/INIBRI/STRS_F

Block Format Keyword Describes the initial state (full stress in local system, values for each integration point) for a brick.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/INIBRI/STRS_F/unit_ID
If STRS_F and 8-node solid element with 1 or 8 integration point
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
brick_ID Nb_integr Isolnod Isolid            
For each integration point (Nb_integr > 0)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Eint ρ            
σ   1 σ   2 σ   3        
σ   12 σ   23 σ   31        
ε   p                
If STRS_F and 16-node or 20-node solid elements, 8-node HA8 element; 8-node HSEPH elements, 6-node PA6 elements, 10-node tetrahedron or Pentahedron 6-nodes.
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
brick_ID Nb_integr Isolnod Isolid            
For each integration point (Nb_integr > 0)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
σ   1 σ   2 σ   3        
σ   12 σ   23 σ   31        
ε   p Eint ρ        

Definitions

Field Contents SI Unit Example
unit_ID Unit Identifier

(Integer, maximum 10 digits)

  
brick_ID Element identifier.

(Integer)

  
Nb_integr Number of integration points.

It corresponds to the property definition of this element.

(Integer)

  
Isolnod Number of nodes of solid element.

(Integer)

  
Isolid Solid elements formulation

It corresponds to the solid elements formulation of in property definition of this element.

(Integer)

  
ε p Plastic strain

(Real)

  
σ 1 Stress

(Real)

  
σ   2 Stress

(Real)

  
σ   3 Stress

(Real)

  
σ 12 Shear stress

(Real)

  
σ 23 Shear stress

(Real)

  
σ 31 Shear stress

(Real)

  
Eint Internal energy of solid element

(Real)

  
ρ Volumetric mass

(Real)

  

Comments

  1. The initial state for brick may be defined by more than one block.
  2. If Nb_integr > 1, the optional continuation lines must be repeated for each integration point, if Keyword2 = STRS_F and 8-node solid element with 1 or 8 integration point.

    Format Line 4; Format Line 5; Format Line 6

  3. If Nb_integr > 1, the optional continuation lines have to be repeated for each integration point, if Keyword2 = STRS_FGLO and 16-node or 20-node solid elements, 8-node HA8 elements, 8-node HSEPH elements, 6-node PA6 elements; 8-node HSEPH elements, 6-node PA6 elements, 10-nodes tetrahedron or Pentahedron 6 nodes.

    Format Line 3; Format Line 4; Format Line 5

  4. Using /INIBRI/STRS_F, you are assuming there is no density of the deformed elements. Before the first cycle, Radioss will check consistency of the input stress tensor with material data (stiffness and density):(1)
    D = s 11 + s 22 + s 33 3 − B u l k ⋅ ( 1 − ρ ρ 0 ) = 0 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 da9maalaaabaGaam4CamaaBaaaleaacaaIXaGaaGymaaqabaGccqGH RaWkcaWGZbWaaSbaaSqaaiaaikdacaaIYaaabeaakiabgUcaRiaado hadaWgaaWcbaGaaG4maiaaiodaaeqaaaGcbaGaaG4maaaacqGHsisl caWGcbGaamyDaiaadYgacaWGRbGaeyyXIC9aaeWaaeaacaaIXaGaey OeI0YaaSaaaeaacqaHbpGCaeaacqaHbpGCdaWgaaWcbaGaaGimaaqa baaaaaGccaGLOaGaayzkaaGaeyypa0JaaGimaaaa@5293@
    Where,
    ρ 0
    Density defined in the Starter file
    ρ
    Density in the state file
    If the stress is not fulfilled, then Radioss will correct the diagonal entry of the stress tensor: (2)
    σ i i n i t i a l = σ i i n p u t − D

    ( i MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbwvMCKf MBHbqefqvATv2CG4uz3bIuV1wyUbqedmvETj2BSbqefm0B1jxALjhi ov2DaebbnrfifHhDYfgasaacH8srps0lbbf9q8WrFfeuY=Hhbbf9v8 qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9 q8qqQ8frFve9Fve9Ff0dmeaacaGacmGadaWaaiqacaabaiaafaaake aacaWGPbaaaa@39C5@ =1,2,3)