Fractured surfaces of epoxy adhesives and fractals under mode I loading (2nd Report, Fatigue crack growth properties and fractal dimensions)

Kimiyoshi Naito; Toru Fujii

doi:10.1299/kikaia.63.893

Fractured surfaces of epoxy adhesives and fractals under mode I loading (2nd Report, Fatigue crack growth properties and fractal dimensions)

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of rubber modification and adhesive thickness on the fatigue-fractured surfaces of epoxy adhesives under mode I cyclic loading were examined using fractals. When the energy release rate range, ΔG_I is higher than 100 J/m² the fractal dimension of fractured surfaces becomes high due to rubber modification under the same ΔG_I. The fractal dimension decreases with increasing fatigue crack growth rate, da/dN. A relationship is given by the following equation between the parameter, S (= da/dN×ΔG_I) and the fractal dimension, D for unmodified and rubber-modified adhesives. log S = log(da/dN·ΔG_I) = α₄·D+β₄ where α₄ and β₄ are experimental constants. Whether the adhesives contain rubber particles or not, the fractal dimension as well as the da/dN-ΔG_I relation is little affected by adhesive thickness.

Original language	English
Pages (from-to)	893-900
Number of pages	8
Journal	Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	63
Issue number	609
DOIs	https://doi.org/10.1299/kikaia.63.893
Publication status	Published - 1997
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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Fractured surfaces of epoxy adhesives and fractals under mode I loading (2nd Report, Fatigue crack growth properties and fractal dimensions). / Naito, Kimiyoshi; Fujii, Toru.

In: Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 63, No. 609, 1997, p. 893-900.

Research output: Contribution to journal › Article › peer-review

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Fractured surfaces of epoxy adhesives and fractals under mode I loading (2nd Report, Fatigue crack growth properties and fractal dimensions)

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