FATIGUE-FRACTURED SURFACES OF EPOXY ADHESIVES AND FRACTALS UNDER MODE-I CYCLIC LOADING

Authors
Citation
K. Naito et T. Fujii, FATIGUE-FRACTURED SURFACES OF EPOXY ADHESIVES AND FRACTALS UNDER MODE-I CYCLIC LOADING, JSME international journal. Series A, Solid mechanics and material engineering, 41(3), 1998, pp. 380-388
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering, Mechanical","Material Science
ISSN journal
1344-7912
Volume
41
Issue
3
Year of publication
1998
Pages
380 - 388
Database
ISI
SICI code
1344-7912(1998)41:3<380:FSOEAA>2.0.ZU;2-X
Abstract
The effects of rubber modification and adhesive thickness on the fatig ue-fractured surfaces of epoxy adhesives under mode I cyclic loading w ere examined using fractals. When the energy release rate range, Delta G(I), is higher than 100 J/m(2), the fractal dimension of fractured s urfaces becomes high due to rubber modification. The fractal dimension decreases with increasing fatigue crack growth rate, da/dN. The follo wing equation shows the relationship between parameter S(=da/dN . Delt a G(1)) and fractal dimension D for unmodified and rubber-modified adh esives. log S = log(da/dN . Delta G(I)) = alpha(4) . D + beta(4) Here, alpha(4) and beta(4) are experimental constants. Regardless of whethe r the adhesives contain rubber particles or not, the fractal dimension as well as the da/dN-Delta G(I) relation is little affected by adhesi ve thickness.