引っ張りと曲げを受ける片側き裂付き平板に対する線形弾性コンプライアンスの簡易評価式

概要

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Closed-form expressions of the stress intensity factor are so useful in fracture mechanics analysis that a number of expressions have been obtained for various kinds of cracked specimens. However, most of actual structures are statically indeterminate, and stress intensity factors for such statically indeterminate cracked structures cannot be estimated only in terms of the above expressions. Such crack problems in statically indeterminate structures were systematically discussed by Okamura et al. , and stress intensity factors for statically indeterminate cracked structures were shown to be estimated in terms of the crack compliance, i. e., the variation of compliance due to the presence of cracks. In this paper, an estimation scheme of closed-form expressions for crack compliance is presented. First, asymptotic properties of the crack compliance are obtained for single edge notched (SEN) specimens under both tension and bending. Then, closed-form expressions are estimated based on the asymptotic properties. The obtained expressions are shown to be quite accurate and useful for not only engineering discussion but also theoretical study.
一般社団法人日本機械学会の論文
1993-11-25