{
  "abstract": "The fundamental competition between crack-tip cleavage and dislocation emission dictates the ductile-to-brittle transition in crystalline solids. In hydrogen-charged environments, this delicate balance is disrupted, yet existing models often struggle to self-consistently capture the atomic-scale thermomechanical modulation of the emission barrier. Here, we propose the hydrogen-informed Rice-Beltz framework to quantify the critical stress intensity factors (SIFs) required for initial dislocation nucleation under mixed-mode (I+II) loading. By integrating the elastic interaction of the dilatational field of interstitial hydrogen and the applied stress fields against the incipient dislocation core, the model recovers the non-monotonic relation between the most probable SIF and the hydrogen concentration. Unlike the classical pure mode-I (or mode-II) scenario, the minimization of the local strain energy density is employed to generate closed-form nominal driving forces, which are subsequently embedded into a transition-state-theory framework. This atomistically-informed approach yields the most probable SIF for the first dislocation emission event as a function of the loading rate, slip angle, and hydrogen concentration, providing a rigorous, parameter-free boundary condition for the onset of hydrogen-modulated crack-tip plasticity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: K. Zhao Mechanics of Materials 223 (2026) 105876",
  "arxiv": "2609.30776",
  "author_total": 1,
  "authors": [
    {
      "name": "Kai Zhao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8zj6x3z4tvpck.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.30776",
  "fulltext_url": null,
  "id": "8zj6x3z4tvpck",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.30776",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "physics.app-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.30776",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8zj6x3z4tvpck.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:52Z",
      "native_id": "2609.30776",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.30776"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "A hydrogen-informed Rice-Beltz model for crack-tip dislocation emission under mixed-mode loading",
  "title_text": "A hydrogen-informed Rice-Beltz model for crack-tip dislocation emission under mixed-mode loading",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:52Z",
  "url": "https://research.draconitic.com/paper/8zj6x3z4tvpck",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.mechmat.2026.105876",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}