{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T05:04:22Z","timestamp":1784091862002,"version":"3.55.0"},"reference-count":29,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T00:00:00Z","timestamp":1783900800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Department of Scientific Research Projects","award":["23PEDAP19001"],"award-info":[{"award-number":["23PEDAP19001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>This study comprehensively investigates the thermal and mechanical degradation behavior of molded glass-fiber-reinforced plastic (GFRP) grating composites subjected to temperatures ranging from 80 \u00b0C to 320 \u00b0C. Three types of industrially produced GFRP gratings\u2014open-type (OG), thin closed-skin (CG), and thick closed-skin (TCG)\u2014were evaluated using mechanical, microstructural, chemical, and crystallographic analyses. Three-point bending tests revealed that TCG-type specimens exhibited superior thermal resistance, experiencing only a 43.9% loss in strength at 320 \u00b0C, whereas OG-type specimens showed significant resin degradation, fiber\u2013matrix decomposition, and microcrack formation at temperatures above 200 \u00b0C. Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) analyses revealed significant resin degradation, fiber\u2013matrix decomposition, and microcrack formation. Thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC) confirmed substantial mass loss and structural disintegration at temperatures above 200 \u00b0C. Dynamic Mechanical Analysis (DMA) results revealed that the glass transition temperature (Tg) occurred at approximately 115\u2013120 \u00b0C. The second-order regression model developed to estimate flexural strength under increasing temperature provided high accuracy (R2 &gt; 0.99) for all grating types. It should be noted that this investigation focuses on the short-term thermo-mechanical response under fundamental flexural loading to provide an accurate baseline for preliminary engineering design. The findings emphasize that the effect of temperature should be considered a critical parameter in the structural design of GFRP systems, especially in industrial environments with temperatures above 120 \u00b0C. Accordingly, tables for material selection and load-carrying capacity should be recalibrated to account for short-term temperature effects.<\/jats:p>","DOI":"10.3390\/polym18141722","type":"journal-article","created":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T00:55:21Z","timestamp":1783990521000},"page":"1722","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Thermo-Mechanical Characterization of GFRP Molded Grating Composites Exposed to Elevated Temperatures"],"prefix":"10.3390","volume":"18","author":[{"given":"Emrah","family":"Madenci","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Necmettin Erbakan University, 42090 Konya, T\u00fcrkiye"},{"name":"Department of Technical Sciences, Western Caspian University, Baku 1001, Azerbaijan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0048-3439","authenticated-orcid":false,"given":"Muhammed \u0130hsan","family":"\u00d6zg\u00fcn","sequence":"additional","affiliation":[{"name":"Department of Metallurgy and Material Engineering, Necmettin Erbakan University, 42090 Konya, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ceyhun","family":"Aksoylu","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Konya Technical University, 42250 Konya, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9354-4784","authenticated-orcid":false,"given":"Yasin Onuralp","family":"\u00d6zk\u0131l\u0131\u00e7","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Necmettin Erbakan University, 42090 Konya, T\u00fcrkiye"},{"name":"Department of Unique Buildings and Constructions Engineering, Don State Technical University, Gagarin Sq. 1, 344003 Rostov-on-Don, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"314","DOI":"10.1016\/j.matpr.2020.11.669","article-title":"Review on glass fiber reinforced polymer composites","volume":"43","author":"Morampudi","year":"2021","journal-title":"Mater. 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