       
+             0.      0.  .00114    235.   .0296    237.   .0392    255.+       
+          .0488    270.   .0583    283.   .0677    295.    .077    306.+       
+          .0862    315.   .0953   323.5   .1044   331.5   .1133   338.5+       
+          .1222   343.5    .131    348.   .1484   356.5    .157   360.5+       
+          .1655   364.2    .174   367.5   .1823   370.5      .2   376.7+       
+             .3    406.      .4    430.      .5    450.      .6    468.+       
+             .7    483.      .8    496.      .9    508.      1.    520.+       
+       ENDT
MAT1           1 206000.79230.77      .3  7.85-9 1.728-5      0.        +       
+           235.                
ENDDATA

Best regards,
Blas.

~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
 
IBERISA
48011 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog de FEMAP & NX Nastran: http://iberisa.wordpress.com/

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