Influence of simple shear and void clustering on void coalescence

dc.contributor.advisorChen, Z.
dc.contributor.authorRahman, Mohammad Atiqur
dc.date.accessioned2023-03-01T16:17:15Z
dc.date.available2023-03-01T16:17:15Z
dc.date.issued2012
dc.date.updated2020-07-23T00:00:00Z
dc.description.abstractThe fracture of porous ductile materials subjected to simple shear loading is numerically investigated using three-dimensional unit cells containing voids of various shapes and lengths of the inter-void ligament. In shear loading, the porosity reduction is limited while the void rotates and elongates within the shear band. The strain at coalescence was revealed to be strongly related to the initial void spacing and void shape. Initially prolate voids are particularly prone to shear coalescence while initially oblate voids are most resistant to shear failure. To investigate the localization effect within three-void clusters during void coalescence, tensile tests and finite element simulations of drilled hole samples are performed by varying cluster orientations with respect to applied loading and hole spacing ratios. The experimental and numerical results revealed that material ductility is significantly decreased with increasing hole spacing ratios for certain cluster orientation. The existing coalescence models over estimate the coalescence strains for the considered three-void cluster.
dc.description.copyright© Mohammad A. Rahman, 2012
dc.description.noteScanned from archival print submission.
dc.formattext/xml
dc.format.extentxiii, 122 pages
dc.format.mediumelectronic
dc.identifier.otherThesis 9055
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/13321
dc.language.isoen_CA
dc.publisherUniversity of New Brunswick
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.disciplineMechanical Engineering
dc.titleInfluence of simple shear and void clustering on void coalescence
dc.typemaster thesis
thesis.degree.disciplineMechanical Engineering
thesis.degree.fullnameMaster of Science in Engineering
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelmasters
thesis.degree.nameM.Sc.E.

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