Numerical analysis of notch-tip fields in rubber-modified epoxies

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dc.contributor.author Al-Abduljabbar, A. en_US
dc.contributor.author Pan, Jwo en_US
dc.date.accessioned 2006-04-19T13:39:08Z
dc.date.available 2006-04-19T13:39:08Z
dc.date.issued 1999-04 en_US
dc.identifier.citation Al-Abduljabbar, A.; Pan, J. (1999)."Numerical analysis of notch-tip fields in rubber-modified epoxies." Polymer Engineering & Science 39(4): 662-675. <http://hdl.handle.net/2027.42/34542> en_US
dc.identifier.issn 0032-3888 en_US
dc.identifier.issn 1548-2634 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/34542
dc.description.abstract In this work, the near-tip fields in notched specimens of pressure-sensitive nonporous and porous materials are investigated by finite element analysis. The specimen geometry and material properties are adopted from the corresponding experiments on rubber-modified epoxies. The Drucker-Prager yield criterion is first used to describe the yielding of nonporous materials. The yielding behavior of porous materials is based on a generalized Gurson yield criterion. The yield criterion for porous materials accounts for both the matrix material pressure sensitivity and the macroscopic pressure sensitivity due to porosity. Modifications are made on the yield criterion under negative mean stresses in order to account for the specific loading and geometry of the specimen. The computational results are compared with observed experimental cavitation zones and intense shear zones near the notch tip in specimens. Moreover, the near-tip fields and crack initiation sites ahead of the notch tip related to the volume fraction of rubber particles are investigated. The computational results suggest that the lowering of the mean stress ahead of the tip in rubber-modified epoxies with higher volume fractions of rubber changes the fracture mode from being controlled by high mean stresses at the elastic-plastic boundary to being controlled by large plastic strains closer to the notch tip. en_US
dc.format.extent 1397214 bytes
dc.format.extent 3118 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language.iso en_US
dc.publisher Wiley Subscription Services, Inc., A Wiley Company en_US
dc.subject.other Chemistry en_US
dc.subject.other Chemical Engineering en_US
dc.title Numerical analysis of notch-tip fields in rubber-modified epoxies en_US
dc.type Article en_US
dc.rights.robots IndexNoFollow en_US
dc.subject.hlbsecondlevel Materials Science and Engineering en_US
dc.subject.hlbtoplevel Engineering en_US
dc.description.peerreviewed Peer Reviewed en_US
dc.contributor.affiliationum Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, Michigan 48109 en_US
dc.contributor.affiliationum Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, Michigan 48109 en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/34542/1/11455_ftp.pdf en_US
dc.identifier.doi http://dx.doi.org/10.1002/pen.11455 en_US
dc.identifier.source Polymer Engineering & Science en_US
dc.owningcollname Interdisciplinary and Peer-Reviewed
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