中心穴をもつ軟鋼帯板の降伏における寸法効果

概要

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This paper describes the experimental results and the theoretical analysis concerning the size effect on yielding in a perforated mild steel strip under tension. The main conclusions obtained are as follows : (1) There are two modes in yielding ; one is the whole section yielding and the other is the local yielding. (2) The yield point of the strip is influenced not only by the ratio of the diameter of the hole to the width of the strip, but also by the width itself. We made the theoretical analysis by taking the effect of the surface layer into account and it was shown that the analytical results coincide well with the experimental data. Moreover, we pointed out that the thickness of the surface layer is 0.08 mm which corresponds to about 6 times the grain size of the material.
一般社団法人日本機械学会の論文
1986-05-25