Please use this identifier to cite or link to this item: https://doi.org/10.1007/s10704-005-2427-z
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dc.titleVapor pressure and residual stress effects on mixed mode toughness of an adhesive film
dc.contributor.authorChew, H.B.
dc.contributor.authorGuo, T.F.
dc.contributor.authorCheng, L.
dc.date.accessioned2014-06-17T06:37:50Z
dc.date.available2014-06-17T06:37:50Z
dc.date.issued2005-08
dc.identifier.citationChew, H.B., Guo, T.F., Cheng, L. (2005-08). Vapor pressure and residual stress effects on mixed mode toughness of an adhesive film. International Journal of Fracture 134 (3-4) : 349-368. ScholarBank@NUS Repository. https://doi.org/10.1007/s10704-005-2427-z
dc.identifier.issn03769429
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/61661
dc.description.abstractTemperature- and moisture- induced delamination leading to popcorn package cracking is a major package reliability issue for surface-mount plastic encapsulated microcircuits (PEM). Crack propagation along one of the interfaces of a ductile adhesive joining two elastic substrates is modeled to study interface delamination and toughness of PEMs. The polymeric adhesive is stressed by remote loading and residual stress. Along the crack front, the film-substrate interface is modeled by a strip of cells that incorporates vapor pressure effects on void growth and coalescence through a Gurson porous material relation. Results show that under high levels of vapor pressure, increasing film thickness will produce smaller enhancement on the steady-state fracture resistance of the interface, also referred to as the joint toughness. Across all mode mixity levels, vapor pressure effects dominate over residual stress. The adverse effects of vapor pressure are greatest in highly porous adhesives subjected to a strong mode II component. The latter is representative of the likely state of loading in IC packages since residual stress, resulting from the film-substrate thermal mismatch, induces a predominantly mode II component. © Springer 2005.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1007/s10704-005-2427-z
dc.sourceScopus
dc.subjectAdhesive
dc.subjectDamage
dc.subjectFracture toughness
dc.subjectPolymers
dc.subjectPorous material
dc.subjectVoid growth
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1007/s10704-005-2427-z
dc.description.sourcetitleInternational Journal of Fracture
dc.description.volume134
dc.description.issue3-4
dc.description.page349-368
dc.identifier.isiut000234143000009
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