/ANIM/SHELL/IDPLY/DAMA

Engine Keyword Generates animation files containing damage values for shell elements that use ply based composite properties, /PROP/STACK (TYPE17), /PROP/TYPE51, or /PCOMPP. The damage value is the maximum of damage over time and of all failure criteria associated to the material.

Format

/ANIM/SHELL/IDPLY/DAMA/Keyword5/Keyword6

Definitions

Field Contents SI Unit Example
Keyword5 Ply output. 1 2
I
Ply ID number
Integration point, Keyword6=J, must also be entered.
ALL
All the integration point results of all the plies are output.
 
Keyword6 Output location. Only used if Keyword5=I is entered.
J
j’th integration point of the Ply I
 

Comments

  1. Ply ID number is prop_ID from /PROP/TYPE19 (PLY)/prop_ID or ply_ID from /PLY/ply_ID.
  2. For fully integrated BATOZ shells, Ishell=12, the value output is the maximum value of the in-plane Gauss points for a particular through the thickness integration point.
  3. This applies only to failure criteria defined with /FAIL keywords. Failure defined inside material laws (/MAT/GURSON) is currently not available.
  4. The damage value, D is the maximum value of all failure criteria of the model. The damage value which is displayed is the maximum damage value over time.

    In case of composite shell element property TYPE51, the damage value for one ply is computed as the maximum value over the all integration points of its ply.

    (1)
    D ( T ) = max t T ( D ( t ) )
  5. The damage value, D is 0 ≤ D ≤ 1. The status for fracture is:

    Free, if 0 ≤ D < 1

    Failure, if D = 1

  6. D is computed for every failure criteria as follows:
    • Strain based failure (/FAIL/BIQUAD)(2)
      D = Δ ε p ε f
    • Johnson-Cook failure (/FAIL/JOHNSON) (3)
      D = Δ ɛ p ɛ f
    • Tuler-Butcher failure (/FAIL/TBUTCHER) (4)
      D = 0 t ( σ σ r ) λ d t K
    • Wilkins failure (/FAIL/WILKINS)(5)
      D = W 1 W 2 d ε p D f
    • FLD failure (/FAIL/FLD) (6)
      D = M a x t i m e ( ε m a j o r ε lim )
    Where,
    ε lim
    Strain limit from FLD function

    anim_shell_dam_fld2
    Figure 1.
    • BAO-XUE-Wierzbicki failure (/FAIL/WIERZBICKI)(7)
      D = Δ ε p ε ¯ f
    • Strain failure model (/FAIL/TENSSTRAIN)(8)
      D = Max time ( ɛ 1 ɛ t 1 ɛ t 2 ɛ t 1 )
    • Strain failure model (/FAIL/FABRIC)(9)
      D = M a x ( ε 1 ε f 1 ε r 1 ε f 1 , ε 2 ε f 2 ε r 2 ε f 2 ) MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqGqFfpeea0xe9vq=Jb9 vqpeea0xd9q8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr 0=vr0db8meaabaqaciGacaGaaeqabaWaaeaaeaaakeaacaWGebGaey ypa0JaamytaiaadggacaWG4bWaaeWaaeaadaWcaaqaaiabew7aLnaa BaaaleaacaaIXaaabeaakiabgkHiTiabew7aLnaaBaaaleaacaWGMb GaaGymaaqabaaakeaacqaH1oqzdaWgaaWcbaGaamOCaiaaigdaaeqa aOGaeyOeI0IaeqyTdu2aaSbaaSqaaiaadAgacaaIXaaabeaaaaGcca GGSaWaaSaaaeaacqaH1oqzdaWgaaWcbaGaaGOmaaqabaGccqGHsisl cqaH1oqzdaWgaaWcbaGaamOzaiaaikdaaeqaaaGcbaGaeqyTdu2aaS baaSqaaiaadkhacaaIYaaabeaakiabgkHiTiabew7aLnaaBaaaleaa caWGMbGaaGOmaaqabaaaaaGccaGLOaGaayzkaaaaaa@5C57@
    • Energy density failure model (/FAIL/ENERGY):(10)
      D = Max time ( E E 1 E 2 E 1 )
    • Chang failure (/FAIL/CHANG)
      The maximum damage for different failure mode: (11)
      D = Max ( e f 2 , e c 2 , e m 2 , e d 2 )
    • Hashin Composite failure (/FAIL/HASHIN)

      The maximum damage for different failure mode

      For uni-directional lamina model:(12)
      D = M a x ( F 1 , F 2 , F 3 , F 4 , F 5 ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 da9iaad2eacaWGHbGaamiEamaabmaabaGaamOramaaBaaaleaacaaI XaaabeaakiaacYcacaWGgbWaaSbaaSqaaiaaikdaaeqaaOGaaiilai aadAeadaWgaaWcbaGaaG4maaqabaGccaGGSaGaamOramaaBaaaleaa caaI0aaabeaakiaacYcacaWGgbWaaSbaaSqaaiaaiwdaaeqaaaGcca GLOaGaayzkaaaaaa@4779@
      For fabric lamina model:(13)
      D = M a x ( F 1 , F 2 , F 3 , F 4 , F 5 , F 6 , F 7 ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 da9iaad2eacaWGHbGaamiEamaabmaabaGaamOramaaBaaaleaacaaI XaaabeaakiaacYcacaWGgbWaaSbaaSqaaiaaikdaaeqaaOGaaiilai aadAeadaWgaaWcbaGaaG4maaqabaGccaGGSaGaamOramaaBaaaleaa caaI0aaabeaakiaacYcacaWGgbWaaSbaaSqaaiaaiwdaaeqaaOGaai ilaiaadAeadaWgaaWcbaGaaGOnaaqabaGccaGGSaGaamOramaaBaaa leaacaaI3aaabeaaaOGaayjkaiaawMcaaaaa@4C5C@
    • Puck Composite failure (/FAIL/PUCK)
      The maximum damage for different failure mode:(14)
      D = Max ( e f ( tensile ) , e f ( compression ) , e f ( ModeA ) , e f ( ModeB ) , e f ( ModeC ) )
    • Strain Failure Model with dependence on Lode angle (/FAIL/TAB1)(15)
      D = Δ D D c r i t
    • NXT Failure Model (/FAIL/NXT)(16)
      D = λ f 2