エポキシ系接着剤のモードI荷重下における接着破面とフラクタル : 第2報, 疲労き裂進展特性とフラクタル次元

概要

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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_1 is higher than 100 J/m^2,the fractal dimension of fractured surfaces becomes high due to rubber modification under the same ΔG_1. 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_1) and the fractal dimension, D for unmodified and rubber-modified adhesives. log S-log((da)/(dN)・ΔG_1)=α_4・D+β_4 where α_4 and β_4 are experimental constants. Whether the adhesives contain rubber particles or not, the fractal dimension as well as the da/dN-ΔG_1 relation is little affected by adhesive thickness.
一般社団法人日本機械学会の論文
1997-05-25