2026-04-14T06:18:22Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/260472025-02-04T00:07:01Zcom_2072_452955com_2072_2054col_2072_453061

2025-02-04T00:07:01Z urn:hdl:10256/26047 On how unsymmetrical laminate designs with tailored ply clusters affect compression after impact strength compared to symmetric baseline Sasikumar, Aravind García Rodríguez, Santiago Arbeláez Toro, Juan José Trias Mansilla, Daniel Costa i Balanzat, Josep Assaigs de materials Materials -- Testing Materials compostos -- Deslaminatge Composite materials -- Delamination Mecànica de fractura Fracture mechanics Materials laminats Laminated materials Out-of-plane loads induce unsymmetrical damage modes in the laminate thickness direction. Consequently, the authors have recently proposed overcoming the conventional laminate symmetry constraint by designing unsymmetrical laminates with zero coupling responses. While impact damage is able to be tailored with unsymmetrical laminates, comparing them to symmetric laminates and assessing their impact damage tolerances had yet to be addressed. In this paper, we study three unsymmetrical laminates with localized ply clusters positioned at different locations (at the impacted, at the middle and at the non-impacted sides), along with a standard symmetric laminate as a baseline. Using low-velocity impact, X-ray micro-computed tomography and compression after impact (CAI), we compared the impact and post-impact responses to understand the effect local ply clusters and the delamination location have on the CAI strength. Results revealed that the unsymmetrical laminate with the ply clusters in the middle, where the dominant delaminations also occured, improved the CAI strength by a maximum of 10% when compared to the symmetric baseline. Laminates with delaminations at the outer surfaces offered lesser resistance to buckling. While our study demonstrates that symmetric laminates are not the optimal damage tolerant solution for impact load cases, it also evidences the feasibility of unsymmetrical laminates The first author would like to thank the Generalitat de Catalunya for the FI-DGR pre-doctoral grant (2018 FI-B2 00118). The authors would like to thank the Spanish Ministerio de Ciencia, Innovacíon y Universidades for the grants coded RTI2018-097880-B-I00 and RTI2018-099373-B-I00 2025-02-04T00:07:01Z 2025-02-04T00:07:01Z 2020-04-15 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion peer-reviewed http://hdl.handle.net/10256/26047 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.compstruct.2020.111958 info:eu-repo/semantics/altIdentifier/issn/0263-8223 info:eu-repo/semantics/altIdentifier/eissn/1879-1085 RTI2018-097880-B-I00 RTI2018-099373-B-I00 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097880-B-I00/ES/MEJORA DE LA TENACIDAD TRANSLAMINAR DE MATERIALES COMPUESTOS MEDIANTE NUEVAS ESTRATEGIAS DE HIBRIDACION/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099373-B-I00/ES/DESARROLLO DE UNA METODOLOGIA CONFIABLE PARA EL DISEÑO EFICIENTE I RENTABLE DE UNIONES ADHESIVAS BAJO DIFERENTES CONDICIONES DE CARGA Y AMBIENTALES/ Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0 info:eu-repo/semantics/openAccess Elsevier © Composite Structures, 2020, vol. 238, art.núm.111958 Articles publicats (D-EMCI) Sasikumar, Aravind García Rodríguez, Santiago Arbeláez Toro, Juan José rias Mansilla, Daniel Costa i Balanzat, Josep 2020 On how unsymmetrical laminate designs with tailored ply clusters affect compression after impact strength compared to symmetric baseline Composite Structures 238 art.núm.111958