Estimates of fracture energy for trilayer AM beam specimens were obtained using several geometries commonly used in characterizing adhesive bonds. The viscoe-lastic nature of the printed acrylic specimens complicated the analysis, though results suggested that such specimen configurations offer the potential for accurate characterization of interfaces in additive manufactured material systems. Significant differences were seen depending on the print build orientation used to fabricate the specimens. Generally, interfaces that were simultaneously deposited and cured performed better than interfaces in which the layers were added sequentially. Preliminary evidence suggests the possibility of enhancing interfacial fracture resistance using graded interfaces.
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