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/PLY

Block Format Keyword This option is used to define plies made of 4-node and 3-node shell elements with /PROP/PCOMPP.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/PLY/ply_ID/unit_ID
ply_title
mat_ID t Δϕ grsh4n_ID grsh3n_ID Npt_ply αi
Optional line
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
drape_ID def_orth            

Definition

Field Contents SI Unit Example
ply_ID Ply identifier

(Integer, maximum 10 digits)

 
unit_ID Unit Identifier

(Integer, maximum 10 digits)

 
ply_title Ply title

(Character, maximum 100 characters)

 
mat_ID Material identifier for ply

(Integer)

 
t Thickness of ply

(Real)

[m]
Δϕ Incremental angle for ply

(Real)

[deg]
grsh4n_ID Shell 4-nodes group identifier connected to Ply

(Integer, maximum 10 digits)

 
grsh3n_ID Shell 3-nodes group identifier connected to Ply

(Integer, maximum 10 digits)

 
Npt_ply Number of integration points through ply thickness with, 1 ≤ Npt_ply ≤ 10
= 1 (Default)

(Integer)

 
αi Angle between first and second material direction for ply i .

Default = 90.0 (Real)

[deg]
drape_ID Optional: Drape identifier. 6

(Integer)

 
def_orth Optional: Orthotropy angle. 5
= 1
The orthotropy angle is calculated using the angle ϕ s defined in /SHELL and /SH3N.
= 2 (Default)
The orthotropy angle is calculated using the skew and rotation defined in /STACK option..

(Integer)

 

Comments

  1. The ply option is used in combination with /STACK and /PROP/PCOMPP to create ply-based sandwich composite properties. See Example (Substack with /DRAPE) in /STACK.
  2. All elements defined in the ply must use the /PROP/PCOMPP property. The compatibility to material law of this option is similar to /STACK.
  3. The ply can be attached to a group of shell element (4 or 3 node shell or both).
  4. If both the grsh4n_ID and the grsh3n_ID are 0, the ply is void (no element).
  5. The orthotropy angle in
    • Orthotropy angle defined without def_orth and drape_ID in optional line
      The angle for ply i (in /STACK)(1)
      ϕ=ϕi+Δϕ

      Where, ϕi is defined in /STACK.

    • Orthotropy angle defined with def_orth and drape_ID in optional line
      • If def_orth = 2, the angle between the reference direction and the first direction of orthotropy is:(2)
        ϕ=ϕi+Δϕ+θdrape

        Where, θdrape is the angle increment defined in the drape option drape_ID (if any) and ϕi is defined in /STACK for ply.

      • If def_orth = 1, the angle between the shell skew and the first direction of orthotropy is:(3)
        ϕ=ϕs+Δϕ+θdrape

        Where, θdrape is the angle increment defined in the drape option drape_ID (if any) and ϕs is defined in the shell (/SHELL or /SH3N).

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

  6. If drape_IDis defined, the angle of each element defined in the drape is incremented by the value defined for this element θdrape and the thickness is modified according to the thinning for this element (/DRAPE).