A physically based model for kink-band growth and longitudinal crushing of composites under 3D stress states accounting for friction
Artikel i vetenskaplig tidskrift, 2016

A material model to predict kink-band formation and growth under a 3D stress state is proposed. 3D kinking theory is used in combination with a physically based constitutive law of the material in the kink-band, accounting for friction on the microcracks of the damaged material. In contrast to existing models, the same constitutive formulation is used for fibre kinking and for the longitudinal shear and transverse responses, thereby simplifying the material identification process. The full collapse response as well as a crush stress can be predicted. The model is compared with an analytical model, a micromechanical finite element analysis and crushing tests. In all cases the present model predicts well the different stages of kink-band formation and crushing.

friction

crushing

fibre kinking

damage mechanics

Författare

Renaud Gutkin

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Sergio Costa

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Robin Olsson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Composites Science and Technology

0266-3538 (ISSN)

Vol. 135 39-45

Ämneskategorier

Teknisk mekanik

Annan materialteknik

Kompositmaterial och -teknik

DOI

10.1016/j.compscitech.2016.09.002

Mer information

Skapat

2018-11-01