303 金属薄膜の疲労寿命に及ぼすマイクロバックリングの影響

概要

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To examine experimentally the effect of restraining condition of thin foil on fatigue life, strain controlled tension compression fatigue test and microscopic observation were made for thin metal foil embedded in an epoxy resin. The foils were 10μm thick, 1 mm, 2 mm, 4 mm, 8 mm, 100 mm long and on which silicon oil was applied to change the restraining conditions. As a result, (1) Micro buckling occurred in a foil under repeated load and crack initiated at the area were observed. (2) When silicon oil was applied, the energy spent during foil deformation decreased, and the fatigue life fell off. (3) The restraining condition changed the fatigue life of a foil from 3 to 10 times. (4) As a flexible printed circuit consists of resin and foil, it is conceivable that the temperature change exerts a large influence on the fatigue life of it.
一般社団法人日本機械学会の論文
2000-09-08