Surface contact error

[prakhar5aug]

I have applied surface to surface contact using SOL 101 with sparse matrix solution following error encountered....
specified solution memory 7000 mb



*** USER FATAL MESSAGE 1250 (BIOWRT)
STATUS = 112, FILX = 1, LOGNAME = SCRATCH , NSBUF3 = 8192
FILE = c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.SCRATCH
BLKNBR = 659434
ERROR MESSAGE IS --
There is not enough space on the disk.
BIOMSG: ERROR 923 HAS OCCURRED IN ROUTINE IONAST , FILE INDEX = 1.
LOGICAL NAME IS SCRATCH
FILENAME IS c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.SCRATCH
STATUS = 112

********* NASTRAN FILE TABLE *********

INDEX LOGNAME STREAM_ID NAME
1 SCRATCH 00000001 c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.SCRATCH
2 OBJSCR 00000002 c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.OBJSCR
3 MASTER 00000003 c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.MASTER
4 DBALL 00000004 c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.DBALL
5 SCR300 00000005 c:/users/z007941/appdata/local/temp/sht_pkb_02_sim1-solution_4.T2684_50.SCR300
6 MASTERA FFFFFFFA c:/ugs/nx7.5/nxnastran/nxn7p1/em64tnt/SSS.MASTERA
7 MSCOBJ FFFFFFF9 c:/ugs/nx7.5/nxnastran/nxn7p1/em64tnt/SSS.MSCOBJ
*** SYSTEM FATAL MESSAGE 4276 (IONAST)
ERROR CODE 923 PID= 0
USER INFORMATION: THIS ERROR MAY BE CAUSED BY EXCEEDING THE CAPACITY OF A SYSTEM RESOURCE.
(E.G., ALLOCATED DISK IS FULL, OR MAXIMUM FILE SIZE HAS BEEN REACHED)
*** USER INFORMATION MESSAGE 4276 (IONAST)
TO OBTAIN A NASTRAN DUMP RESUBMIT JOB WITH DIAG 44 INSERTED IN THE EXECUTIVE CONTROL SECTION.
1 * * * END OF JOB * * *


*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 201 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 303 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 204 WAS LEFT OPEN AT PROGRAM TERMINATION.

 

[Naffoussi]

Hi,

The error is coming from the space in your disk and not from the contact. Try to run the analysis in a local machine with sufficient space.

Regards,
SN

Seif Eddine Naffoussi, Stress Engineer

http://www.Innovamech.com

33650 Martillac – France

 

[prakhar5aug]

thanks for the reply
as i was not able to run on local machine i switched to iterative solver which solved the problem

i have modelled two sheets which are welded together by spot weld my problem is when i apply load the sheets passes through each other which should not be the case and when i use mesh mating condition the surface move together but there is no stress on spot weld.....so help in choosing the right constrain so that sheets do not pass through each other and are pulled by spot weld only...or should i used surface contact in sim file.....

 

[BlasMolero]

Hello!,
You do not say clearly which version are you using of NX NASTRAN but reading the listings it seems to me NX NASTRAN 7.5 running under NX AdvSim. In the past (many years ago) the iterative solver of NX NASTRAN did not supported surface-to-surface contact, then make your best to run the linear contact solution using the DIRECT SPARSE SOLVER, and make sure you have plenty of hard disk space as well as RAM memory!!.
Best regards,
Blas.

~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director

IBERISA
48004 BILBAO (SPAIN)
WEB:

http://www.iberisa.com

Blog de FEMAP & NX Nastran:

http://iberisa.wordpress.com/

 

[prakhar5aug]

hello,

Version NX 7.5 - with iterative solver it solves infinitely even after convergence any idea..??

memory problem with DIRECT SPARSE SOLVER, as I have meachine and version constraint suggest some method to define surface contact, I have already tried mesh mating condition but results are not to good...

 

[BlasMolero]

Hello!,
Here you are a video of how to define SPOT WELD models with FEMAP and NX NASTRAN:

http://iberisa.wordpress.com/2012/03/05/elementos-cweldcfast-en-femap-y-nx-nastran/

Best regards,
Blas.

~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director

IBERISA
48004 BILBAO (SPAIN)
WEB:

http://www.iberisa.com

Blog de FEMAP & NX Nastran:

http://iberisa.wordpress.com/