Mechanical Properties and Failure Analysis of Cellular Core Sandwich Panels

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dc.contributor.authorShah, Uditen
dc.contributor.committeechairKapania, Rakesh K.en
dc.contributor.committeememberPhilen, Michael Keithen
dc.contributor.committeememberPatil, Mayuresh J.en
dc.contributor.departmentAerospace and Ocean Engineeringen
dc.date.accessioned2018-01-11T09:00:16Zen
dc.date.available2018-01-11T09:00:16Zen
dc.date.issued2018-01-10en
dc.description.abstractSandwich Panels with cellular cores are widely used in the aerospace industry for their higher stiffness to mass, strength to mass ratio, and excellent energy absorption capability. Even though, sandwich panels are considered state of the art for lightweight aerospace structures, the requirement to further reduce the mass exists due to the direct impact of mass on mission costs. Traditional manufacturing techniques have limited the shape of the cores to be either hexagonal or rectangular, but, with rapid advancements in additive manufacturing, other core shapes can now be explored. This research aims to identify and evaluate the mechanical performance of two-dimensional cores having standard wall geometry, which provide higher specific stiffness than honeycomb cores. Triangular cores were identified to have higher specific in-plane moduli and equivalent specific out-of-plane and transverse shear moduli. To consider practical use of the triangular cores, elastic and elastic-plastic structural analysis was performed to evaluate the stiffness, strength, failure, and energy absorption characteristics of both the core and sandwich panels. The comparison made between triangular cores and hexagonal cores having the same cell size and relative density showed that triangular cores outperform hexagonal cores in elastic range and for applications where in-plane loading is dominant. Triangular cores also have excellent in-plane energy absorption capabilities at higher densities.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:14049en
dc.identifier.urihttp://hdl.handle.net/10919/81699en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectHoneycomb Sandwich Panelsen
dc.subjectCellular Coresen
dc.subjectTriangular Coreen
dc.subjectAuxeticen
dc.subjectImpacten
dc.subjectFailureen
dc.subjectFinite element methoden
dc.titleMechanical Properties and Failure Analysis of Cellular Core Sandwich Panelsen
dc.typeThesisen
thesis.degree.disciplineAerospace Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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