local coordinate system

[dermicha29]

hi everybody,

i would like to define a local coordinate system in abaqus/cae version 6.4 that is able to move with the deformed body. I want to use it for applying boundary conditions on a moving surface, that needs to be plane during the deformation. can anybody help me?

thanks in advance,

michael

 

[xerf]

If you need a surface to remain plane during deformation, you might be interested in defining an Equation based on the nodes of that surface.

See:
ABAQUS/CAE User's Manual ->15.14.7 Defining equation constraints

 

[Yoman228]

You first need to create a new Datum CSYS (think icon was still on the right). Then when you define Boundary coundition, use the new Datum you creates instead of the Global.

 

[brep]

Try this.

(1) create reference point on the face to remain planar
(2) create a cartesian csys located at the reference point and oriented such that axis 3 is normal to the planar face
(3) create kinematic coupling: control point is the reference point from (1), surface is the face to remain planar
(4) create a BC, with the local csys from step (2)as the reference and fix in U3

It's pretty easy to do and very easy to create a macro/plugin to automate.

 

[dermicha29]

thanks for your replies, i think it will work soon.