Multimaterial Extrusion‐Based Additive Manufacturing of Compliant Crack Arrester: Influence of Interlayer Length, Thickness, and Applied Strain Rate

Additive manufacturing is a useful tool for fabricating complex multimaterial structures. Compliant interlayers (ILs) can easily be introduced into stiff materials to increase toughness and stop or impede crack growth, as done in nature. The aim herein analyze the influence of varying IL lengths thicknesses on propagation 3D-printed polymers at different loading rates. A glycol-modified poly(ethylene terephthalate) used matrix material, while thermoplastic elastomer copolyester basis serves an compliant IL. Specimen fabrication with fused filament 3D printer equipped unit, which allows print component composed several within one print. Additively manufactured Charpy samples are tested three-point bending rates between 0.1 mm min−1 3.8 m s−1. thickness almost shows no effect energy absorption long remaining same printing orientation rate. For lengths, constant fight penetration deflection occurs. At low rates, acts defect. As rate increases, total absorbed composites increases compared pure material.