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Abaqus - Please help!

surot's picture

Hello,

I am a bit confused about a simulation of brittle cracking presented in "ABAQUS EXAMPLE MANUAL" 1.1.5 Collapse of a concrete slab. I was trying to re-simulate the example on my PC and I got really weird results force (RF3) vs. time read in the support point.

Please have a look at attached picture. I download the file mnneice_5.inp from Example 1.1.5 calculated and got totally different resuls. Does it have something to do with setting of my Abaqus software?

Can somebody do the same and check this out?

 Thank you very much for any help!

 Here the is the *inp file:

*HEADING

 CORNER SUPPORTED TWO-WAY SLAB TESTED BY MCNEICE

*NODE

 1,0.,0.

 13,18.,0.

 1201,0.,18.

 1213,18.,18.

*NGEN,NSET=Y-SYM

 1,13

*NGEN,NSET=X-SYM

 1,1201,100

*NGEN,NSET=LX2

 1201,1213

*NGEN,NSET=LY2

 13,1213,100

*NSET,NSET=ONE

1,

*NFILL

X-SYM,LY2,12,1

*ELEMENT,TYPE=S4R,ELSET=SLAB

1,1,2,102,101

*ELGEN,ELSET=SLAB

1,12,1,1,12,100,12

*SHELL SECTION,ELSET=SLAB,MATERIAL=CONC

 1.75,9

*REBAR,ELEMENT=SHELL,MATERIAL=SLABMT,GEOMETRY=ISOPARAMETRIC,NAME=YY

 SLAB,.014875,1.,-.435,4

*REBAR,ELEMENT=SHELL,MATERIAL=SLABMT,GEOMETRY=ISOPARAMETRIC,NAME=XX

 SLAB,.014875,1.,-.435,1

*MATERIAL,NAME=SLABMT

*ELASTIC

 29.E6, 

*PLASTIC

 50.E3, 

*DENSITY

7.3e-2,

*MATERIAL,NAME=CONC

*ELASTIC

 4.15E6,.15

*DENSITY

2.246e-2,

*BRITTLE CRACKING

459.8,0.

0.,5e-4

*BRITTLE SHEAR

1.,0.

0.,5e-4

*BOUNDARY

 Y-SYM,YSYMM

 X-SYM,XSYMM

 1213,3

*AMPLITUDE,NAME=RAMP,DEFINITION=SMOOTH STEP

0.,0.,1.,1.

*RESTART,WRITE,NUM=1

*STEP

*DYNAMIC,EXPLICIT

,1

*BOUNDARY,AMP=RAMP

1,3,3,-1

*MONITOR,NODE=1,DOF=3

***OUTPUT,HISTORY,TIME INTERVAL=5.00E-4

***ENERGY OUTPUT

**ALLKE,ALLSE,ALLIE,ALLWK,ALLAE,ETOTAL

***NODE OUTPUT,NSET=ONE

**RF,

**U,

*****

*ELSET, ELSET=QA_TEST

1, 12, 133, 144, 66, 67, 78, 79

*NSET, NSET=QA_TEST, ELSET=QA_TEST

*FILE OUTPUT,TIMEMARKS=YES,NUMBER=1

*NODEFILE, NSET=QA_TEST

U, 

*ELFILE, ELSET=QA_TEST

CKEMAG,

CKSTAT,

CRACK,

*OUTPUT, FIELD, TIME MARKS=YES, NUMBER INTER=1

*ELEMENT OUTPUT, ELSET=QA_TEST

 

 LE, 

*NODE OUTPUT, NSET=QA_TEST

 U, 

*OUTPUT, HIST, FREQ=999

*ENERGY OUTPUT, VAR=PRESELECT

*****

*END STEP

 

 

 

 

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