Fracture behavior of additively manufactured acrylonitrile butadiene styrene (ABS) materials

摘要: Abstract The effect of layer orientation on the fracture properties poly(acrylonitrile-butadienestyrene) (ABS) materials fabricated through fused filament fabrication (FFF) process was explored. Critical elastic-plastic strain energy release rates single edge notch bend (SENB) specimens with variable crack-tip/laminae orientations were compared. Results show that inter-laminar toughness (fracture between layers) is approximately one order magnitude lower than cross-laminar similarly manufactured parts. Contrasting brittle and ductile behavior observed for crack propagation, respectively, demonstrating response AM ABS parts governed by direction propagation within laminated structure. Fracture surfaces failed are examined using scanning electron microscopy to micro- macro-scale toughening/embrittling mechanisms. Techniques designing tougher additively based biological analogies discussed.