Embedding strengthening members in 3D printed parts

I wondered how much I could strengthen a printed I-beam by installing steel rebar during print pauses.  It turns out it worked without a hitch and increased the beam break force by around 50%.  I think the strength would go up a LOT more if I were to optimize the beam geometry to take more advantage of the steel reinforcement members.

I’m not sure if the pics will upload correctly but here’s a link to the test results which has all the info, including pictures.  Its also attached, if that works…




Interesting idea.  Could these nanobeams be used in your application:


They were developed with a Kickstart campaign but the guy is now commercial.