Spontaneous formation and morphology of telephone cord blisters in thin films: the Ω formulae

Simple item page
dc.contributor.authorYuan, Bo
dc.contributor.authorHarvey, Christopher M.
dc.contributor.authorThomson, Rachel C.
dc.contributor.authorCritchlow, Gary W.
dc.contributor.authorRickerby, David S.
dc.contributor.authorWang, Simon
dc.date.accessioned2020-01-30T12:33:01Z
dc.date.available2020-01-30T12:33:01Z
dc.date.issued2019-06-01
dc.description.abstractTelephone cord blisters (TCBs) are frequently observed in film/substrate material systems. They nucleate and propagate forward with wavy boundaries between the film and the substrate. The current study views the problem from a completely new angle: It is discovered that the spontaneous formation and morphology of TCBs in thin films under biaxial compressive residual stresses can be accurately explained and determined by assuming the existence of a pocket of energy concentration (PEC) instead of the existence of a separation of critical size. For the first time, completely-analytical formulae—the ‘Ω formulae’—are derived for the two local morphology parameters of TCBs of any shape, that is, width and height, and for the two global morphology parameters of TCBs of sinusoidal shape, that is, the wavelength and transverse amplitude. Mechanical conditions are also given for the first time for the formation of TCBs. Predictions for the four morphology parameters of the developed theory agree very well with extensive experimental results. In addition, by reversing the calculation, the residual stress and the film/substrate interface fracture toughness are also accurately determined from measurements of the TCB morphology parameters.en_UK
dc.identifier.citationYuan B, Harvey C, Thomson R, et al., (2019) Spontaneous formation and morphology of telephone cord blisters in thin films: the Ω formulae. Composite Structures, Volume 225, October 2019, Article number 111108en_UK
dc.identifier.issn0263-8223
dc.identifier.urihttps://doi.org/10.1016/j.compstruct.2019.111108
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15045
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectPockets of energy concentrationen_UK
dc.subjectResidual stressen_UK
dc.subjectFracture toughnessen_UK
dc.subjectTelephone cord blisteren_UK
dc.subjectThin filmsen_UK
dc.titleSpontaneous formation and morphology of telephone cord blisters in thin films: the Ω formulaeen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Spontaneous_formation_and_morphology_of_telephone_cord_blisters-2019.pdf
Size:
2.65 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)