Micromechanics-based phase field fracture modelling of CNT composites Quinteros, Leonel García Macías, Enrique Carbon nanotubes Composite materials Crack propagation Finite Element Analysis Fracture toughness Micromechanics Phase field L. Quinteros acknowledges financial support from the National Agency for Research and Development (ANID) , Chile/Scholarship Pro-gram/DOCTORADO BECAS CHILE/2020-72210161. E. Martinez-Paneda was supported by an UKRI Future Leaders Fellowship, UK (grant MR/V024124/1) . 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. 2022-05-31T07:12:56Z 2022-05-31T07:12:56Z 2022-03-12 journal article Leonel Quinteros, Enrique García-Macías, Emilio Martínez-Pañeda, Micromechanics-based phase field fracture modelling of CNT composites, Composites Part B: Engineering, Volume 236, 2022, 109788, ISSN 1359-8368, [https://doi.org/10.1016/j.compositesb.2022.109788] http://hdl.handle.net/10481/75121 10.1016/j.compositesb.2022.109788 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Elsevier