{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T13:52:34Z","timestamp":1774878754717,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2023,6,8]],"date-time":"2023-06-08T00:00:00Z","timestamp":1686182400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Fundo Europeu de Desenvolvimento Regional (FEDER)","award":["(MOSHO) NORTE-01-0247-FEDER-033796"],"award-info":[{"award-number":["(MOSHO) NORTE-01-0247-FEDER-033796"]}]},{"name":"Solu\u00e7\u00f5es avan\u00e7adas para materiais de impacto, repara\u00e7\u00e3o de aeroestruturas em comp\u00f3sito e sua monitoriza\u00e7\u00e3o","award":["(MOSHO) NORTE-01-0247-FEDER-033796"],"award-info":[{"award-number":["(MOSHO) NORTE-01-0247-FEDER-033796"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>In this work, the fracture behaviour of repaired honeycomb\/carbon\u2013epoxy sandwich panels under edgewise compression and three-point bending loading was analysed. Assuming the occurrence of damage resulting from a complete perforation leading to an open hole, the followed repair strategy consists of plug filling the core hole and considering two scarf patches with an angle of 10\u00b0 in order to repair the damaged skins. Experimental tests were performed on undamaged and repaired situations in order to address the alteration in the failure modes and assess the repair efficiency. It was observed that repair recovers a large part of the mechanical properties of the corresponding undamaged case. Additionally, a three-dimensional finite element analysis incorporating a mixed-mode I + II + III cohesive zone model was performed for the repaired cases. Cohesive elements were considered in the several critical regions prone to damage development. The failure modes and the resultant load\u2013displacement curves obtained numerically were compared with the experimental ones. It was concluded that the numerical model is suitable for estimating the fracture behaviour of sandwich panel repairs.<\/jats:p>","DOI":"10.3390\/ma16124249","type":"journal-article","created":{"date-parts":[[2023,6,8]],"date-time":"2023-06-08T03:29:48Z","timestamp":1686194988000},"page":"4249","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Edgewise Compression and Three-Point Bending Analyses of Repaired Composite Sandwich Panels"],"prefix":"10.3390","volume":"16","author":[{"given":"Ricardo J. B.","family":"Rocha","sequence":"first","affiliation":[{"name":"INEGI\u2014Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2151-3759","authenticated-orcid":false,"given":"Marcelo F. S. F.","family":"de Moura","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Mec\u00e2nica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"given":"Raul D. F.","family":"Moreira","sequence":"additional","affiliation":[{"name":"INEGI\u2014Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465 Porto, Portugal"},{"name":"Departamento de Engenharia Mec\u00e2nica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1080\/00218464.2014.900449","article-title":"Composite Repair in Wind Turbine Blades: An Overview","volume":"91","author":"Katnam","year":"2015","journal-title":"J. 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Part B Eng."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/12\/4249\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T19:50:39Z","timestamp":1760125839000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/16\/12\/4249"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,6,8]]},"references-count":22,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2023,6]]}},"alternative-id":["ma16124249"],"URL":"https:\/\/doi.org\/10.3390\/ma16124249","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,6,8]]}}}