As a new user of Femap I was wondering what is the best practice for creating holes in a solid part. I recently came across a problem where I imported an assembly and the placementment of the bolt holes was not confirmed yet. I had to run the analysis and based on my analysis I had to suggest possible bolt locations within the design constraints.
The went about the task using the following steps:
1. I created the holes (using curves) at the desired location.
2. Geometry -> Solid -> Extrude -> Extruded the Curves (step 1):
Material -> New Solid
Direction -> Negative
Length -> To Depth
Surface -> Select the surface bounded by the curves (step 1)
3. Geometry -> Solid -> Remove
Let me know how you would approach the issue.
Solved! Go to Solution.
If I have to create a hole in a solid part I will use the following method:
I would also recommend the method suggested by Blas to create the hole.
If the hole is a blind hole, rather than a through hole AND/OR if you need to create numerous holes in one go, then after Blas' Geometry -> Curve from Surface -> Project step, you could use Custom Tools -> Geometry Processing -> Extrude Multiple Surfaces to extrude all the imprinted hole faces into the solid, thus creating all the solids representing the holes in one go. Then you can use Geometry -> Solid -> Remove to subtract all the hole solids from the main solid in one go.
Finally, if part of your analysis is to move the holes, take a look at the Meshing Toolbox -> Feature Editing ... Translate or Rotate Surfaces.
This allows you to move the holes around the solid, and if the basic topology remains the same, it is the quickest way to make your modifications, and will preserve all your loads and constraints and automatically remesh the part. It gets a little more complicated if you have any rigid elements connected to the solid mesh, but that's another topic.