切欠きをもつ硬質プラスチックの曲げによるぜい性破壊の条件

概要

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The fracture behavior in bending of notched bars of polycarbonate, polyvinylchloride and polymethyl methacrylate has been investigated. The uniform bending tests of single edge notched plates that are thick enough to yield in plane strain have been carried out for a wide range of notch radii. The experimental results were discussed in terms of the critical maximum stress and the notch root radius. The main results obtained are as follows : (1) The predominant factors for determining the ductile-brittle transition of fracture mode in bending are the notch root radius and thickness of specimen. (2) The critical maximum stress for brittle fracture is governed by notch root radius alone in the case of a constant thickness of specimen. (3) The fracture criterion of notched bar mentioned above, is commonly applied to both tension and bending, and the criterion holds in three kinds of rigid plastics.
一般社団法人日本機械学会の論文
1985-02-25