/DCOMP

Optimization Keyword Defines manufacturing constraints for composite sizing optimization.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/DCOMP/dcomp_ID
title
grpart_ID                  
CTYP=1:
CTYP LTMIN LTMAX grsh3n_ID grshel_ID LTEXC    
CTYP=2:
CTYP PTANGLE PTMIN PTMAX grsh3n_ID grshel_ID PTEXC
CTYP=3:
CTYP PPANGLE PPMIN PPMAX grsh3n_ID grshel_ID PPEXC
CTYP=4:
CTYP BANGLE1 BANGLE2        
CTYP=5:
CTYP CANGLE CTHICK        
CTYP=6:
CTYP PDANGLE PDTYP PDMAX grsh3n_ID grshel_ID PDEXC  

Definition

Field Contents SI Unit Example
dcomp_ID Manufacturing constraints for composite sizing optimization identifier

(Integer > 0)

 
title Title

(Character, maximum 100 characters)

 
grpart_ID Part group identifier defining the design space.

(Integer > 0)

 
COMP Composite manufacturing constraints applied are indicated. Indicates that information about manufacturing constraints is to follow. The value of COMP is equal to the total number of composite manufacturing definitions that follow.  
CTYP Composite manufacturing type definition flag.
= 1
Laminate thickness constraints are applied. Multiple laminate thickness constraints are allowed.
= 2
Ply thickness constraints are applied. Multiple ply thickness constraints are allowed.
= 3
Ply thickness percentage constraints are applied. Multiple ply thickness percentage constraints are allowed.
= 4
A balance constraint is applied. Multiple balance constraints are allowed.
= 5
A constant thickness constraint is applied. Multiple constant thickness constraints are allowed.
= 6
Ply drop-off constraints are applied. Multiple ply drop-off constraints are allowed.

(Integer)

 
LTMIN Minimum laminate thickness for the laminate thickness constraint (CTYP=1).

(Real or blank)

 
LTMAX Maximum laminate thickness for the laminate thickness constraint (CTYP=1).

(Real or blank)

 
grsh3n_ID 3-node shell group identifier

(Integer > 0)

 
grshel_ID 4-node shell group identifier

(Integer > 0)

 
LTEXC Indicates that certain plies are excluded from the laminate thickness constraint (CTYP=1). Supported options are:
= 0
Plies are not excluded.
= 1 (Default)
The core is excluded.
= 2
Plies defined in the constant thickness constraint (CTYP = 5) are excluded.
= 3
1 and 2 are considered.

(Integer)

 
PTANGLE Ply orientation in degrees to which the ply thickness constraint (CTYP=2) is applied.

(Real)

 
PTMIN Minimum thickness for the ply thickness constraint (CTYP=2).

(Real or blank)

 
PTMAX Maximum thickness for the ply thickness constraint (CTYP=2).

(Real or blank)

 
PTEXC Indicates that certain plies are excluded from the ply thickness constraint (CTYP=2). Supported options are:
= 0
Plies are not excluded.
= 1 (Default)
The core is excluded.
= 2
Plies defined in the constant thickness constraint (CTYP = 5) are excluded.
= 3
1 and 2 are considered.

(Integer)

 
PPANGLE Ply orientation in degrees to which the ply thickness percentage constraint is applied (CTYP=3).

(Real)

 
PPMIN Minimum percentage thickness for the ply thickness percentage constraint (CTYP=3).

(Real or blank)

 
PPMAX Maximum percentage thickness for the ply thickness percentage constraint (CTYP=3).

(Real or blank)

 
PPEXC Indicates that certain plies are excluded from the ply thickness percentage constraint (CTYP=3). Supported options are:
= 0
Plies are not excluded.
= 1 (Default)
The core is excluded.
= 2
Plies defined in the constant thickness constraint (CTYP = 6) are excluded.
= 3
1 and 2 are considered.

(Integer)

 
BANGLE1 First ply orientation in degrees to which the balance constraint is applied (CTYP=4).

(Real)

 
BANGLE2 Second ply orientation in degrees to which the balance constraint is applied (CTYP=4).

(Real)

 
CANGLE Ply orientation in degrees to which the constant thickness constraint is applied (CTYP=5).

(Real)

 
CTHICK Constant ply thickness for the constant thickness constraint (CTYP=5).

(Real)

 
PDANGLE Ply orientation in degrees to which the ply drop-off constraint is applied (CTYP=6).

(Real)

 
PDTYP Drop-off constraint types. 1
= 2
TOTSLP
= 3
TOTDRP

(Integer)

 
PDMAX Maximum allowed drop-off for the ply drop-off constraint (CTYP=6).

(Real)

 
PDEXC Indicates that certain plies are excluded from the ply drop-off constraint (CTYP=6). Supported options are:
= 0
Plies are not excluded.
= 1 (Default)
The core is excluded.
= 2
Plies defined in the constant thickness constraint (CTYP = 5) are excluded.
= 3
1 and 2 are considered.

(Integer)

 

Example

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/DCOMP/1
dcomp example
# grpartID 
         1
#   CTYP=1               PPMIN               PPMAX 
         1                 0.2                 2.5
#   CTYP=5             BANGLE1             BANGLE2 
         5               -45.0                45.0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

Comments

  1. The option for selecting the type of drop-off constraints for PDTYP is defined for a set of plies.
    The PDTYP options are:
    • TOTSLP
    • TOTDRP

      dcomp_stacked_plies
      Figure 1.
    Assuming that the plies are stacked as Figure 1, the following definition is:

    dcomp_plyslp
    Figure 2.

    dcomp_plydrp
    Figure 3.

    dcomp_totslp
    Figure 4.

    dcomp_totdrp
    Figure 5.