Abstract:Structures formed by fused filament fabrication are often substantially weaker than those made with conventional techniques, and fail at the welds between successive layers. One factor that may influence strength is flow-induced alignment of deposited material. Recent work suggests that alignment reduces the entanglement density and thus should accelerate welding by diffusion. Here, coarse-grained molecular simulations are used to test the effect of molecular alignment on diffusion and weld strength. While sta… Show more
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