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Micromechanics-based phase field fracture modelling of CNT composites

Leonel_Quinteros's picture

 

Dear iMechanicians,

 

 I hope you find the following article useful. We develop the first phase field fracture formulation for CNT-based composites. A mean-field homogenisation approach is combined with a micromechanical description of carbon nanotube's fracture and pull-out, including the agglomeration effect.

 Micromechanics-based phase field fracture modelling of CNT composites

Quinteros, L., García-Macías, E., & Martínez-Pañeda, E. (2022). Micromechanics-based phase field fracture modelling of CNT composites. Composites Part B: Engineering, 236, 109788.

 

We present a novel micromechanics-based phase field approach to model crack initiation and propagation in carbon nanotube (CNT) based composites. The constitutive mechanical and fracture properties of the nanocomposites are first estimated by a mean-field homogenisation approach. Inhomogeneous dispersion of CNTs is accounted for by means of equivalent inclusions representing agglomerated CNTs. Detailed parametric analyses are presented to assess the effect of the main micromechanical properties upon the fracture behaviour of CNT-based composites. The second step of the proposed approach incorporates the previously estimated constitutive properties into a phase field fracture model to simulate crack initiation and growth in CNT-based composites. The modelling capabilities of the framework presented is demonstrated through three paradigmatic case studies involving mode I and mixed mode fracture conditions.

 

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