{
  "abstract": "This study experimentally evaluates how various 3D-printed gyroid core materials influence the mechanical and thermo-mechanical performance of lightweight carbon-fiber-reinforced polymer (CFRP) sandwich structures. Three gyroid core configurations were considered: short-carbon-fiber-reinforced polyphthalamide (PPA-CF), continuous-carbon-fiber-reinforced nylon (ONYX-R), and nylon short-carbon-fiber-reinforced (ONYX), all combined with similar 0/90° carbon-fiber-reinforced polymer composite (CFRP) face sheets. The sandwich specimens were manufactured using a one-step co-curing process and characterized by flatwise compression, three-point bending, and dynamic mechanical analysis (DMA). The PPA-CF-CFRP sandwich configuration exhibited the highest flexural performance, with a maximum flexural stress of 148–156 MPa, approximately 39% higher than that of ONYX-R-CFRP, and the highest mean compression modulus of approximately 87 MPa. However, ONYX-R-CFRP achieved the highest mean compressive strength of 12.84 MPa, compared with 11.85 MPa for PPA-CF-CFRP. These findings indicate that the mechanical response depends on the loading mode and is influenced by the combined effects of the thermoplastic matrix, carbon-fiber reinforcement architecture, and the resulting structural characteristics of the printed gyroid cores. DMA revealed that the PPA-CF-CFRP sandwich achieved a storage modulus of ~9 GPa at 30 °C, outperforming the ONYX-R-CFRP configuration by approximately 70%. Conversely, ONYX-R-CFRP exhibited the highest damping capacity, with a maximum tan δ of approximately 0.16, about 60% higher than the PPA-CF-CFRP configuration. The ONYX-CFRP sandwich configuration displayed the lowest mechanical and thermo-mechanical performance, demonstrating that the stiffness, deformation capacity, damping response, and temperature-dependent mechanical behavior of these sandwich structures can be tailored through the selection of the additively manufactured core configuration.",
  "abstract_shown": true,
  "affiliations": [
    "Composite Materials Laboratory for Aeronautical Field, Romanian Research & Development Institute for Gas Turbines—COMOTI, 220D Iuliu Maniu Av., 061126 Bucharest, Romania",
    "Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Alexandru Ciubotariu"
    },
    {
      "affs": [
        0
      ],
      "name": "Teodor-Adrian Badea",
      "orcid": "0000-0002-7772-1207"
    },
    {
      "affs": [
        0
      ],
      "name": "Madalina Mustareata"
    },
    {
      "affs": [
        0
      ],
      "name": "Raluca Maier",
      "orcid": "0000-0001-6792-4425"
    },
    {
      "affs": [
        0
      ],
      "name": "Andrei Timonia"
    },
    {
      "affs": [
        0
      ],
      "name": "Vlad Buga"
    },
    {
      "affs": [
        0
      ],
      "name": "Laurentiu Petre"
    },
    {
      "affs": [
        1
      ],
      "name": "Ciprian Ionuț Morăraș",
      "orcid": "0000-0001-6300-2255"
    },
    {
      "affs": [
        1
      ],
      "name": "Viorel Goanță",
      "orcid": "0000-0002-1693-5076"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1jzwwzw3rwazx.bib",
  "cited_by": 0,
  "doi": "10.3390/polym18202510",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13709308/?tool=EBI",
  "id": "1jzwwzw3rwazx",
  "issns": [
    "2073-4360"
  ],
  "landing_url": "https://www.mdpi.com/2073-4360/18/20/2510",
  "language": "eng",
  "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": [
    [
      "openalex",
      "2210|Cellular and Composite Structures"
    ]
  ],
  "openalex": "W7221760782",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13709308/pdf/?tool=EBI",
  "pmcid": "PMC13709308",
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/1jzwwzw3rwazx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:44Z",
      "native_id": "10.3390/polym18202510",
      "source": "crossref",
      "url": "https://www.mdpi.com/2073-4360/18/20/2510"
    },
    {
      "first_seen": "2026-10-30T12:21:34Z",
      "native_id": "PMC:PMC13709308",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13709308"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:2073-4360",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Mechanical and Thermomechanical Performance Evaluation of CFRP Sandwich Structures with Additively Manufactured Composite Cores",
  "title_text": "Mechanical and Thermomechanical Performance Evaluation of CFRP Sandwich Structures with Additively Manufactured Composite Cores",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:34Z",
  "url": "https://research.draconitic.com/paper/1jzwwzw3rwazx",
  "venue": "Polymers",
  "versions": []
}