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Strength Analysis of CFRP Composite Material Considering Inter-Laminar Fractures

Journal Article
2015-01-0694
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 14, 2015 by SAE International in United States
Strength Analysis of CFRP Composite Material Considering Inter-Laminar Fractures
Sector:
Citation: Naito, T. and Urushiyama, Y., "Strength Analysis of CFRP Composite Material Considering Inter-Laminar Fractures," SAE Int. J. Mater. Manf. 8(3):905-911, 2015, https://doi.org/10.4271/2015-01-0694.
Language: English

Abstract:

The strength characteristic of CFRP composite materials is often dependent on the internal micro-structural fracture mode. When performing a simulation on composite structures, it is necessary to take the fracture mode into account, especially in an automobile body structure with a complex three-dimensional shape, where inter-ply fractures tend to appear due to out-of-plane load inputs. In this paper, an energy-based inter-ply fracture model with fracture toughness criteria, and an intra-ply fracture model proposed by Ladeveze et al. were explained. FEM analyses were performed on three-dimensional test specimens applying both fracture models and the simulated results were compared with experimental ones. Reproducibility of the fracture mode was confirmed and the importance of combining both models was discussed.