Compressive failure and kink-band formation modeling
Artikel i vetenskaplig tidskrift, 2023

To increase the use of polymeric structural composites, a major issue is to properly account for intra-laminar failure mechanisms, such as fiber kinking induced under compression. We propose a new continuum damage model that can predict the fiber kinking response at the ply level. The model is based on a previous structure tensor-based model for the response of UD-plies. A novel feature is that the compressive UD-ply response at the macroscale includes the effect of the fiber misalignment shaped as a kink-band that is resolved at the sub-scale. Concepts of computational homogenization are used to include the fiber-shear of the kink-band at the sub-scale. The model calibration is adapted to account for either kink-band formation or shear-splitting depending on the off-axis loading. Finally, the model is validated at the laminate level against experimental data for OHC-tests available in the literature. A good agreement is found for predicted strength values and observed fracture patterns of the laminates. The size effect experienced when different hole sizes are tested is also addressed.

Fiber kinking

Non-local damage



Continuum damage


Ragnar Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Giovanni Brambati

Politecnico di Milano

Renaud Gutkin

Chalmers, Industri- och materialvetenskap


European Journal of Mechanics, A/Solids

0997-7538 (ISSN)

Vol. 99 104909


Teknisk mekanik

Bioinformatik (beräkningsbiologi)

Kompositmaterial och -teknik





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