Learning Forum

[Noura Mansour]

although i insert a boundry condiotion ( force in y direction and in other directions to be zero ) , the spring not compressed in one direction 

[peteroznewman]

Promote the Remote Force to a Remote Point.  Apply a Remote Displacement and scope it to the Remote Point you just created. If the axis of the spring is the Y axis,  set X = 0 and Z = 0 and leave Y to be Free. That will constrain the Remote Point to move only along the Y axis.

[Noura Mansour]

Thank you for your effort i understood but i have questions ..
why if i insert the displacement as a boundry condition i got a curve between force and displacement this curve not as same as when i insert the remot force as a boundry condition?
,  when i insert remot force as boundry condiition the behaviour i used is deformable is it true ?
  ..and if i want to get chart between force and displacement i insert reaction force scope it to the fixed support or to remote displacement ? i used it as a fixed support                                    

[peteroznewman]

If you use a Remote Displacement for the Y deformation instead of a force, you should look at the Force Reaction in the Y direction, which is the direction the spring is being compressed. I assume you don't want to look at the lateral forces the spring is exerting on the constraint trying to go sideways.

If you apply a Remote Force, the force is proportional to Time.  Make the End Time equal to the final value of the Remote Force, then the Displacement vs Time plot can be read as Displacement vs Force.

[Noura Mansour]

Sorry but i can't understand if i want to get a chart between force and displacement of spring what should I do? 

i inserted a remote force as a boundary condition and in solution tree i selected directional deformation in y direction and reaction force at fixed support And then created the chart .. 

 

Is it differ from if i make end time equal to final value of remote force? 

????

 

[peteroznewman]

What you did works.  The other method is slightly faster to get some data to plot.

[Noura Mansour]

how can i apply the other method?
how can i change the end time

[peteroznewman]

Under Analysis Settings, where it says End Time and there is a 1.0  type in the final force value.

[Noura Mansour]

define also intial , minimum and maximum substeps?

[peteroznewman]

Just like you did before.