Hello, Everyone!
This is the first time that I come here to ask for help,so I wish that I can get the answer!
I'm modeling with ABAQUS, My problem is how to use a subroutine which contains two external functions ?I need your help, Thank you!
SUBROUTINE UTRACLOAD(ALPHA,T_USER,KSTEP,KINC,TIME,NOEL,NPT,
1 COORDS,DIRCOS,JLTYP,SNAME)
C
INCLUDE 'ABA_PARAM.INC'
C
CHARACTER*80 SNAME
DIMENSION T_USER(3), TIME(2), COORDS(3), DIRCOS(3,3)
pi=2.*ASIN(1.0)
ALPHA=200*pulse(TIME(1))+10*pulse_u(TIME(1))
T_USER(1)=1
T_USER(2)=0
T_USER(3)=0
RETURN
end
function pulse(t)
pulse=0.0
if(t.ge.0.and.t.le.0.50)then
pulse=4*pi*cos(4*pi*t)-4*pi*cos(8*pi*t)
else
pulse=0.0
endif
end function
function pulse_u(t)
pulse_u=0
if(t.ge.0.and.t.le.0.50)then
pulse_u=sin(4*pi*t)-0.5*sin(8*pi*t)
else
pulse_u=0.0
endif
end function
Can you be more specific
Can you be more specific about the problem. At a first glance your code seems to be ok. Also,if it was the question, you can place any number of subroutines in .f file which you 'give' to ABAQUS. Functions with predefined names (like UMAT,UTRACLOAD ... ) are linked to ABAQUS and used in the analysis providing corresponding options are set in the model. Other functions are also linked to project and are used only if called from mentioned predefined functions.