Work

Fracture characterization of ductile polymer cellular model structures manufactured by FDM

Year: 2025

Type: article

Abstract: This work addresses specific fundamental and methodological issues regarding the applicability of Fracture Mechanics (FM) testing schemes to polymer open-celled cellular solids with controlled architecture, exhibiting an elastic-plastic response and with pronounced structural heterogeneity at the cell-scale. Acrylonitrile-Butadiene-Styrene (ABS) model structures were manufactured by Fused Deposition Modelling (FDM), and their mode-I fracture response investigated. Structures with different porosity degrees (from ≈20% to ≈70%) were examined, and initiation fracture toughness (J-integral) data determined. Different modes of mechanical macro-confinement experienced by the circular cross-section beam-like structural element were noticed, able to drive a transition from true cellular to solid containing isolated pores.

Source: Engineering Fracture Mechanics

DOI: 10.1016/j.engfracmech.2025.111011