A constitutive model for the impact behavior of FFF 3D-printed Tough PLA

Tatiana Stepanova, Alireza Zarei, Gang Li, Yong Huang, Srikanth Pilla, Department of Automotive Engineering, Clemson University, Center for Composite Materials, University of Delaware, Department of Mechanical Engineering, Clemson University, Department of Mechanical and Aerospace Engineering, University of Florida, Department of Mechanical Engineering, University of Delaware, Department of Materials Science and Engineering, University of Delaware, Department of Chemical and Biomolecular Engineering, University of Delaware

Journal of Reinforced Plastics and Composites

Published online on May 14, 2026

Abstract

Journal of Reinforced Plastics and Composites, Ahead of Print.
Advancements in Fused Filament Fabrication (FFF) have enabled the production of polymers with enhanced properties. However, their complex mechanical behavior, especially under impact, remains difficult to model. This study introduces a constitutive model ...