OS0318 2軸応力下における工業用純チタン板の塑性変形特性計測と材料モデリング(非立方晶型金属材料の変形現象とそのモデル化,オーガナイズドセッション)

概要

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Tests of pure titanium sheet (JIS #1, 0.5mm thick) subject to biaxial stress were carried out in order to elucidate the anisotropic plastic deformation behavior for linear stress paths using some material testing machines. These tests were performed to observe differential work hardening behavior of plastic work contours in the principal stress space and strength differential between tension and compression. Using the observed data, the applicability of conventional anisotropic yield functions, such as Hill's quadratic function and the Yld2000-2d function, to the accurate prediction of the plastic defonnation behavior of the pure titanium is discussed. However, the work hardening behavior of the pure titanium sheet could not be accurately reproduced using these functions. Additionally, this paper reveals the close relation between the plastic deformation behavior of pure titanium and "twinning deformation" using the metallographic observation for the specimens used in the material tests described above.
一般社団法人日本機械学会の論文
2009-07-24