Geometric Non Linear analysis help

[Bharathsf]

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

 

[BlasMolero]

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

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