Does Feap have a limit to the number of materials?

[Jaime]

I can't input my modeling including four kinds of materials, but I can input it including three kinds of materials.
How should I do?
*******************************************************************************************
modeling with four kinds of materials:
feap * * test on solution
2 2 4

MATE 1
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.7  2.5e12

MATE 2
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.7  5e9

MATE 3
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.75  2.5e12

MATE4
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.75  5e9


COORdinates
 1 0 10 10
 2 0 10 5
 3 0 5 10
 4 0 5 5
 5 0 0 10
 6 0 10 0
 7 0 0 5
 8 0 5 0
 9 0 0 0

ELEMents
 1 0 1 5 7 4 3
 2 0 2 1 3 4 2
 3 0 4 8 4 7 9
 4 0 3 6 2 4 8

BOUNdary restraint codes
 1 0 1 1

FORCe
9 0 10 0

END

INTER

*************************************************************************
three kinds of materials:

feap * * test on solution
9 4 3 2 2 4

MATE 1
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.7  2.5e12

MATE 2
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.7  5e9

MATE 3
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.75  2.5e12

COORdinates
 1 0 10.000000 10.000000
 2 0 10.000000 5.000000
 3 0 5.000000 10.000000
 4 0 5.000000 5.000000
 5 0 0.000000 10.000000
 6 0 10.000000 0.000000
 7 0 0.000000 5.000000
 8 0 5.000000 0.000000
 9 0 0.000000 0.000000

ELEMents
 1 0 1 5 7 4 3
 2 0 2 1 3 4 2
 3 0 3 8 4 7 9
 4 0 3 6 2 4 8

BOUNdary restraint codes
 1 0 1 1

FORCe
9 0 10 0

END

INTER

[K.Li]

You can use four kinds of materials in FEAP. Just make sure you tell FEAP your Number of material property sets is 4.

Code: [Select]

feap * * test on solution
9 4 4 2 2 4

MATE 1
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.7  2.5e12

MATE 2
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.7  5e9

MATE 3
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.75  2.5e12

MATE 4
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.75  5e9
.......



[Jaime]

thinks for your answer, but I have already set the forth material, it still does not work.
/*******************************my modeling as follows*********************************************/
modeling with four kinds of materials:
feap * * test on solution
9 4 4 2 2 4

MATE 1
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.7  2.5e12

MATE 2
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.7  5e9

MATE 3
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e10 0.3
    VISCoelastic term1      0.75  2.5e12

MATE4
  SOLId
    PLANe STRess
    ELAStic ISOTropic       7e09 0.3
    VISCoelastic term1      0.75  5e9


COORdinates
 1 0 10 10
 2 0 10 5
 3 0 5 10
 4 0 5 5
 5 0 0 10
 6 0 10 0
 7 0 0 5
 8 0 5 0
 9 0 0 0

ELEMents
 1 0 1 5 7 4 3
 2 0 2 1 3 4 2
 3 0 4 8 4 7 9
 4 0 3 6 2 4 8

BOUNdary restraint codes
 1 0 1 1

FORCe
9 0 10 0

END

INTER

[Prof. R.L. Taylor]

You are missing a space on MATE4 -> MATE 4

[FEAP_Admin]

(1) missing space between the E and the 4 in your MATE4 line
(2) there are no restrictions on the number of materials (beyond memory issues)

[Jaime]

You are missing a space on MATE4 -> MATE 4

Oh, my god! thank you very much. I feel I am so fool.

[Jaime]

(1) missing space between the E and the 4 in your MATE4 line
(2) there are no restrictions on the number of materials (beyond memory issues)

thank you very much, i am too stupid.

[Prof. R.L. Taylor]

No, it is easy to miss things like this.  We are adding some diagnostics in the next release that will warn you that feap things you have a "zero" material number.