Mechanism based failure of 3D-printed continuous carbon fiber reinforced thermoplastic composites
Journal article, 2021

The present work describes a computational mechanism based failure analysis conducted for 3D-printed continuous carbon fiber reinforced thermoplastic composites (CFRTPCs), which could not be seen in the available literature. The material failure is investigated based on intraply failure evaluation and adopts different failure criteria for the material constituents. The micromechanical modeling employs the Asymptotic Homogenization technique and comprises the selection of a representative volume element statistically equivalent to the microstructure of the material, which is identified from cross-section micrographs. In contrast to recent work, it is demonstrated that an additional relation is required for the macroscopic deviatoric stresses acting over the matrix. This avoids an overestimation of the matrix failure when the reinforced lamina is subjected to longitudinal and shear loads. The resulting failure envelopes are presented and compared to those provided by analytical failure theories available in the literature. The results obtained by the micromechanical approach showed its ability to predict failure of 3D-printed CFRTPCs, in addition to bring different elements for the discussion that could not be captured with analytical models. In this context, it is believed that the characteristics inherent to the microstructure reproduced in the RVE,  articularly contributed to obtaining more realistic failure envelopes.

Multi-mechanism modelling

3D printing

Failure criterion

Polymer-matrix composites (PMCs)

Author

Thiago Dutra

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

GPMA-Research Group on Additive Manufacturing, DCTA ITA IEM, ITA-Aeronautics Institute of Technology

Rafael Thiago Luiz Ferreira

GPMA-Research Group on Additive Manufacturing, DCTA ITA IEM, ITA-Aeronautics Institute of Technology

GPMA-Research Group on Additive Manufacturing, DCTA ITA IEM, ITA-Aeronautics Institute of Technology

Brina Blinzler

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Leif Asp

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Composites Science and Technology

0266-3538 (ISSN)

Vol. 231 108962

Subject Categories

Production Engineering, Human Work Science and Ergonomics

Polymer Technologies

Vehicle Engineering

Driving Forces

Sustainable development

Areas of Advance

Transport

Materials Science

DOI

10.1016/j.compscitech.2021.108962

More information

Latest update

8/13/2021