# 3D printing

Strength in fused-filament PLA parts modified with organo-modified montmorillonite depends jointly on clay exfoliation, melt rheology, interlayer thermal bonding and pore morphology, while earlier optimization mapped filler fraction and print parameters directly to mechanical properties. C³M-OMMT Twin chains clay exfoliation and rheology state, layer-by-layer thermal history, defect-interface graphs, causal mechanical response, Bayesian Pareto optimization and experimental validation. Across 0 to 5 wt.% clay and nozzle temperatures from 195 to 225 °C, its optimum is about 2 wt.% clay, 215 °C, 0.15 mm layer height and 35 mm/s, giving 62.5 MPa tensile strength, 94.1 MPa flexural strength and 2.18% void fraction.

Strength in fused-filament PLA parts modified with organo-modified montmorillonite depends jointly on clay exfoliation, melt rheology, interlayer thermal bonding and pore morphology, while earlier optimization mapped filler fraction and print parameters directly to mechanical properties. C³M-OMMT Twin chains clay exfoliation and rheology state, layer-by-layer thermal history, defect-interface graphs, causal mechanical response, Bayesian Pareto optimization and experimental validation. Across 0 to 5 wt.% clay and nozzle temperatures from 195 to 225 °C, its optimum is about 2 wt.% clay, 215 °C, 0.15 mm layer height and 35 mm/s, giving 62.5 MPa tensile strength, 94.1 MPa flexural strength and 2.18% void fraction.

Researchers at MIT CSAIL, Google and Northeastern University present InstructMesh, which combines Microsoft's TRELLIS 3D generator with the GPT-4 language model so users can edit 3D designs in natural language and with sliders inside the generative model's latent space; using TRELLIS to recreate popular Thingiverse models, the team found nearly 80 percent had structural flaws, while novices identified and fixed those issues about 90 percent of the time as reviewed by an expert, and they printed objects including a dragon-wrapped mug, butterfly-wing glasses, an octopus-like drink dispenser, a denim-look knee brace and a shrimp-shaped bristle bot.

Researchers at MIT CSAIL, Google and Northeastern University present InstructMesh, which combines Microsoft's TRELLIS 3D generator with the GPT-4 language model so users can edit 3D designs in natural language and with sliders inside the generative model's latent space; using TRELLIS to recreate popular Thingiverse models, the team found nearly 80 percent had structural flaws, while novices identified and fixed those issues about 90 percent of the time as reviewed by an expert, and they printed objects including a dragon-wrapped mug, butterfly-wing glasses, an octopus-like drink dispenser, a denim-look knee brace and a shrimp-shaped bristle bot.