{
  "abstract": "Multilayer composites are often found in industrial applications where pre-impregnated (pre-preg) and laminated plies are stacked and hot pressed. Along this process, the B-stage resin within pre-pregs cures and shrinks, generating residual stresses in the assembly which need to be quantified. The B-stage resin in pre-preg is seldom available, preventing the characterization of its shrinkage strain. Existing methods enable to identify the in-plane effective shrinkage of pre-impregnated lamina, based on the warpage measurements of a bilayer assembly assuming homogeneous thickness of layers. An extension is proposed to estimate the apparent shrinkage strain of the B-stage resin. A difficulty originates from heterogeneous properties across the bilayer. Indeed, the hot pressing induces a local variation in the resin volume fraction due to the resin flow. These fluctuations in thermomechanical behavior and effective shrinkage strain of the lamina are quantified, as a function of the ply thickness, by a two-scale homogenization method. By considering the thickness-dependent behavior of the pre-preg, the experimental warpage of the bilayer is modeled and recovered accurately through the estimation of the apparent shrinkage strain of the resin. As a direct outcome, the effective process-induced shrinkage components are determined even in the out-of-plane direction through numerical homogenization.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "name": "Mickaël Leicht"
    },
    {
      "name": "Gautier Girard"
    },
    {
      "name": "Norman Mathieu"
    },
    {
      "name": "Baptiste Arati"
    },
    {
      "name": "Aymeric Lagadec"
    },
    {
      "name": "Fabio Coccetti"
    },
    {
      "name": "Sébastien Mercier"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a3m04qtz9rvgv.bib",
  "cited_by": 0,
  "doi": "10.1016/j.compositesa.2026.110304",
  "fulltext_url": null,
  "id": "a3m04qtz9rvgv",
  "issns": [
    "1359-835X"
  ],
  "landing_url": "https://hal.science/hal-05776659v1",
  "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",
      "0.spi"
    ],
    [
      "hal",
      "1.phys.meca"
    ],
    [
      "hal",
      "1.spi.mat"
    ],
    [
      "hal",
      "2.phys.meca.msmeca"
    ],
    [
      "openalex",
      "2211|Composite Material Mechanics"
    ]
  ],
  "openalex": "W7214440968",
  "pdf_url": "https://hal.science/hal-05776659/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/a3m04qtz9rvgv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:46Z",
      "native_id": "hal-05776659",
      "source": "hal",
      "url": "https://hal.science/hal-05776659v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Inverse identification of process-induced shrinkage strain for a B-stage thermoset resin in woven pre-impregnated lamina via warpage analysis",
  "title_text": "Inverse identification of process-induced shrinkage strain for a B-stage thermoset resin in woven pre-impregnated lamina via warpage analysis",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:46Z",
  "url": "https://research.draconitic.com/paper/a3m04qtz9rvgv",
  "venue": "Composites Part A: Applied Science and Manufacturing",
  "versions": []
}