Modelling the quasi-static flexural behaviour of composite sandwich structures with uniform- and graded-density foam cores

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dc.authorid0000-0002-6249-0565en_US
dc.contributor.authorLiu, Haibao
dc.contributor.authorLiu, Jun
dc.contributor.authorKaboğlu, Cihan
dc.contributor.authorZhou, Jin
dc.contributor.authorKong, Xiangshao
dc.contributor.authorLi, Shipeng
dc.contributor.authorBlackman, Bamber R. K.
dc.contributor.authorKinloch, Anthony J.
dc.contributor.authorDear, John P.
dc.date.accessioned2022-08-05T13:29:01Z
dc.date.available2022-08-05T13:29:01Z
dc.date.issued2021en_US
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümüen_US
dc.description.abstractIn-service, composite sandwich structures, which consist of fibre-composite skins (also termed face-sheets) adhesively bonded to a polymeric foam core, can encounter extreme quasi-static flexural loading that may cause serious damage to the sandwich structure. The ability to model the flexural behaviour of such structures can lead to improved designs and more efficient maintenance procedures. In the present research, a three-dimensional finite-element analysis (FEA) model is developed to predict the flexural behaviour of such sandwich structures using a commercial software package (i.e. Abaqus/Explicit). The high-fidelity FEA simulation combines an elastic-plastic (E-P) damage model of the composite skins together with a crushable foam-core damage model. The E-P damage model is implemented with a user subroutine to capture the damage, such as plastic deformation of the matrix and matrix cracking, fibre fracture and delamination cracking of the composite skins. The crushable foam model is used to predict (a) the mechanical response of the crushed foam core, (b) the induced damage from ductile fracture due to growth, coalescence and fracture of the cells and (c) the induced damage from shear fracture of the foam due to plastic shear-band localisation. Results from the modelling studies, such as the loading response and the damage mechanisms, are discussed and compared with the experimental results obtained from the sandwich structures manufactured with both uniform- and graded-density foam cores but which all have the same average core density. Good agreement is achieved between the experimental results and the predictions from the numerical modelling simulations.en_US
dc.identifier.doi10.1016/j.engfracmech.2021.108121en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12885/2036
dc.identifier.volume259en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.institutionauthorKaboğlu, Cihan
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofENGINEERING FRACTURE MECHANICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSandwich structuresen_US
dc.subjectFoam coreen_US
dc.subjectFlexural behaviouren_US
dc.subjectNumerical simulationen_US
dc.subjectDamage mechanismsen_US
dc.titleModelling the quasi-static flexural behaviour of composite sandwich structures with uniform- and graded-density foam coresen_US
dc.typeArticleen_US

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