主催: 日本学術会議 機械工学委員会・土木工学・建築学委員会 合同IUTAM分科会
共催: 日本機械学会, 日本気象学会, 日本地震工学会, 日本物理学会, 農業農村工学会, 応用物理学会, 化学工学会, 地盤工学会, 土木学会, 日本応用数理学会, 日本風工学会, 日本計算工学会, 日本建築学会, 日本原子力学会, 日本航空宇宙学会, 日本材料学会, 日本数学会, 日本船舶海洋工学会, 日本伝熱学会, 日本流体力学会, 日本レオロジー学会
A numerical method to identify thin films Young's modulus from multiple indentation unloading curves was suggested.
Usual inverse analyses make use of the whole indentation load-displacement curve, and thus require elasto-plastic finite element simulations. Subsequently, all the plastic properties should be identified the same time, leading to heavy computations. However, it was reported that the initial state of the indentation unloading can be considered elastic. For this reason, the proposed method by applying the inverse analysis only to this part of the unloading curve can then rely only on elastic finite element computations.
To ensure the applicability of the procedure, several factors that might affect its accuracy are addressed.
Finally, the method is confronted with experimental indentation data of Polyimide film on Glass/Epoxy substrate.
