{
  "abstract": "The interaction between dislocations and cracks plays a central role in the fracture resistance of crystalline materials. However, capturing this coupling across multiple spatial scales remains a major challenge. In this work, we develop a mesoscale modeling framework coupling Discrete Dislocation Dynamics (DDD) with a phase-field formulation of fracture. The coupling is achieved through a non-singular Nye tensor representation of dislocations and solved using an FFT-based spectral method. The proposed framework provides a consistent description of the elastic fields generated by dislocations and their influence on crack-driving forces, while avoiding the residual-stress artifacts commonly associated with eigenstrain-based formulations. The simulations demonstrate that increasing dislocation density enhances elastic shielding at the crack tip, thereby delaying crack propagation and stabilizing intermediate crack-equilibrium states that are absent in purely brittle configurations. Higher dislocation densities also promote more progressive fracture responses associated with enhanced plastic relaxation and dislocation-induced shielding effects, anisotropic crack propagation, and local crack-path deviations depending on the evolving dislocation microstructure. These results demonstrate the ability of the proposed framework to capture key mechanisms governing crack–dislocation interactions and provide new insight into the role of plasticity in fracture resistance. More broadly, the methodology establishes a foundation for further multiscale investigations of failure in crystalline materials, with potential applications to fatigue and toughness optimization.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Luis Eon"
    },
    {
      "name": "Riccardo Gatti"
    },
    {
      "name": "Benoît Appolaire"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4awyhd65vt52q.bib",
  "cited_by": 0,
  "doi": "10.1016/j.jmps.2026.106877",
  "fulltext_url": null,
  "id": "4awyhd65vt52q",
  "issns": [
    "0022-5096"
  ],
  "landing_url": "https://hal.science/hal-05847330v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.meca"
    ],
    [
      "hal",
      "2.phys.meca.mema"
    ],
    [
      "openalex",
      "2211|Numerical methods in engineering"
    ]
  ],
  "openalex": "W7221778327",
  "pdf_url": "https://hal.science/hal-05847330/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/4awyhd65vt52q.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:20:44Z",
      "native_id": "hal-05847330",
      "source": "hal",
      "url": "https://hal.science/hal-05847330v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Coupled Phase-Field Fracture and Discrete Dislocation Dynamics for Short-Crack Propagation",
  "title_text": "Coupled Phase-Field Fracture and Discrete Dislocation Dynamics for Short-Crack Propagation",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T12:20:44Z",
  "url": "https://research.draconitic.com/paper/4awyhd65vt52q",
  "venue": "Journal of the Mechanics and Physics of Solids",
  "versions": []
}