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1.

論文(リポジトリ)

論文(リポジトリ)
Ishibashi, Tatsuya ; Shimoda, Shigeru
出版情報: Bulletin of JSME.  29  pp.4013-4019,  1986-12.  THE JAPAN SOCIETY OF MECHANICAL ENGINEERS
本文リンク: http://hdl.handle.net/10191/1799
概要: Hardness is influenced by mechanical properties of a spherical indenter in the elastic-plastic transient indenting process. To clarify that point, we indented steel and tungsten carbide spherical indenters into several standard blocks for hardness. In order to experimentally establish the relations of the elastic-plastic transient indenting process. we related the hardness Pm (mean contact pressure) with the true profile coefficient of a permanent indentation (d/Dp), not with an apparent profile coefficient (d/D) used traditionally, and formulated as follows; P_m = P_<up> (dlD_p)^<I_p> We can calculate the hardness affected by the different mechanical properties of the spherical indenter using this formula for arbitrary conditions. Further, we compared the Brinell hardness obtained by Yoshizawa with our calculated values, and found good coincidence between them. 続きを見る
2.

論文(リポジトリ)

論文(リポジトリ)
石橋, 達弥 ; 下田, 茂
出版情報: 日本機械学会論文集. A編 — 日本機械学会論文集. A編.  52  pp.1958-1965,  1986-08.  日本機械学会
本文リンク: http://hdl.handle.net/10191/1769
概要: Hardness is influenced by the different mechanical properties of the spherical indenter in the elastic-plastic transient indenting process. To clarify that point, we indented steel and tungsten-carbide spherical indenters in the several standard blocks for hardness. In order to establish the relations of the elastic-plastic transient indenting process experimentally we related the hardness P_m(mean contact pressure) with a true profile coefficient of the permanent indentation : (d/D_p), not with an apparent profile coefficient : (d/D) used traditionally, and formulated as follows ; P_m=P_<up>(d/D_p)^<xp>. We can calculate the hardness affected by the different mechanical properties of the spherical indenter using this formula for arbitrary conditions. Further, we compared the Brinell hardness obtained by Yoshizawa with our calculated values, and we obtained a good coincidence between them. 続きを見る