Reinforce screw holes

Question

I made some 3D printed supports for tools, using screws to fix it to the wall, some of them broken because of the screw forces. Is there a way to reinforce only the screw holes where it will have more stress/compress? I am using PLA, Fusion 360 and Ultimaker Cura.

Answer 1

You can test different print settings. Trying to visualize, but I believe you can increase the perimeter lines, since there is a hole, this will increase the resistance in that area. Or try to change the orientation with which the part will be printed

Answer 2

You can use a washer between the screw head and the plastic material to distribute the load

In my designs I also put in a depression to fit the washer so that it sits flush with the resultant surface.

Answer 3

In order to add localised extra walls, I will sometimes cut a torus shape around the part that I want to strengthen. This can result in n*wall, infill, n*wall, void, n*wall.

See the images in this answer if the description is not clear.