ショアかたさ測定値に及ぼす各種の影響に関する研究(第8報) : 試料面の傾斜が及ぼす影響

概要

論文の詳細を見る
In this report, the effect of inclination of the surface of a specimen on the Shore hardness number was investigated. The experiment was carried out with three Shore scleroscopes of D-type on many specimens different in hardness or in material. It need scarcely be mentioned that the general requests for testing were satisfied in this experiment. Especially operating conditions of the tester were carefully maintained constant throughout this experiment without ring effected by the speed of the operating handle and the force with which the specimen was pressed. As a result, the effect of inclination of the specimen on the hardness number was made clear. That is, on the whole, the behaviour of this effect is separated into three sections. Namely, 1st is a horizontal line section where the hardness number has no change, 2nd is a inclined line section where the hardness number drops at a constant rate, and 3rd is a horizontal linear section where the hardness number is scattered in certain range. It has been revealed that the hardness of the specimen, and the structure of the tester, dimensions and finishing grade of its parts have influence upon this effect. And, after all, it has been concluded that the effect of the inclination of specimen is so strong that, in practical testing, it is necessary to attend to keep the surface of the specimen normal to the measuring tube accurately.
一般社団法人日本機械学会の論文
1958-03-25