押込かたさにおける相似則について

概要

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In this report, we offered a new definition of hardness and named instantaneous energy hardness. Then, it was noted that the well-known Meyer's hardness is the same in number as the instantaneous energy hardness. The general relation of the law of similarity, which must exist in the measurement of energy hardness, was discussed, being proved by experiments. It was shown that Dr. Honda's constants "α"and"k"are not only due to the property of material, but they are inversely and directly proportional to the radius of ball respectively. When a cone-penetrator is used, a parabolic relation exists between the applied load P and the indentated depth h, which may be written P=kh^2. As far as the vertex angle θ of the cone penetrator remains constant, the absorbed energy K per unit volume of indentation also remains constant. It is written [numerical formula] , where α and b are constants which depend only on the property of material.
一般社団法人日本機械学会の論文
1952-01-20