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Are these properties unique to printing in titanium? Doesn't sound like it. So hopefully we will see this as an infill option soon.

by larsrc 3y ago

Animats 3y ago
Right. This should be helpful for all 3D printing. Finite element analysis on infill patterns looks like it helps. This pattern looks like it's designed for an isotropic material. Sintered metal printers ought to produce solid metal. Extrusion printers, though, tend to have weaker inter-layer bonds than bonds within the layer. So this may not work as well in PLA. Might need a pattern that compensates for the weaker inter-layer bonds.
- jayyhu 3y ago
  Also helpful for Stereolithographic printers (SLA/DLP/LCD), since they also don't have inter-layer adhesion issues like extrusion printers.
- interstice 3y ago
  Recently saw an interesting infill/layer pattern that offset the layers and spaced them (think hexagonal pattern when viewed from the side) - might help with the single plane delaminating issue. Combined with this style of infill pattern we could be getting somewhere. Makes me wish I had time to mess around with GCODE
  - krasin 3y ago
    This sounds a lot like "brick layers" by CNC Kitchen: https://www.youtube.com/watch?v=5hGm6cubFVs https://www.youtube.com/watch?v=5hGm6cubFVs - I believe that something like that will be a must for future 3d printing slicers, as it increases mechanical strength with no extra hardware needed.
thfuran 3y ago
No, I know I've read an article about 3d printed steels being stronger if arranged just so. Edit: it was probably about https://www.science.org/content/article/3d-printing-doubles-strength-stainless-steel https://www.science.org/content/article/3d-printing-doubles-... It looks like there might be enough difference in relevant scale that both techniques could be applied.
ChuckMcM 3y ago
Not according to the article, the mechanics are structural. That said, I downloaded the 'cube' picture that was the banner and the cube does not use the structure described in the article. That makes me a bit curious. The article goes out of the way to talk about the tubular structure that is bisected by a solid structure. And yet the cube has only tubes, and where the tubes are unfinished at the edges, the tubes appear to have an internal bisection. One of the fun things is that you absolutely could not injection mold this :-). Generating it as an infill would be interesting. I'm generating some cubes with CAD (since that is easy to do) that printed at 100% infill will (aka no guessing on the slicer's part) will let me try their cube structure, the paper's suggested structure, and others. I'm going to guess they patented it (could be wrong but most university research seems to go for patents) so it might not be possible? to put it into an infill library without dealing with that.

Are these properties unique to printing in titanium? Doesn't sound like it. So hopefully we will see this as an infill option soon.

by larsrc 3y ago

Are these properties unique to printing in titanium? Doesn't sound like it. So hopefully we will see this as an infill option soon.

Animats 3y ago

Right. This should be helpful for all 3D printing. Finite element analysis on infill patterns looks like it helps. This pattern looks like it's designed for an isotropic material. Sintered metal printers ought to produce solid metal. Extrusion printers, though, tend to have weaker inter-layer bonds than bonds within the layer. So this may not work as well in PLA. Might need a pattern that compensates for the weaker inter-layer bonds.

jayyhu 3y ago
Also helpful for Stereolithographic printers (SLA/DLP/LCD), since they also don't have inter-layer adhesion issues like extrusion printers.
interstice 3y ago
Recently saw an interesting infill/layer pattern that offset the layers and spaced them (think hexagonal pattern when viewed from the side) - might help with the single plane delaminating issue. Combined with this style of infill pattern we could be getting somewhere. Makes me wish I had time to mess around with GCODE
- krasin 3y ago
  This sounds a lot like "brick layers" by CNC Kitchen: https://www.youtube.com/watch?v=5hGm6cubFVs https://www.youtube.com/watch?v=5hGm6cubFVs - I believe that something like that will be a must for future 3d printing slicers, as it increases mechanical strength with no extra hardware needed.

thfuran 3y ago

No, I know I've read an article about 3d printed steels being stronger if arranged just so. Edit: it was probably about https://www.science.org/content/article/3d-printing-doubles-strength-stainless-steel https://www.science.org/content/article/3d-printing-doubles-... It looks like there might be enough difference in relevant scale that both techniques could be applied.

ChuckMcM 3y ago

Not according to the article, the mechanics are structural. That said, I downloaded the 'cube' picture that was the banner and the cube does not use the structure described in the article. That makes me a bit curious. The article goes out of the way to talk about the tubular structure that is bisected by a solid structure. And yet the cube has only tubes, and where the tubes are unfinished at the edges, the tubes appear to have an internal bisection. One of the fun things is that you absolutely could not injection mold this :-). Generating it as an infill would be interesting. I'm generating some cubes with CAD (since that is easy to do) that printed at 100% infill will (aka no guessing on the slicer's part) will let me try their cube structure, the paper's suggested structure, and others. I'm going to guess they patented it (could be wrong but most university research seems to go for patents) so it might not be possible? to put it into an infill library without dealing with that.