/DCOMP

Optimization Keyword Defines manufacturing constraints for composite sizing optimization.

Format

(1)	(2)	(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`

Definitions

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

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

Figure 2.

Figure 3.

Figure 4.

Figure 5.