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Assigning multilayered sections to areas

Assigning multilayered sections to areas

Assigning multilayered sections to areas

(OP)
Hello all!


A question on commands like AATT. I'm trying to make a multilayered shell281 structure with different materials in each layer with contact and target elements. The tricky part is that one layer is not uniform in thickness but is more of a sinusoidal block function, so I've split the structure into different sections, so section 1 is e.g. 4 layers and section 2 e.g. 5 layers in an alternating sequence. To accomplish this, I make all the areas of section 1 in the positions of the structure and attach it to section 1 properties using AATT, and do similarly with section 2, to create the shell structure. The problem is that when I display the structure, it displays the correct geometry but it thinks that the entire layered structure is material 1, instead of a layered structure consisting of material 1,2,3,4,etc.

The bulk of the code that is related to this is:
Real set 1 contains t_bulk, t_eutec, t_bsf, t_Si, t_ag and the parameters that correspond to MAT are defined earlier


eshell = 1

TYPE, eshell
REAL, 1
SECTYPE,1,SHELL
SECOFFSET, BOT
SECDATA,t_bulk,al_bulk,,,aluminium_bulk
SECDATA,t_eutec,al_eutec,,,aluminium_eutec
SECDATA,t_bsf,al_bsf,,,aluminium_bsf
SECDATA,t_Si,si_isotropic,,,silicon

RECTNG,w_ag/2,2/3*l/2-w_ag/2,0,b/2
RECTNG,2/3*l/2+w_ag/2,l/2,0,b/2
ASEL, S,AREA,,1,2
!AATT, MAT, REAL, TYPE, ESYS, SECN
AATT,,1,SHELL,,1

!! reference silver busbars as separate shell section so that
!! only thickness of busbars varies with position,
!! instead of entire multilayer structure
REAL, 2
SECTYPE, 2, SHELL
SECOFFSET, BOT
SECDATA,t_bulk,al_bulk,,,aluminium_bulk
SECDATA,t_eutec,al_eutec,,,aluminium_eutec
SECDATA,t_bsf,al_bsf,,,aluminium_bsf
SECDATA,t_Si,si_isotropic,,,silicon
SECDATA, t_ag,silver,,,silver

RECTNG,0,w_ag/2,0,b/2
RECTNG,2/3*l/2-w_ag/2,2/3*l/2+w_ag/2,0,b/2
ASEL, S,AREA,,3,4
AATT,,2,SHELL,,2
alls

Any tips or suggestions about how to fix this would be helpful. Thanks!

RE: Assigning multilayered sections to areas

(OP)
This might be a simpler set up to debug-considering just one kind of section and assigning it to the formed area before meshing :



TYPE, 1
REAL, 1
SECTYPE,1,SHELL
SECOFFSET, BOT
SECDATA,t_bulk,al_bulk,,,aluminium_bulk
SECDATA,t_eutec,al_eutec,,,aluminium_eutec
SECDATA,t_bsf,al_bsf,,,aluminium_bsf
SECDATA,t_Si,si_isotropic,,,silicon

RECTNG,0,l/2,0,b/2
ASEL, S, AREA,,1
!AATT, MAT, REAL, TYPE, ESYS, SECN
AATT, ,1,SHELL,11,1 !<--what should go here?

RE: Assigning multilayered sections to areas

(OP)
Nevermind, I got it to work!


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