年次大会講演論文集
Online ISSN : 2433-1325
セッションID: 851
会議情報
エポキシ樹脂の混合モード破壊クライテリオン(S07-2 先端材料II,S07 メゾスケールにおける先進材料の力学と強度・機能評価)
荒木 稚子根本 健太郎足立 忠晴山路 昭彦
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会議録・要旨集 フリー

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In this study, we discussed the fracture criterion for mixed mode of the epoxy resin at the room temperature. We conducted the three- and four-point bending tests to determine the fracture toughness under mixed mode loading and compared the experimental results with three theoretical fracture criteria: maximum hoop stress theory, minimum strain density theory, and maximum energy release theory. At lower mode mixity, namely closer to mode I, the fracture envelope and the crack initiation angle could be roughly predicted by the theoretical criteria. However, at higher mode mixity, especially at the vicinity of mode II, the fracture envelope followed neither theoretical nor empirical criteria, which could be due to the effect of thermo-viscoelastic relaxation phenomena, even when the crack initiation angle followed the maximum hoop stress criterion.
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© 2004 一般社団法人日本機械学会
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