MPC184

Hi all,

can someone explan why the nodes 2 and 3 move together?
i was trying to get them to move only after some displacement...

thanks in advance,

here is my code:

! test endstops

/clear
fini

/PREP7
MP,PRXY,1,0.3
MP,EX,1,200e9
MP,DENS,1,7850

ET,1,BEAM188 ,,,3 ! cubic shape function
SECT,1,BEAM,RECT ! BEAM PROPERTIES
SECD,0.1,0.1

N,1,0
N,2,1
N,3,1
N,4,2

Mat,1

TYPE,1
SECN,1
E,1,2
E,3,4

*AFUN,RAD
ET,2,MPC184,6,,,1
SECTYPE,2,JOINT,REVO ! REVOLUTE JOINT
LOCAL,11,0,1
SECJOIN,,11,11
SECSTOP,6,-3.14,3.14 ! ALLOW 180 DEG. ROTATION
!SECSTOP,6,-.6435,0.6435 ! ALLOW 37 DEG. ROTATION
!SECLOCK,6,-1.287,1.287 ! ALLOW 74 DEG. ROTATION THEN LOCK-UP

TYPE,2
SECN,2
E,2,3

/eshape,1
eplot

/SOLU
lsclear,all

alls
d,1,all
d,4,all
f,2,fy,-1000

alls
NLGEOM,ON
NSUBST,5
SOLVE

/POST1
file,file,rst
set,last
alls
/eshape,0
/dscale,,100
plnsol,u,sum

*GET,UY2,NODE,2,U,Y
*GET,UY3,NODE,3,U,Y

*GET,rotz2,NODE,2,rot,z
*GET,rotz3,NODE,3,rot,z