Element direction in LS-Prepost

- June 16, 2023 at 9:11 pm
  
  mrijal
  Subscriber
  
  Hello,
  I am modelling wave propagation in 2D orthotropic shell elements. I am having some issues in figuring out the element direction. I get different element direction when I use (a) ElementTool-- Elemen Edit--Direction and (b) ElementTool--Identify--Element--Shell--Element Direction. I have also attcahed a figure showing element direction as given by both options and I am not sure which direction the solver uses. Any help regarding the issue would be highly appreciated.
  Manoj Rijal
- June 16, 2023 at 10:38 pm
  
  Andreas Koutras
  Ansys Employee
  
  Hello,
  Could you please copy in the thread the following keywords from your model. Thank you!
  *NODE
  *ELEMENT
  *PART
  *MAT
  *SECTION
- June 19, 2023 at 2:39 pm
  
  mrijal
  Subscriber
  
  Hello,
  Thanks for the response. The model has many elements. All info would be too big. I have only included nodes and elements seen in figure. The model is composite with orthotropic properties. Red layer is 90 and brown is 0 degree oriented.Here is the info you requested. Please let me know if you need more info.
  *NODE
  $# nid x y z tc rc
  39969 4.993751 0.05625 0.0 0 0
  39970 4.993751 0.059375 0.0 0 0
  39971 4.993751 0.0625 0.0 0 0
  39972 4.993751 0.065625 0.0 0 0
  39973 4.99375 0.06875 0.0 0 0
  39994 4.996875 0.05625 0.0 0 0
  39995 4.996875 0.059375 0.0 0 0
  39996 4.996875 0.0625 0.0 0 0
  39998 4.996875 0.06875 0.0 0 0
  39997 4.996875 0.065625 0.0 0 0
  
  *ELEMENT_SHELL
  $# eid pid n1 n2 n3 n4 n5 n6 n7 n8
  38371 10 39969 39994 39995 39970 0 0 0 0
  38372 10 39970 39995 39996 39971 0 0 0 0
  *ELEMENT_SHELL_BETA
  $# eid pid n1 n2 n3 n4 n5 n6 n7 n8
  38373 11 39971 39996 39997 39972 0 0 0 0
  $# thic1 thic2 thic3 thic4 beta
  0.0 0.0 0.0 0.0 90.0
  38374 11 39972 39997 39998 39973 0 0 0 0
  0.0 0.0 0.0 0.0 90.0
  *PART
  $# title
  0_Laminate_10
  $# pid secid mid eosid hgid grav adpopt tmid
  10 1 1 0 0 0 0 0
  *PART
  $# title
  90_Laminate_11
  $# pid secid mid eosid hgid grav adpopt tmid
  11 1 2 0 0 0 0 0
  *MAT_ORTHOTROPIC_ELASTIC_TITLE
  0laminate
  $# mid ro ea eb ec prba prca prcb
  11.46000E-42.090000E7 1389000 1389000 0.0214 0.0214 0.55
  $# gab gbc gca aopt g sigf
  6940000 448200.0 6940000 0.0 0.0 0.0
  $# xp yp zp a1 a2 a3 macf ihis
  0.0 0.0 0.0 0.0 0.0 0.0 4 0
  $# v1 v2 v3 d1 d2 d3 beta ref
  0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
  *MAT_ORTHOTROPIC_ELASTIC_TITLE
  90laminate
  $# mid ro ea eb ec prba prca prcb
  21.46000E-42.090000E7 1389000 1389000 0.0214 0.0214 0.55
  $# gab gbc gca aopt g sigf
  6940000 448200.0 6940000 0.0 0.0 0.0
  $# xp yp zp a1 a2 a3 macf ihis
  0.0 0.0 0.0 0.0 0.0 0.0 3 0
  $# v1 v2 v3 d1 d2 d3 beta ref
  0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
  *SECTION_SHELL_TITLE
  Shell_Comp
  $# secid elform shrf nip propt qr/irid icomp setyp
  1 13 1.0 4 1.0 -1 0 1
  $# t1 t2 t3 t4 nloc marea idof edgset
  0.5 0.5 0.5 0.5 0.0 0.0 0.0 0
- June 20, 2023 at 12:10 am
  
  Andreas Koutras
  Ansys Employee
  
  Hello,
  Thanks for sharing your input.
  In Element Tools > Identify,
  Elem Dir: shows the element N1 -> N2 direction.
  Mat Dir: shows the material direction orthotropy (defined by the AOPT, BETA, etc parameters).
  
  In Element Tools > Element Editing, the Direction option sets the direction of orthotropy axis 1 of the material.
- June 20, 2023 at 10:13 am
  
  mrijal
  Subscriber
  
  @Andreas Thank you. It really helped.