エポキシ樹脂の曲げ破壊挙動に及ぼす残留応力の影響

概要

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The residual stress generated during the molding process of thermosetting resins gives a serious influence upon the mechanical properties. This residual stress is generally classified into two groups one produced by shrinkage in the curing reaction of monomers, and the other produced by non-uniformity of the temperature distribution in the cooling process. This paper is concerned with the influence of residual stress by rapid cooling on flexural fracture behavior of epoxy resin. It is explained by using thermoviscoelastic model and confirmed experimentally that the large frozen strain as well as residual stress are generated by the thermoviscoelastic behavior of epoxy resin when it is cooled rapidly. The residual stress have a large effect on the flexural fracture behavior of epoxy resin, which is independent of the frozen strain.
社団法人日本材料学会の論文
1988-07-15