2018 押込試験を利用した材料特性評価における唯一性の欠如(S16-2 物理的・力学的現象,S16 インデンテーションの物理と応用)

概要

論文の詳細を見る
One of the most well-established indentation techniques utilizes dual sharp indenters to deduce elastoplastic properties for materials that obey power-law constitutive relationship. However, the uniqueness of such analysis is not yet systematically studied. Here we show the existence of "mystical materials", which have distinct elastoplastic properties yet they yield almost identical indentation behaviors, even when the indenter angle is varied in a large range. These mystical materials are therefore indistinguishable by most existing indentation analyses unless extreme indenter angles are used. Explicit procedures of deriving these mystical materials are established. In many cases, for a given indenter angle range, a material would have infinite numbers of mystical siblings, and the existence maps of the mystical materials are also obtained.
一般社団法人日本機械学会の論文
2007-09-07