Issue 148 in sfepy: Develop term for concentrated point loads

[sf...@googlecode.com]

Status: Accepted
Owner: freevryheid
Labels: Type-Enhancement Priority-Medium

New issue 148 by freevryheid: Develop term for concentrated point loads
http://code.google.com/p/sfepy/issues/detail?id=148

We have a surface traction term that can be applied to surfaces for 3D
models and edges for 2D models. Similarly, we need a "line traction" term
that can be applied to edges for 3D models and points for 2D models.

I remember years back applying a simple conversion where a edge load is
converted to point loads concentrated at the nodes along the edge.

The current formulation is perfect for strain-controlled tests but a term
to apply point loads would be useful for stress-controlled tests.

[sf...@googlecode.com]

Comment #1 on issue 148 by robert.cimrman: Develop term for concentrated
point loads
http://code.google.com/p/sfepy/issues/detail?id=148

I agree that having those terms is useful.

If you need to simulate stress-controlled tests, you can proceed IMHO even
now as follows:

- if you need to apply stress, dw_surface_ltr is ok.
- if you need to apply force F:
- the load is applied to some surface region (right?), so use d_surface
to compute the surface S of the region, get the stress as F/S and use
dw_surface_ltr

Does it help?

[sf...@googlecode.com]

Updates:
Status: Fixed

Comment #2 on issue 148 by robert.c...@gmail.com: Develop term for

concentrated point loads
http://code.google.com/p/sfepy/issues/detail?id=148

There is new dw_point_load now (quite easy to implement!).

[sf...@googlecode.com]

Updates:
Status: Migrated

Comment #3 on issue 148 by robert.c...@gmail.com: Develop term for
concentrated point loads
http://code.google.com/p/sfepy/issues/detail?id=148#c3

Migrated to http://github.com/sfepy/sfepy/issues/150