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Maxcheck.f90
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Maxcheck.f90
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Subroutine Maxcheck(t,ntime)
!Subroutine to calculate the maximum stresses the boddy experiences
implicit none
integer NN, ntime, i ,j, aa, asp_pos, t, floor, b, aai
real*8 s1, sx, sy, sz, txy, txz, tyz, n_x, n_y, n_z
save /Max_val_asp/
save /Max_val_cont/
save /tau_max_values/
save /directions/
include 'inc_Grid.h'
include 'inc_StressParam.h'
include 'inc_Stress_surf.h'
include 'inc_Stress_under.h'
include 'inc_tau_max_values.h'
include 'inc_Prin_Stress_surf.h'
include 'inc_Prin_Stress_under.h'
include 'inc_Max_val_asp.h'
include 'inc_Max_val_cont.h'
include 'inc_CurrentP.h'
include 'inc_directions.h'
NN=(NY+1)/2
asp_pos=NINT(1.0+Nx-(1.0*Nx)/Ntime*t) ! The contact moves from the +side of the asperity to the - side.
if (asp_pos .lt. 1) asp_pos=1
aa=asp_pos
b=asp_pos+Nx-1;
if (b .gt. 2*Nx) b=2*Nx
!Contact view
if (t .EQ. 0) then
sig_1m = sig_1 ! Under neeth surface principal stress 1
sig_1ms = sig_1s ! Surface principal stress 1
sig_vmm = sig_vm ! Under neeth surface von Mises stress
sig_vmms = sig_vms ! Surface von Mises stress
sig_xm = sig_x
sig_xms = sig_xs
sig_ym = sig_y
sig_yms = sig_ys
sig_zm = sig_z
sig_zms = sig_zs
else
do i=1,NX
do j=1,NN
! storing the maximum values at each node on the surface
sig_1ms(i,j) =max(sig_1ms(i,j), sig_1s(i,j))
sig_vmms(i,j) =max(sig_vmms(i,j), sig_vms(i,j))
sig_xms(i,j) =max(sig_xms(i,j), sig_xs(i,j))
sig_yms(i,j) =max(sig_yms(i,j), sig_ys(i,j))
sig_zms(i,j) =max(sig_zms(i,j), sig_zs(i,j))
enddo
do j=1,NZ
! storing the maximum values at each node underneeth
sig_1m(i,j) = max(sig_1m(i,j), sig_1(i,j))
sig_vmm(i,j) = max(sig_vmm(i,j), sig_vm(i,j))
sig_xm(i,j) = max(sig_xm(i,j), sig_x(i,j))
sig_ym(i,j) = max(sig_ym(i,j), sig_y(i,j))
sig_zm(i,j) = max(sig_zm(i,j), sig_z(i,j))
enddo
enddo
endif
!asperity wiev
if (t .EQ. 0) then
!initiating P and sig_vm as zero becouse they can not have negative values
P_asp=0
sig_vmma=0
sig_vmmsa=0
tau_max_a=0
tau_max_as=0
! Sigma_1 can have negative values
do i=1,Nx
do j=1,NN
sig_1msa(aa+i-1,j) = sig_1s(i,j)
s1 = sig_1s(i,j)
sx = sig_xs(i,j)
sy = sig_ys(i,j)
sz = sig_zs(i,j)
txy = tau_xys(i,j)
txz = tau_xzs(i,j)
tyz = tau_yzs(i,j)
Call s1_direction(s1, sx, sy, sz, txy, txz, tyz, n_x, n_y, n_z)
nx_s(aa+i-1,j) =N_x
ny_s(aa+i-1,j) =N_y
nz_s(aa+i-1,j) =N_z
sig_xmsa(aa+i-1,j) = sig_xs(i,j)
sig_ymsa(aa+i-1,j) = sig_ys(i,j)
sig_zmsa(aa+i-1,j) = sig_zs(i,j)
enddo
do j=1, NZ
s1 = sig_1(i,j)
sx = sig_x(i,j)
sy = sig_y(i,j)
sz = sig_z(i,j)
txy = tau_xy(i,j)
txz = tau_xz(i,j)
tyz = tau_yz(i,j)
Call s1_direction(s1, sx, sy, sz, txy, txz, tyz, n_x, n_y, n_z)
nx_d(aa+i-1,j) =N_x
ny_d(aa+i-1,j) =N_y
nz_d(aa+i-1,j) =N_z
sig_1ma(aa+i-1,j) = sig_1(i,j)
sig_xma(aa+i-1,j) = sig_x(i,j)
sig_yma(aa+i-1,j) = sig_y(i,j)
sig_zma(aa+i-1,j) = sig_z(i,j)
enddo
enddo
else
do i=1,Nx
aai=aa+i-1
if (aai .gt. 2*Nx) aai=2*Nx !Safety check
! surface
do j=1,NN
P_asp(aai,j) = max(P_asp (aai,j), P(i,j))
if ( sig_1s(i,j) .GT. sig_1msa(aai,j)) then
sig_1msa(aai,j) = sig_1s(i,j)
s1 = sig_1s(i,j)
sx = sig_xs(i,j)
sy = sig_ys(i,j)
sz = sig_zs(i,j)
txy = tau_xys(i,j)
txz = tau_xzs(i,j)
tyz = tau_yzs(i,j)
Call s1_direction(s1, sx, sy, sz, txy, txz, tyz, n_x, n_y, n_z)
nx_s(aai,j) =N_x
ny_s(aai,j) =N_y
nz_s(aai,j) =N_z
endif
sig_1msa(aai,j) = max(sig_1msa (aai,j), sig_1s(i,j))
sig_vmmsa(aai,j) = max(sig_vmmsa (aai,j), sig_vms(i,j))
tau_max_as(aai,j)= max(tau_max_as (aai,j), taus(i,j))
sig_xmsa(aai,j) = max(sig_xmsa (aai,j), sig_xs(i,j))
sig_ymsa(aai,j) = max(sig_ymsa (aai,j), sig_ys(i,j))
sig_zmsa(aai,j) = max(sig_zmsa (aai,j), sig_zs(i,j))
enddo
!depth
do j=1, NZ
if ( sig_1(i,j) .GT. sig_1ma(aai,j)) then
sig_1ma(aai,j) = sig_1(i,j)
s1 = sig_1(i,j)
sx = sig_x(i,j)
sy = sig_y(i,j)
sz = sig_z(i,j)
txy = tau_xy(i,j)
txz = tau_xz(i,j)
tyz = tau_yz(i,j)
Call s1_direction(s1, sx, sy, sz, txy, txz, tyz, n_x, n_y, n_z)
nx_d(aai,j) =N_x
ny_d(aai,j) =N_y
nz_d(aai,j) =N_z
endif
sig_1ma(aai,j) = max(sig_1ma (aai,j), sig_1(i,j))
sig_vmma(aai,j) = max(sig_vmma (aai,j), sig_vm(i,j))
tau_max_a(aai,j)= max(tau_max_a (aai,j), tau(i,j))
sig_xma(aai,j) = max(sig_xma (aai,j), sig_x(i,j))
sig_yma(aai,j) = max(sig_yma (aai,j), sig_y(i,j))
sig_zma(aai,j) = max(sig_zma (aai,j), sig_z(i,j))
enddo
enddo
endif
RETURN
end
! A subroutine to calculate the direction of s1 in the x,y,z coordinate system.
Subroutine s1_direction(s1, sx, sy, sz, txy, txz, tyz, nx, ny, nz)
implicit none
real*8 s1, sx, sy, sz, txy, txz, tyz, nx, ny, nz
real*8 nxn, nyn, nzn
real*8 Cx1, Cx2, Cy1, Cy2, Cz1, Cz2
if( s1 .EQ. sx) then
nx=1
ny=0
nz=0
elseif(s1 .EQ. sy)then
nx=0
ny=1
nz=0
elseif(s1 .EQ. sz) then
nx=0
ny=0
nz=1
else! From page 5 in Formelsamlingen. If one direction component is close to zero, the calculations gets more messy. Becouse of this we have the if statements
Cx1 = (txz*tyz/((s1-sz)*(s1-sy)) + txy/(s1-sy)) /( 1.0 - tyz*tyz/(s1-sz)*(s1-sy))
Cy1 = (txy*txz/((s1-sx)*(s1-sz)) + tyz/(s1-sz)) /( 1.0 - txz*txz/(s1-sx)*(s1-sz))
Cz1 = (tyz*txy/((s1-sy)*(s1-sx)) + txz/(s1-sx)) /( 1.0 - txy*txy/(s1-sy)*(s1-sx))
Cx2 = (txz+Cx1*tyz)/(s1-sz)
Cy2 = (txy+Cy1*txz)/(s1-sx)
Cz2 = (tyz+Cz1*txy)/(s1-sy)
nx = 1.0/sqrt(1.0**2 +Cx1**2 +Cx2**2)
ny = 1.0/sqrt(1.0**2 +Cy1**2 +Cy2**2)
nz = 1.0/sqrt(1.0**2 +Cz1**2 +Cz2**2)
! If rotating around on axis, that n becomes 1 from the above equations, but that should not be the case.
! Not needed when I take the middle value
!If( Cx1 .eq. 0 .and. Cx2 .EQ. 0) nx=0
!If( Cy1 .eq. 0 .and. Cy2 .EQ. 0) ny=0
!If( Cz1 .eq. 0 .and. Cz2 .EQ. 0) nz=0
! Try with taking the middle value instead since it did not work with the greatest
If((abs(nx) .GT. abs(ny) .AND. abs(NX) .LE. abs(nz)) .or. (abs(nx) .LT. abs(ny) .AND. abs(NX) .GT. abs(nz)) )then
ny = Cx1*nx
nz = Cx2*nx
elseif( (abs(ny) .GT. abs(nx) .AND. abs(Ny) .LE. abs(nz)) .or. (abs(ny) .LT. abs(nx) .AND. abs(Ny) .GT. abs(nz)) ) then
nz = Cy1*ny
nx = Cy2*ny
else
nx = Cz1*nz
ny = Cz2*nz
endif
endif
return
end