/H3D/SHELL

Format

/H3D/SHELL/Keyword3/Keyword4/Keyword5

#optional next line(s) that lists the parts to save results for.

part_ID₁ ... part_ID_N

Definition

Examples

/H3D/SHELL/TENS/STRESS/PLY=1/NPT=ALL
/H3D/SHELL/TENS/STRESS/NPT=ALL/PLY=1

/H3D/SHELL/TENS/STRESS/NPT=ALL

/H3D/SHELL/ENER
356 293

/H3D/SHELL/USER/NPT=ALL/UVAR=12

Comments

1. The syntax /H3D/ELEM/Keyword3/Keyword4/Keyword5 is also valid.
2. When PART IDs are listed after the /H3D/SHELL line the specified results will output only for those parts.
3. The output location in Keyword4 and Keyword5 can be defined via:

   NPT

   Integration points for properties /PROP/TYPE1 (SHELL), /PROP/TYPE9 (SH_ORTH), /PROP/TYPE19 (PLY) or /PLY.

   LAYER

   Composite shell layer when using /PROP/TYPE11 (SH_SANDW), /PROP/TYPE10 (SH_COMP), /PROP/TYPE16 (SH_FABR).

   PLY

   Composite shell ply when using, /PROP/TYPE19 (PLY) or /PLY.

   MEMB

   Generalized membrane stresses per element. Cannot be used with NPT, LAYER or PLY options.

   BEND

   Generalized bending stresses per element. Cannot be used with NPT, LAYER or PLY options.

4. Output can be requested for a specific location number (I), ALL, and in some case UPPER or LOWER. The output locations are separated by a / and can be in any order.
5. The values of FLD damage factor is equal to the ratio of the actual major principal strain value over the forming limit curve value:
   $$FLDF=\frac{{\epsilon }_{major}}{{\epsilon }_{\lim }}$$

   Where, ${\epsilon }_{\lim }$ is the major principal strain at failure limit from FLD diagram (fct_ID in /FAIL/FLD).

   The FLD compares the ${\epsilon }_{major}$ and ${\epsilon }_{\lim }$ using the same ${\epsilon }_{minor}$ .

   
   
   

   FLDF may be greater than 1, if the option /FAIL/FLD, Ifail_sh=4 is used. In this case, the damage factor is only calculated for post-processing and no elements are deleted.

6. The values of FLD zone index are defined as:

   FLDZ=6

   Failure

   ${\epsilon }_{major}>{\epsilon }_{\lim }$

   FLDZ=5

   Marginal

   ${\epsilon }_{\lim }>{\epsilon }_{major}>{\epsilon }_{m\arg inal}$

   FLDZ=4

   Safe

   ${\epsilon }_{m\arg inal}>{\epsilon }_{major}>\left|{\epsilon }_{minor}\right|$

   FLDZ=3

   Compression

   $-{\epsilon }_{minor}>{\epsilon }_{major}>-{\epsilon }_{minor}\cdot \frac{R_{ani}}{1+R_{ani}}$

   FLDZ=2

   High wrinkle

   $-{\epsilon }_{minor}\cdot \frac{R_{ani}}{1+R_{ani}}>{\epsilon }_{major}$

   FLDZ=1

   Loose metal

   ${\epsilon }_{major}{}^2+{\epsilon }_{minor}{}^2>Factor\_Loosemeta{l}^2$

   
   
   

   Where,

   fct_ID

   Defined in /FAIL/FLD

   ${\epsilon }_{\lim }$

   Major strain as a limit from FLD diagram from fct_ID in /FAIL/FLD

   ${\epsilon }_{minor}$ and ${\epsilon }_{major}$

   The minimum and maximum principal strains

   R_ani

   Average anisotropy factor defined in FLD input in /FAIL/FLD

   $Factor\_Marginal$

   Defined in FLD input in /FAIL/FLD

   $Factor\_Loosemetal$

   Defined in FLD input in /FAIL/FLD

   $$\alpha =\arctan \left(-\frac{R_{ani}}{1+R_{ani}}\right)$$

   I_marg

   Defined in FLD input in /FAIL/FLD

   If I_marg = 2, the marginal curve is defined by shifting the FLD curve with the constant value $Factor\_Marginal$ .

   $${\epsilon }_{m\arg inal}={\epsilon }_{\lim }-Factor\_Marginal$$

   If I_marg = 3, the marginal curve is defined as a factor of the $Factor\_Marginal$ .

   $${\epsilon }_{m\arg inal}={\epsilon }_{\lim }\left(1-Factor\_Marginal\right)$$

7. Option DAMG is only used with coupled damage models (such as /MAT/LAW72 or /FAIL/GURSON) to output damage over integration points. The damage variable is normalized by its critical value to get values between 0 and 1. For instance:
   • For /MAT/LAW72
     $$D_{mg}=\frac{D}{D_C}$$
   • For /FAIL/GURSON
     $$D_{mg}=\frac{f_t}{f_F}$$
8. When using global integration (N=0 in the shell property), Radioss always outputs the stress and strain only in the midplane (MEMB).
9. If /NONLOCAL/MAT option is activated, it is possible to output the regularized non-local plastic strain and its rate.
10. The damage initiation variable /H3D/SHELL/DAMINI is used with some failure criteria such as /FAIL/INIEVO, which first computes a damage initiation criterion before computing the stress softening damage variable, which can be plotted with /H3D/SHELL/DAMA.
11. For HC_DSSE_F, the value of HC_DSSE damage factor is equal to the ratio of the actual plastic strain value over the plastic strain at failure curve value:
    $$HC\_DSSE\_F = \frac{{\epsilon }_p}{{\epsilon }_{HC}^{pr}}$$
    Where, ${\overline{\epsilon }}_{HC}^{pr}$ is the plastic strain at failure defined by Hosford-Coulomb curve (see /FAIL/HC_DSSE).

    
    
    

12. For HC_DSSE_Z, the value of HC_DSSE zone index are defined as:

    HC_DSSE_Z = 1 (Safe)

    Below HC and DSSE curves

    HC_DSSE_Z = 2 (Necking)

    Above DSSE curves and below HC curve

    HC_DSSE_Z = 3 (Failure)

    Above DSSE and HC curves

13. For failure criteria using different modes (mainly for composites), such as /FAIL/HASHIN, /FAIL/CHANG, and so on, these different modes can be output using the /H3D/SHELL/FAILURE option with the keyword MODE. You can choose to plot a specific mode using its number I (refer to the failure criterion documentation for mode number details), or all modes with ALL. The option MODE can be combined with PLY, LAYER and NPT output keywords.