Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ijsolstr.2006.08.005
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dc.titlePressure-sensitive ductile layers - I. Modeling the growth of extensive damage
dc.contributor.authorChew, H.B.
dc.contributor.authorGuo, T.F.
dc.contributor.authorCheng, L.
dc.date.accessioned2014-06-17T06:31:35Z
dc.date.available2014-06-17T06:31:35Z
dc.date.issued2007-04
dc.identifier.citationChew, H.B., Guo, T.F., Cheng, L. (2007-04). Pressure-sensitive ductile layers - I. Modeling the growth of extensive damage. International Journal of Solids and Structures 44 (7-8) : 2553-2570. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijsolstr.2006.08.005
dc.identifier.issn00207683
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/61148
dc.description.abstractPolymeric adhesives sandwiched between two elastic substrates are commonly found in multi-layers and IC packages. The non-elastic deformation and flow stress of such adhesive joints are highly pressure-sensitive. In this work, we study the effects of pressure-sensitivity, α, and plastic dilatancy, β, on void growth and coalescence ahead of a crack in ductile adhesive joints. To this end, a single layer of discrete voids is placed ahead of the crack in a pressure-sensitive dilatant adhesive sandwiched between two elastic substrates. The adhesive joint is subjected to small-scale yielding conditions. Using an associated flow rule (α = β), we show that pressure-sensitivity not only intensifies damage levels but also increases its spatial extent several fold. The damage level as well as its spatial extent is found to be even greater when a non-associated flow rule (β < α) is deployed. A reduction in the damage process zone's thickness further increases the voiding activity in the adhesive, thereby resulting in brittle-like failure. This work also examines the fracture toughness trends using a material failure criterion for crack growth. © 2006 Elsevier Ltd. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.ijsolstr.2006.08.005
dc.sourceScopus
dc.subjectDiscrete voids
dc.subjectPlastic dilatancy
dc.subjectPolymers
dc.subjectPressure-sensitive yielding
dc.subjectVoid growth
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE AND ENGINEERING
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1016/j.ijsolstr.2006.08.005
dc.description.sourcetitleInternational Journal of Solids and Structures
dc.description.volume44
dc.description.issue7-8
dc.description.page2553-2570
dc.identifier.isiut000245022200027
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