Estimations of the effective Young's modulus of specimens prepared by fused filament fabrication

Lichen Fang, Yishu Yan, Ojaswi Agarwal, Jonathan E. Seppala, Kalman D. Migler, Thao D. Nguyen, Sung Hoon Kang

Research output: Contribution to journalArticlepeer-review

Abstract

The elastic response of homogeneous isotropic materials is most commonly represented by their Young's modulus (E), but geometric variability associated with additive manufacturing results in materials that are neither homogeneous nor isotropic. Here we investigated methods to estimate the effective elastic modulus (Eeff) of samples fabricated by fused filament fabrication. We conducted finite element analysis (FEA) on printed samples based on material properties and CT-scanned geometries. The analysis revealed how the layer structure of a specimen altered the internal stress distribution and the resulting Eeff. We also investigated different empirical methods to estimate Eeff as guides. We envision the findings from our study can provide guidelines for modulus estimation of as-printed specimens, with the potential of applying to other extrusion-based additive manufacturing technologies.

Original languageEnglish (US)
Article number101983
JournalAdditive Manufacturing
Volume42
DOIs
StatePublished - Jun 2021
Externally publishedYes

Keywords

  • Effective Young's modulus
  • Extrusion
  • Fused filament fabrication
  • Tension test

ASJC Scopus subject areas

  • Biomedical Engineering
  • General Materials Science
  • Engineering (miscellaneous)
  • Industrial and Manufacturing Engineering

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