{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T19:12:19Z","timestamp":1770577939229,"version":"3.49.0"},"reference-count":36,"publisher":"SAGE Publications","issue":"18","license":[{"start":{"date-parts":[[2013,7,23]],"date-time":"2013-07-23T00:00:00Z","timestamp":1374537600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Composite Materials"],"published-print":{"date-parts":[[2014,8]]},"abstract":"<jats:p> This paper presents experimental and analytical investigations about the creep behaviour of sandwich panels comprising glass-fibre reinforced polymer faces and rigid polyurethane foam core for civil engineering applications. A full-scale sandwich panel was tested in bending for a period of 3600\u2009h, in a simply supported configuration, subjected to a uniformly distributed load corresponding to 20% of the panel\u2019s flexural strength. Additionally, specimens of polyurethane foam core were tested in shear for a period of 1200\u2009h, for three different load levels corresponding to 10%, 20% and 30% of the foam\u2019s shear strength. Experimental results were fitted using Findley\u2019s power law formulation. Creep coefficients, shear modulus reduction factors and time-dependent shear moduli were obtained for the polyurethane foam in shear. A composed creep model is proposed to simulate the sandwich panel\u2019s long-term creep deformations by considering the individual viscoelastic contributions from (1) the core material in shear and (2) the glass-fibre reinforced polymer faces in tension\/compression. The composed creep model predictions adequately reproduced the full-scale panel\u2019s experimental results. In addition, a good agreement was found between the composed creep model predictions and the extrapolation of the power law fitting obtained from the full-scale panel test, for a 50-year period. <\/jats:p>","DOI":"10.1177\/0021998313496593","type":"journal-article","created":{"date-parts":[[2013,7,24]],"date-time":"2013-07-24T16:37:10Z","timestamp":1374683830000},"page":"2237-2249","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":29,"title":["Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling"],"prefix":"10.1177","volume":"48","author":[{"given":"M\u00e1rio","family":"Garrido","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Architecture and Georesources, Instituto Superior T\u00e9cnico \/ ICIST, Technical University of Lisbon, Lisbon, Portugal"}]},{"given":"Jo\u00e3o R","family":"Correia","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Architecture and Georesources, Instituto Superior T\u00e9cnico \/ ICIST, Technical University of Lisbon, Lisbon, Portugal"}]},{"given":"Fernando A","family":"Branco","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Architecture and Georesources, Instituto Superior T\u00e9cnico \/ ICIST, Technical University of Lisbon, Lisbon, Portugal"}]},{"given":"Thomas","family":"Keller","sequence":"additional","affiliation":[{"name":"Composite Construction Laboratory, \u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne, Lausanne, Switzerland"}]}],"member":"179","published-online":{"date-parts":[[2013,7,23]]},"reference":[{"key":"bibr1-0021998313496593","doi-asserted-by":"publisher","DOI":"10.1002\/9780470690253"},{"key":"bibr2-0021998313496593","unstructured":"Zenkert D. 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