/DRAPE (New!)

Block Format Keyword

/DRAPE – Define Fiber Orientation Change and Thinning for a Ply, due to draping

Description

This option is used to read fiber orientation changes and thinning for a ply which are usually the result a manufacturing process simulation.

The input is given by any number of lines.

Each line defines the angle change and the thinning for either a single element or a group.

Each element of the ply can only be called once for a single DRAPE option.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/DRAPE/drape_ID
drape_title
Entity	Entity_ID	Thinning		θdrape

Field	Contents	SI Unit Example
drape_ID	Drape identifier (Integer, maximum 10 digits)
drape_title	Drape title (Character, maximum 100 characters)
Entity	Must be left justified. (Integer) SHELL: The entity is a 4 nodes shell element SH3N: The entity is a 3 nodes shell element GRSHEL: The entity is a group of 4 nodes shell element GRSH3N: The entity is a group of 3 nodes shell element
Entity_ID	Entity identifier (Integer)
Thinning	Ply thinning factor (Real)
θdrape	Ply orientation change (Real)

1.	The drape is used in /PLY and /PROP/PLY to take into account the manufacturing process on the ply orientation and thickness of the elements.

2.	For each shell element, the ply first orthotropy direction is rotated by an angle θdrape in addition to the angles defined in the /PROP/PLY and /PLY or in the shell definition (depending of the value of flag def_orth in the ply input):

If def_orth = 2, the angle for between the reference direction and the first direction of orthotropy is:

Where, is defined in the /STACK or /PROP/STACK for ply layer i and is the angle of rotation of the layer with respect to the shell defined in the /PLY or /PROP/PLY option.

drape_def_orth_option

If def_orth = 1, the angle between the shell skew and the first direction of orthotropy is:

Where, is defined in the shell (/SHELL or /SH3N) and is the angle of rotation of the layer with respect to the shell, defined in the /PLY or /PROP/PLY option. See ply example in /PROP/TYPE17.

If def_orth =1, skew_ID, VX, VY, and VZ from the /PROP/TYPE17, /PROP/TYPE51 and /STACK input are ignored.

3.	The ply thickness ti of the element as defined in the ply is scaled using the ply thinning factor Thinning.