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!
! CalculiX - A 3-dimensional finite element program
! Copyright (C) 1998-2015 Guido Dhondt
!
! This program is free software; you can redistribute it and/or
! modify it under the terms of the GNU General Public License as
! published by the Free Software Foundation(version 2);
!
!
! This program is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License
! along with this program; if not, write to the Free Software
! Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
!
subroutine negativepressure(ne0,ne,mi,stx,pressureratio)
!
! calculating the ratio of the smallest pressure to the
! largest pressure for face-to-face contact
! if the pressure is somewhere negative, this ratio will
! be negative
!
implicit none
!
integer ne0,ne,mi(*),i
!
real*8 stx(6,mi(1),*),presmin,presmax,pressureratio
!
presmax=0.d0
presmin=0.d0
!
do i=ne0+1,ne
if(stx(4,1,i).gt.presmax) then
presmax=stx(4,1,i)
elseif(stx(4,1,i).lt.presmin) then
presmin=stx(4,1,i)
endif
enddo
pressureratio=presmin/presmax
!
return
end
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