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any question any answer in Abaqus Ansys and finite element modeling

eng.femiran's picture

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hi

i am ali reza

i cannot speeck english good but a need a help.my project is frp tup fill with concreat i want to modeling in ansys but i can not modelig failur tsai i need help.this is may work

/PREP7 
ET,1,SOLID65
ET,2,SOLID46
R,1,,,,,,, 
R,2
RMODIF,2,1,9,0,0,0 
RMODIF,2,7,0
RMODIF,2,13,2,-88,.32,2,3,.35, 
RMODIF,2,19,2,-88,.27,2,3,.48, 
RMODIF,2,25,2,-88,.26,2,3,.51, 
RMODIF,2,31,2,-88,.19,2,3,.51, 
RMODIF,2,37,2,-88,.46, 
CYLIND,50,0,0,100,0,90,
CYLIND,50,0,0,100,270,360, 
CYLIND,51.675,50,0,100,0,90,
CYLIND,51.675,50,0,100,270,360,
CYLIND,50,0,100,650,0,90,  
CYLIND,50,0,100,650,270,360,
CYLIND,51.675,50,100,650,0,90, 
CYLIND,51.675,50,100,650,270,360,  
VGLUE,ALL  
 
VSEL,S,VOLU,,12,15 
VATT,2,2,2,0
VSEL,S,VOLU,,1 
VSEL,A,VOLU,,9,11  
VATT,1,1,1,0
ALLSEL,ALL 
FLST,5,9,4,ORDE,9  
FITEM,5,1  
FITEM,5,-2 
FITEM,5,5  
FITEM,5,-6 
FITEM,5,47 
FITEM,5,-48
FITEM,5,88 
FITEM,5,91 
FITEM,5,93 
CM,_Y,LINE 
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y  
LESIZE,ALL,25,,,,1,,,1,
VSEL,s,VOLU,,1 
VSEL,A,VOLU,,9,15  
VSWEEP,ALL 
FINISH 
/SOL
NSEL,S,LOC,Z,  
DSYM,SYMM,Z, , 
NSEL,S,LOC,X,  
DSYM,SYMM,X,
ALLSEL,ALL 
ALLSEL,ALL 
NSEL,S,LOC,Z,650
FLST,2,3,1,ORDE,3  
FITEM,2,975
FITEM,2,981
FITEM,2,-982
FINISH 
/PREP7 
 
MPTEMP,,,,,,,, 
MPTEMP,1,0 
MPDATA,EX,1,,30413 
MPDATA,PRXY,1,,0.2 
TB,PLAS1,1,1,2,1
TBTEMP,0
TBPT,,0.0012,37
TBPT,,0.054,160
TB,CONC,1,1,9, 
TBTEMP,0
TBDATA,,0.8,0.99,4.25,-1,, 
TBDATA,,,,0.6,,,
MPTEMP,,,,,,,, 
MPTEMP,1,0 
MPDATA,EX,2,,38000  
MPDATA,EY,2,,38000  
MPDATA,EZ,2,,7800 
MPDATA,NUXY,2,,0.28
MPDATA,NUYZ,2,,0.28
MPDATA,NUXZ,2,,0.28
MPDATA,GXY,2,,3500 
MPDATA,GYZ,2,,3500 
MPDATA,GXZ,2,,3500 
NSEL,S,LOC,Z,650
  
FINISH 
/SOL

FINISH 
 
NSEL,S,LOC,Z,650
  
/SOLU  
FLST,2,3,1,ORDE,2  
FITEM,2,589
FITEM,2,-591
FLST,2,3,1,ORDE,2  
FITEM,2,589
FITEM,2,-591
 
/GO
D,P51X, , , , , ,UX,UY, , , ,  
  
ALLSEL,ALL 
  
NSEL,S,LOC,Z,100
  
FLST,2,3,1,ORDE,3  
FITEM,2,522
FITEM,2,524
FITEM,2,-525
 
/GO
F,P51X,FY,-5000
ALLSEL,ALL 
  
FINISH 
/POST1 
 
FC,2,S,XTEN,795
FC,2,S,YTEN,39 
FC,2,S,ZTEN,795
FC,2,S,XCMP,-533
FC,2,S,YCMP,-122
FC,2,S,ZCMP,-533
FC,2,S,XY,89
FC,2,S,YZ,89
FC,2,S,XZ,89
FC,2,S,XYCP,-1 
FC,2,S,YZCP,-1 
FC,2,S,XZCP,-1 
 
FC,2,EPEL,XTEN,
FC,2,EPEL,YTEN,
FC,2,EPEL,ZTEN,
FC,2,EPEL,XCMP,
FC,2,EPEL,YCMP,
FC,2,EPEL,ZCMP,
FC,2,EPEL,XY,  
FC,2,EPEL,YZ,  
FC,2,EPEL,XZ,  


FINISH 
/SOL
NSUBST,50,100,1
OUTRES,ERASE
OUTRES,ALL,1
AUTOTS,1
LNSRCH,1
NEQIT,1000 

SOLVE  
FINISH 
/POST1 
SET,LIST,999
SET,,, ,,, ,86 
FINISH 
/POST26
FILE,'file','rst','.'  
/UI,COLL,1 
NUMVAR,200 
SOLU,191,NCMIT 
STORE,MERGE
FILLDATA,191,,,,1,1
REALVAR,191,191
 
NSOL,2,560,U,Y, UY_2
STORE,MERGE

FINISH 
 

 

eng.femiran's picture

Dear Alireza,

I read this codes but ansys didn't.are you sure  this codes are correct?

but i guess what is your problem.

It can be related to frp material,or concrete material.give correct amounts and run again.

other thing is mesh,if your mesh sizes is large,try smaller.

be contact with us.

best regards.

www.femiran.com

 

hi,

i am modeling concrete beam with frp

but what ( real constant and material models) should i use for frp....

thanks 

eng.femiran's picture

 Hello,

It depends on your analyses and FRP type.there are so many FRP types with different propertis,For example the CFRP should been modelled as an isotropic linear elastic material. the unidirectional CFRP composite actually shows an orthotropic behaviour, but it was shown in many reffrences that only the axial modulus is of importance in an application of this type. The elastic modulus and strength should taken to be E(CFRP)=165 GPa and f(CFRP)=2 GPa respectively.The Poisson ratio of the CFRP composite was assumed to be 0.3

if you has more questions I'll be glad to help you. 

www.femiran.com

eng.femiran's picture

 I forgot to remind that if you want to model damage parameters for FRP, you should use Hashin Damage in ABAQUS..

good luck

www.femiran.com

hi,

i am trying to use solid185 for frp and inter205 for the cohesive .....these elements do not have real constant.....so how can i enter thiere thickness and failure criteria ?

i tryed this code but i am not sure that the program read it 

 for soli185

ET,7,185
keyopt,7,3,1

sectype,7,shell
secdata,1.2,,0

 
mp,Ex,5,165E6        !orthotropic material
mp,Ey,5,9.65E6
mp,Ez,5,9.65E6

mp,GxY,5,5.3E6
mp,GyZ,5,3.4E6
mp,GXZ,5,5.3E6

mp,PRXY,5,0.3
mp,PRYZ,5,0.45
mp,PRXZ,5,0.3

type,7
mat,5

FC,7,S,XTEN,2000       
FC,7,S,YTEN,
FC,7,S,ZTEN,
FC,7,S,XCMP,-2000  
FC,7,S,YCMP,
FC,7,S,ZCMP,
FC,7,S,XY, 
FC,7,S,YZ, 
FC,7,S,XZ, 
FC,7,S,XYCP,
FC,7,S,YZCP,
FC,7,S,XZCP,
FC,7,EPEL,XTEN,
FC,7,EPEL,YTEN,
FC,7,EPEL,ZTEN,
FC,7,EPEL,XCMP,
FC,7,EPEL,YCMP,
FC,7,EPEL,ZCMP,
FC,7,EPEL,XY,  
FC,7,EPEL,YZ,  
FC,7,EPEL,XZ,  

and for inter205

ET,6,INTER205
MPTEMP,,,,,,,, 
MPTEMP,1,0 
MPDATA,EX,4,,2500  
MPDATA,PRXY,4,,0.4 

TB,czm,4,,,expo
TBDATA,1,1.5,0.00318,0.00753

 

are these data enough?

and if i want to use solid46 and combin39 .....what datashould i enter?

thank you

 

can you tell me how to simulate the orthotropic material with elastic-plastic behavior in abaqus cae?

wael_alawsey's picture

hi brother iam trying to model rc slab with opening and strengthening that opening with CFRP sheets so i tried to select the engineering constants form the elastic window and selected the hashin damage and give it damage evloution but the CFRP still dont take more than 5 KN load till failure !!! it must take about 25 KN before failure occur please help me what should i do and to make the cfrp sheet more stronger ??by the way the parameters i used for engineering constants is 

80000   231000   80000   0.05   0.05    0.45   3700   79655   79655

and for the jashin damage is

4100   50   4100   50   100   100

and for damage evolution is

1   1000   1   1000

my cfrp E is 231000 Mpa and tensile strength is 4100 Mpa

so the upper parameters i calaculate them from excel sheet belong to my friend 

and my cfrp sheet is unidirectional 

please help . . . . 

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