{
  "abstract": "Frank elastic constants of associating rigid rodlike systems are investigated using a mean field theory combined with the Straley elastic free energy formalism. The aggregation equilibrium and orientational ordering are treated self-consistently to analyze the concentration and temperature dependences of the elastic constants. Both a monomer--dimer model and a fully polydisperse rodlike aggregate model are considered. We find that aggregation selectively enhances the bend elastic constant through the long-tail structure of the aggregate-size distribution. As a result, a pronounced elastic anisotropy, $K_{33}\\gg K_{11}>K_{22}$, emerges in the nematic phase. Decreasing temperature or increasing concentration promotes the formation of long rodlike aggregates and induces a rapid increase in the bend elastic constant, while the relation $K_{11}=3K_{22}$ remains unchanged. The exceptionally large bend elastic constants predicted here should be regarded as upper-bound estimates for the rigid-aggregate limit.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.05967",
  "author_total": 1,
  "authors": [
    {
      "name": "Akihiko Matsuyama"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aatgnsvftscve.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.05967",
  "fulltext_url": null,
  "id": "aatgnsvftscve",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.05967",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.soft"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.05967",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/aatgnsvftscve.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.05967",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.05967"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Frank Elastic Constants of Associating Rigid-Rodlike Systems",
  "title_text": "Frank Elastic Constants of Associating Rigid-Rodlike Systems",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:19Z",
  "url": "https://research.draconitic.com/paper/aatgnsvftscve",
  "venue": "arXiv",
  "versions": []
}