Mechanism based failure of 3D-printed continuous carbon fiber reinforced thermoplastic composites
Artikel i vetenskaplig tidskrift, 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)

Författare

Thiago Dutra

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

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

ITA

Brina Blinzler

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Leif Asp

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Composites Science and Technology

0266-3538 (ISSN)

Vol. 231 108962

Ämneskategorier

Produktionsteknik, arbetsvetenskap och ergonomi

Polymerteknologi

Farkostteknik

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Materialvetenskap

DOI

10.1016/j.compscitech.2021.108962

Mer information

Senast uppdaterat

2021-08-13