/PROP/TYPE46 (SPR_MUSCLE)

Block Format Keyword This property describes a user-defined elasto-visco plastic material using user-defined functions to describe time dependent active and passive behavior for tension and (force vs. deflection or force vs. strain time and visco plastic and elastic).

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/PROP/TYPE46/prop_ID/unit_ID or /PROP/SPR_MUSCLE/prop_ID/unit_ID
prop_title
Mass Stiffness Vel_max Force Xk
fct_ID1 fct_ID2 fct_ID3 fct_ID4   Idens        
Damp EPSI              
Scale_t Scale_x Scale_v Scale_F    

Definitions

Field Contents SI Unit Example
prop_ID Property identifier

(Integer, maximum 10 digits)

  
unit_ID Unit Identifier

(Integer, maximum 10 digits)

  
prop_title Material title

(Character, maximum 100 characters)

  
Mass Element mass, or element density depending on Idens flag.

(Real)

 [ kg m ] or [ kg ]
Stiffness Initial element stiffness (for initial time step calculation).

(Real)

 [ N m ]
Vel_max Maximum velocity or strain rate.

(Real)

 [ m s ] MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamWaaeaada Wcaaqaaiaab2gaaeaacaqGZbaaaaGaay5waiaaw2faaaaa@39DE@ or [ 1 s ]
Force Initial force.

(Real)

 [ N ]
Xk Contact stiffness.

Default = initial element stiffness (Real)

 [ N m ]
fct_ID1 Time dependent scale function identifier (factor vs. time).

(Integer)

  
fct_ID2 Scale function identifier (depending on EPSI: (default = 0) factor vs. strain or factor vs. elongation).

(Integer)

  
fct_ID3 Scale function identifier (depending on EPSI: (default = 0) factor vs. strain rate or factor vs. velocity).

(Integer)

  
fct_ID4 Function identifier for (depending on EPSI: (default = 0) force vs. strain or force vs. displacement).

(Integer)

  
Idens Mass input variable flag.
= 0
Mass is per unit length (equivalent to density).
= 1
Mass.

(Integer)

  
Damp Damping coefficient.

(Real)

  
EPSI Deflection calculation flag.
= 0 (Default)
Strain
= 1
Elongation

(Integer)

  
Scale_t Scale factor for abscissa (time) for fct_ID1.

(Real)

 [ s ]
Scale_x Scale factor for abscissa (elongation) for fct_ID2 , if EPSI = 1.

(Real)

 [ m ]
Scale_v Scale factor for abscissa for fct_ID3.

If EPSI = 1: velocity

If EPSI = 0: strain rate

(Real)

 [ m s ] MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamWaaeaada Wcaaqaaiaab2gaaeaacaqGZbaaaaGaay5waiaaw2faaaaa@39DE@ or [ 1 s ]
Scale_F Scale factor for ordinate (force) for fct_ID4.

(Real)

 [ N ]

Example (Muscle)

#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/2
unit for prop
                  g                  mm                  ms
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/PROP/SPR_MUSCLE/2/2
MUSCLE
#               Mass             Inertia             Vel_max               Force                  XK
                .001                 .02               0.005                0.25                  .1
# fct_ID1    fct_ID2   fct_ID3   fct_ID4               Idens
        1          2         3         4                   1
#            Damping                EPSI
                0.00                   1
#             scalet             scale_X             scale_V             scale_F
                   1                   1                   1                 1.0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MOVE_FUNCT/1
scaling function 5
                 1.0                 0.1                 0.0                 0.0
/FUNCT/1
Force_vs_Time (active)
#              time          scaling factor
              0.0000          0.00000000
              0.9000          0.00000000
              1.0000          1.00000000
              2.0000          5.00000000
              3.0000          5.00000000
              4.0000          2.00000000
              5.0000          2.00000000
              6.0000          2.00000000
              7.0000          2.00000000
              8.0000          2.00000000
              9.0000         10.00000000
             10.0000         10.00000000
             11.0000          2.00000000
             12.0000          2.00000000
             13.0000         12.00000000
             14.0000         12.00000000
             15.0000         12.00000000
             20.0000          2.00000000
             29.0000          0.00000000
             30.0000          0.00000000
/FUNCT/2
Force_vs_Elongation (active)
                -1.0          1.00000000
                 0.0          0.00000000
                 1.0          1.00000000
#   0.100000000E+10          1.00000000
/FUNCT/3
Force_vs_Velocity (active)
     -0.100000000E+1          2.00000000
                0.00          0.00000000
              10.000          2.00000000
              20.000          1.00000000
              30.000          1.00000000
/FUNCT/4
Force_vs_Elongation (passive)
                -1.0         -3.00000000
                 0.0          0.00000000
                 1.0          3.00000000
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#ENDDATA
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

Comments

  1. Total force is:(1)
    F = F o r c e ⋅ f 1 ( t S c a l e _ t ) ⋅ f 2 ( x S c a l e _ x ) ⋅ f 3 ( x ˙ S c a l e _ v ) + S c a l e _ F . f 4 ( x S c a l e _ x ) + D MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbb a9q8WqFfeaY=biLkVcLq=JHqpepeea0=as0Fb9pgeaYRXxe9vr0=vr 0=vqpWqaaeaabiGaciaacaqabeaadaqaaqaaaOqaaabaaaaaaaaape GaamOraiabg2da9iaadAeacaWGVbGaamOCaiaadogacaWGLbGaeyyX ICTaamOzamaaBaaaleaacaaIXaaabeaakmaabmaapaqaa8qadaWcaa WdaeaapeGaamiDaaWdaeaapeGaam4uaiaadogacaWGHbGaamiBaiaa dwgacaGGFbGaamiDaaaaaiaawIcacaGLPaaacqGHflY1caWGMbWaaS baaSqaaiaaikdaaeqaaOWaaeWaa8aabaWdbmaalaaapaqaa8qacaWG 4baapaqaa8qacaWGtbGaam4yaiaadggacaWGSbGaamyzaiaac+faca WG4baaaaGaayjkaiaawMcaaiabgwSixlaadAgadaWgaaWcbaGaaG4m aaqabaGcdaqadaWdaeaapeWaaSaaa8aabaWdbiqadIhapaGbaiaaae aapeGaam4uaiaadogacaWGHbGaamiBaiaadwgacaGGFbGaamODaaaa aiaawIcacaGLPaaacqGHRaWkcaWGtbGaam4yaiaadggacaWGSbGaam yzaiaac+facaWGgbGaaiOlaiaadAgadaWgaaWcbaGaaGinaaqabaGc daqadaWdaeaapeWaaSaaa8aabaWdbiaadIhaa8aabaWdbiaadofaca WGJbGaamyyaiaadYgacaWGLbGaai4xaiaadIhaaaaacaGLOaGaayzk aaGaey4kaSIaamiraaaa@7976@

    Where, D = { D a m p ⋅ min ( x ˙ , V e l m a x )   i f   x ˙ > 0 − D a m p ⋅ min ( | x ˙ | , V e l m a x ) i f   x ˙ < 0 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVCI8FfYJH8YrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbb a9q8WqFfeaY=biLkVcLq=JHqpepeea0=as0Fb9pgeaYRXxe9vr0=vr 0=vqpWqaaeaabiGaciaacaqabeaadaqaaqaaaOqaaabaaaaaaaaape Gaamiraiabg2da9maaceaapaqaauaabeqaceaaaeaapeGaamiraiaa dggacaWGTbGaamiCaiabgwSixlGac2gacaGGPbGaaiOBamaabmaapa qaa8qaceWG4bWdayaacaWdbiaacYcacaWGwbGaamyzaiaadYgapaWa aSbaaSqaa8qacaWGTbGaamyyaiaadIhaa8aabeaaaOWdbiaawIcaca GLPaaacaGGGcGaamyAaiaadAgacaGGGcGabmiEa8aagaGaa8qacqGH +aGpcaaIWaaapaqaa8qacqGHsislcaWGebGaamyyaiaad2gacaWGWb GaeyyXICTaciyBaiaacMgacaGGUbWaaeWaa8aabaWdbmaaemaapaqa a8qaceWG4bWdayaacaaapeGaay5bSlaawIa7aiaacYcacaWGwbGaam yzaiaadYgapaWaaSbaaSqaa8qacaWGTbGaamyyaiaadIhaa8aabeaa aOWdbiaawIcacaGLPaaacaWGPbGaamOzaiaacckaceWG4bWdayaaca WdbiabgYda8iaaicdaaaaacaGL7baaaaa@6EB2@ ,

    f 1 , f 2 , f 3 , f 4 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbbG8FasPYRqj0=yi0dXdbba9pGe9xq=JbbG8A8frFve9 Fve9Ff0dmeaabaqaciGacaGaaeqabaWaaeaaeaaakeaaqaaaaaaaaa WdbiGacAgadaWgaaWcbaGaaGymaaqabaGccaGGSaGaciOzamaaBaaa leaacaaIYaaabeaakiaacYcaciGGMbWaaSbaaSqaaiaaiodaaeqaaO GaaiilaiGacAgadaWgaaWcbaGaaGinaaqabaaaaa@3FFE@ are functions fct_ID1, fct_ID2, fct_ID3 and fct_ID4