エポキシ系接着剤のモードI静的破壊特性に及ぼす架橋ゴム変性の影響

概要

論文の詳細を見る
Epoxy adhesives were modified with CNBR (cross-linked acrylonitrile butadiene rubber) to increase their fracture toughness. Strengths of double cantilever beam specimens fabricated with unmodified and modified epoxy adhesives under Mode I loading were measured. The crack extension resistance given by strain energy release rate G was obtained from the test. Rubber-modified adhesives show higher fracture toughness (the maximum crack extension resistance) than unmodified adhesive. The crack initiates at a relatively low G and grows as G increases. For unmodified adhesive, the maximum crack extension resistance is almost the same as the crack extension resistance in steady-state crack growth. On the other hand, the maximum resistance appears before the crack grows steadily. The variation of crack extension resistance with respect to crack length was influenced by rubber content. Adhesive thickness also affects the crack extension resistance of rubber-modified epoxy adhesives. The fracture surface topology varies according to rubber content.
一般社団法人日本機械学会の論文
1995-05-25