Brittle to Ductile Fracture Behavior of Isotropic Power-Law and Sigmoidal Hardening Porous Solids Using XFEM Method

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dc.contributor.advisorJoshi, Shailendra P.
dc.contributor.committeeMemberKulkarni, Yashashree
dc.contributor.committeeMemberNakshatrala, Kalyana Babu
dc.creatorNabaa, Ali
dc.date.accessioned2019-11-07T03:53:51Z
dc.date.createdAugust 2019
dc.date.issued2019-08
dc.date.submittedAugust 2019
dc.date.updated2019-11-07T03:53:52Z
dc.description.abstractIn order to achieve a better understanding of void growth behavior in materials, extensive experimental work was done and unit cell calculations were carried out by researchers. However, these approaches didn’t take into account the cracking that characterizes the post coalescence response of materials. This paper presents axisymmetric unit cell calculations with the possibility of cracking for isotropic materials exhibiting power law and sigmoidal hardening responses. The analysis is based on the XFEM enrichment of a quasistatically deforming unit cell under tensile loading with triaxiality held constant. The influence of the intrinsic initial porosity, surface energy, yield stress, triaxial stresses, hardening exponent, twinning, initial void shape, etc. on the competition between microscopic fracture mechanisms was studied. The results proved that cracking plays an important role in determining the onset of damage.
dc.description.departmentMechanical Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10657/5309
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectDuctility
dc.subjectVoids
dc.subjectEmbrittlement
dc.subjectXFEM
dc.subjectMetals
dc.titleBrittle to Ductile Fracture Behavior of Isotropic Power-Law and Sigmoidal Hardening Porous Solids Using XFEM Method
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2021-08-01
local.embargo.terms2021-08-01
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentMechanical Engineering
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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