How to identify the node with maximum reaction force for on a surface?

[hexa2016]

Hello,

After solution, how can i identified which node has maximum reaction force on a surface and plot the force-displacement for the node?

Im using ANSYS apdl .

Thanks...

 

[Erik Panos Kostson]

One way could be to select all nodes on that face and do a NFORCE,ALL (Sum @ each node, nodal calcs. tool).

To select all the nodes on a face one could use say:
asel,s,area,,1,, ! ! Selects Area nr 1
nsla,s,1 ! Selects node on this area
Nforce,all for the list of reactions. One can view the largest one in the file/list generated.

Alternatively one can loop[ through all nodes and get the largest nodal reaction stored in MAXRF (example below, FZ reaction).

MAXRF=0.00
MAXRFNNN=0.00
*GET, MAXNODE, NODE, 0, NUM, MAX
*DO,I,1,MAXNODE      ! 
*GET, MAXRFL, NODE,I, RF, FZ,
*IF,ABS(MAXRFL),GT,ABS(MAXRF),THEN
MAXRF=ABS(MAXRFL)
MAXRFNNN=I
*ENDIF
*ENDDO

Finally once the node number is known the Time History PostProc (/post26). can be used to plot say the reaction vs disp. curves.

 

[hexa2016]

Thanks Erik for the reply..i will try as proposed...