金属電極埋込みエポキシ樹脂の残留熱応力の粘弾性挙動

概要

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Residual stresses which developed through the molding process of epoxide composite with metallic electrodes embedded were studied. Viscoelastic properties of the epoxy were obtained by bending creep tests under constant temperature conditions and the validity of the time-temperature superposition principle was verified through the tests under slowly varying temperature conditions. The residual strain measurements were conducted using circular epoxy plates in which Cu or Al electrodes were embedded. The comparison of the results with the linear viscoelastic solutions of the residual strains obtained by assuming linear cool-down from T_g to room temperature showed good agreement, and it was suggested that the simple elastic FEM solution was applicable for practical applications. The long-term change in residual stress of the epoxy plate with metallic electrodes embedded placed in a cyclically fluctuating temperature atmosphere was estimated based on the theory of linear viscoelasticity and the related thermal fatigue strength was discussed.
社団法人日本材料学会の論文
1984-08-15