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dc.contributor.authorSaseendran, Vishnu
dc.contributor.authorCarlsson, Leif A.
dc.contributor.authorBerggreen, Christian
dc.contributor.authorSeneviratne, Waruna P.
dc.date.accessioned2020-08-04T14:34:07Z
dc.date.available2020-08-04T14:34:07Z
dc.date.issued2020-12
dc.identifier.citationSaseendran, Vishnu; Carlsson, Leif A.; Berggreen, Christian; Seneviratne, Waruna P. 2020. Crack length correction and root rotation angle in a sandwich single cantilever beam (SCB) fracture specimen. International Journal of Lightweight Materials and Manufacture, vol. 3:no. 4:pp 426-434en_US
dc.identifier.issn2588-8404
dc.identifier.urihttps://doi.org/10.1016/j.ijlmm.2020.06.005
dc.identifier.urihttps://soar.wichita.edu/handle/10057/18880
dc.description© 2020 The Authors. Open access. Under a Creative Commons license.en_US
dc.description.abstractCrack root rotation is a measure of deviation from clamped boundary conditions of region in front of the crack tip. The root rotation depends on the shear force and bending moment acting at the crack tip. Such rotation significantly affects the compliance and energy-release rate. Crack root rotation analysis of Single Cantilever Beam (SCB) sandwich specimens is presented here. Closed-form solutions for the root rotation angle obtained from the foundation analysis are compared to finite element analysis (FEA) predictions. The derived expressions closely match for a range of sandwich configurations. An expression for the energy-release rate, derived from the foundation analysis was found to agree with FEA predictions over a large range of face-to-core modulus ratios. Energy-release rate and mode mixity phase angle increased with decreasing crack length due to the transverse shear effects. At longer crack lengths, both energy-release rate and phase angle reached a value independent of crack length. The foundation model is used to derive a simple expression for the offset crack length for the SCB sandwich fracture test. It is shown that the obtained formulation agrees closely well with both numerical and experimental values. In addition, SCB fracture tests performed using an in-house built translatable rig showed close relation to both analytical and numerical compliance results.en_US
dc.description.sponsorshipEUDP (Grant: 6410-0602 ) for the DTU part of this research is gratefully acknowledged. The second author's research has been supported by grants from FAA , NIA and ONR .en_US
dc.language.isoen_USen_US
dc.publisherKeAi Publishing Communications Ltden_US
dc.relation.ispartofseriesInternational Journal of Lightweight Materials and Manufacture;v.3:no.4
dc.subjectCompositesen_US
dc.subjectFace sheet/core interfaceen_US
dc.subjectMBTen_US
dc.subjectPhase angleen_US
dc.subjectRoot rotationen_US
dc.subjectSandwichen_US
dc.titleCrack length correction and root rotation angle in a sandwich single cantilever beam (SCB) fracture specimenen_US
dc.typeArticleen_US
dc.rights.holder© 2020 The Authorsen_US


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