Hi, everyone. I am working with a small boat model made of a sandwich structure. The boat is made of 3 composite materials and wood. I know that there is a macro in ansys to make the composites behave in a different way when they are under tensile or compressive loads. But my doubt is: how to make the macro work only for a single composite material? I am using the static structural
The macro is:
! Commands inserted into this file will be executed just prior to the ANSYS SOLVE command.
! These commands may supersede command settings set by Workbench.
/prep7
MP,DENS,1,2000, ! tonne mm^-3
MP,EX,1,3.3e09, ! tonne s^-2 mm^-1
MP,PRXY,1,0.39,
MP,DENS,2,2000, ! tonne mm^-3
MP,EX,2,1.7e09, ! tonne s^-2 mm^-1
MP,PRXY,2,0.39,
/solu
time,1.0
!finish
/solve
solve
finish
!bilinear
FINISH
! ***** BILINEAR MATERIAL EVALUATION MACRO *****
! MATERIAL 1 is the tension properties
! MATERIAL 2 is the compression properties
! ARG1 is the number of iterations (2 default)
! Macro is run after a static solution
/NOP
_niter = arg1 ! set number of iterations
*if,_niter,lt,2,then
_niter = 2
*endif
*do,_iter,1,_niter ! loop on number of iterations
/post1
set,1,1
!!ar11=elmiqr(0,14) ! get number of elements
esel,s,ename,,187
*get,ar11,elem,0,count
esel,all
*dim,_s1,,ar11 ! array for element s1
*dim,_s3,,ar11 ! array for element s3
etable,sigmax,s,1 ! s1 is in etable sigmax
etable,sigmin,s,3 ! s3 is in etable sigmin
*vget,_s1(1),elem,1,etab,sigmax ! get element maximum stress in s1
*vget,_s3(1),elem,1,etab,sigmin ! get element minimum stress in s3
*dim,_mask,,ar11 ! array for mask vector
*voper,_mask(1),_s1(1),lt,0 ! true if max stress < 0
*vcum,1 ! accumulate compression elements
*vabs,0,1 ! absolute value of s3
*voper,_mask(1),_s3(1),gt,_s1(1) ! true if abs(minstr) > maxstr
finish
/prep7 ! go to prep7 for element material mods
esel,s,ename,,187
mat,1 ! set all materials to tension properties
emod,all
*vput,_mask(1),elem,1,esel ! select compression elements
mat,2
esel,r,ename,,187 ! change selected elements to compression
emod,all
esel,all
!eall ! select all elements
finish
_s1(1)= ! cleanup vectors
_s3(1)=
_mask(1)=
allsel
/solve ! rerun the analysis
solve
finish
*enddo ! end of iterations
_niter= ! cleanup iteration counters
_iter=
/gop
!
!/post1
!plnst,s,x
!eplot
!/PNUM,MAT,1
!eplot
!mat,2
!emod,all
The macro is:
! Commands inserted into this file will be executed just prior to the ANSYS SOLVE command.
! These commands may supersede command settings set by Workbench.
/prep7
MP,DENS,1,2000, ! tonne mm^-3
MP,EX,1,3.3e09, ! tonne s^-2 mm^-1
MP,PRXY,1,0.39,
MP,DENS,2,2000, ! tonne mm^-3
MP,EX,2,1.7e09, ! tonne s^-2 mm^-1
MP,PRXY,2,0.39,
/solu
time,1.0
!finish
/solve
solve
finish
!bilinear
FINISH
! ***** BILINEAR MATERIAL EVALUATION MACRO *****
! MATERIAL 1 is the tension properties
! MATERIAL 2 is the compression properties
! ARG1 is the number of iterations (2 default)
! Macro is run after a static solution
/NOP
_niter = arg1 ! set number of iterations
*if,_niter,lt,2,then
_niter = 2
*endif
*do,_iter,1,_niter ! loop on number of iterations
/post1
set,1,1
!!ar11=elmiqr(0,14) ! get number of elements
esel,s,ename,,187
*get,ar11,elem,0,count
esel,all
*dim,_s1,,ar11 ! array for element s1
*dim,_s3,,ar11 ! array for element s3
etable,sigmax,s,1 ! s1 is in etable sigmax
etable,sigmin,s,3 ! s3 is in etable sigmin
*vget,_s1(1),elem,1,etab,sigmax ! get element maximum stress in s1
*vget,_s3(1),elem,1,etab,sigmin ! get element minimum stress in s3
*dim,_mask,,ar11 ! array for mask vector
*voper,_mask(1),_s1(1),lt,0 ! true if max stress < 0
*vcum,1 ! accumulate compression elements
*vabs,0,1 ! absolute value of s3
*voper,_mask(1),_s3(1),gt,_s1(1) ! true if abs(minstr) > maxstr
finish
/prep7 ! go to prep7 for element material mods
esel,s,ename,,187
mat,1 ! set all materials to tension properties
emod,all
*vput,_mask(1),elem,1,esel ! select compression elements
mat,2
esel,r,ename,,187 ! change selected elements to compression
emod,all
esel,all
!eall ! select all elements
finish
_s1(1)= ! cleanup vectors
_s3(1)=
_mask(1)=
allsel
/solve ! rerun the analysis
solve
finish
*enddo ! end of iterations
_niter= ! cleanup iteration counters
_iter=
/gop
!
!/post1
!plnst,s,x
!eplot
!/PNUM,MAT,1
!eplot
!mat,2
!emod,all