Probabilistic modeling of fiber–matrix interface stresses in short-fiber 3D printed composites using effective field methods

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Abstract

This study presents a novel probabilistic modeling approach to investigate the impact of interfacial damage between fibers and the matrix on 3D-printed composites. The approach employs effective field methods (EFM) and Weibull statistics and considers an elastoplastic matrix reinforced with short fibers. A new formulation is developed to compute normal and shear interface stresses using the internal stress of each fiber, which is modeled as an ellipsoid with various aspect ratios. The approach is applied to 3D-printed PLA reinforced with short basalt fibers and compared to literature experiments. The results demonstrate that the proposed approach can aid in understanding interfacial damage and explain the progressive softening of the stress–strain response of composite structures.

Original languageEnglish
Article number104934
Number of pages11
JournalMechanics of Materials
Volume191
DOIs
Publication statusPublished - Apr 2024

Bibliographical note

Funding Information:
The financial contribution of the FWO Research Foundation–Flanders (file number 1102822N) is gratefully acknowledged.

Publisher Copyright:
© 2024 Elsevier Ltd

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