/ANIM/SHELL/DAMA
Engine Keyword Generates animation files containing a damage value for each layer of a shell element. The damage value is the maximum of damage over time of all failure criteria associated to the material.
Format
/ANIM/SHELL/DAMA/Keyword4/Keyword5
Definition
Field | Contents | SI Unit Example |
---|---|---|
Keyword4 | Output location:
|
|
Keyword5 | Result type or location:
|
Comments
- In case of
BATOZ shell element, the value is the average value of the Gauss points in the
layer.
This applies only to failure criteria defined with Failure Models keywords, failure defined inside material laws (/MAT/LAW52 (GURSON)) is currently not available.
- 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 layer is computed as the maximum value over the all integration points of its layer.
D(T)=maxt≤T(D(t)) - The damage value, D is 0 ≤ D ≤ 1. The status for
fracture is:
Free, if 0 ≤ D < 1
Failure, if D = 1
- D is
computed for every failure criteria as follows:
- Strain based failure (/FAIL/BIQUAD)D=∑Δεpεf
- Johnson-Cook failure (/FAIL/JOHNSON)
D=∑Δɛpɛf
- Tuler-Butcher failure (/FAIL/TBUTCHER)
D=t∫0(σ−σr)λdtK
- Wilkins failure (/FAIL/WILKINS)D=∫W1W2dεpDf
- FLD failure (/FAIL/FLD)
D=Maxtime(εmajorεlim)
Where,- εlim
- Major strain as limit from FLD function
- BAO-XUE-Wierzbicki failure (/FAIL/WIERZBICKI)D=∑Δεpˉεf
- Strain failure model (/FAIL/TENSSTRAIN)D=Maxtime(ɛ1−ɛt1ɛt2−ɛt1)
- Strain failure model (/FAIL/FABRIC)D=Max(ε1−εf1εr1−εf1,ε2−εf2εr2−εf2)
- Energy density failure model (/FAIL/ENERGY):D=Maxtime(E−E1E2−E1)
- Chang failure (/FAIL/CHANG)
The maximum damage for different failure mode:
D=Max(ef2,ec2,em2,ed2) - Hashin Composite failure (/FAIL/HASHIN)
The maximum damage for different failure mode
For uni-directional lamina model:
D=Max(F1,F2,F3,F4,F5)For fabric lamina model:
D=Max(F1,F2,F3,F4,F5,F6,F7) - Puck Composite failure (/FAIL/PUCK)
The maximum damage for different failure mode:
D=Max(ef(tensile),ef(compression),ef(ModeA),ef(ModeB),ef(ModeC)) - Ladeveze failure (/FAIL/LAD_DAMA)
Only used for Plyxfem in /PROP/TYPE17:
˙d=ka[1−exp(−a〈w(Y)−d〉)] - Strain Failure Model with dependence on Lode angle (/FAIL/TAB1)D=∑ΔDDcrit
- NXT Failure Model (/FAIL/NXT)D=λf2
- Strain based Ductile Failure Model (/FAIL/HC_DSSE)D=∑ΔˉεpˉεprHC(η)
- Strain based failure (/FAIL/BIQUAD)
- This
option is available only if Keyword4 = N (for
each defined layer N allows to compute shell damage value within
each integration point NIP of layer N). This
option is only available for /PROP/TYPE51 and
PCOMPP (/PROP/TYPE51 or
/PROP/PCOMPP with multiple integration points through each
layer).
Nevertheless, Keyword4=ALL combined with Keyword5=ALL is allowed.