2024-03-28T14:08:41Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02000912
2023-08-03T05:36:21Z
1642838163960:1642838338003
1642838403551:1642838406845
有限要素多結晶体モデルを用いた応力増分方向依存塑性構成式パラメータの決定
Determination of Constitutive Equation Parameter Using Finite Element Polycrystalline Model
末吉, 敏恭
呉屋, 守章
伊藤, 耿一
宮城, 清宏
Sueyoshi, Toshiyasu
Goya, Moriaki
Ito, Koichi
Miyagi, Kiyohiro
Plasticity
Anisotropy
Constitutive Equation
Directional Dependence Rule
Natural Direction
Finite Element Polycrystalline Model
Associated Flow Rule
A plastic constitutive theory incorporating the directional dependence of the plastic strain increment dε^p on the stress increment dσ' was proposed by Goya and Ito. The expression was given in terms of two transition parameters μ(α) and β(α) which denote the magnitude and the direction angle of the plastic increment, where α denotes the direction angle of the stress increment measured from a particular direction n_N, named "natural direction", in which the direction of the stress increment coincide with that of the plastic strain increment. In this report, a computer code for a finite element polycrystalline model is used for the numerical investigation of the variation of the two constitutive parameters μ(α) and β(α) of anisotropic plastic materials. The results show that the approximate functions for the two transition parameters are numerically determined and the direction dependence rule can be naturally extended for anisotropic plastic materials. It is also suggested that several quadratic functions used for classical plastic potential may be introduced for the natural direction potential whose normal is identical to the natural direction.
論文
http://purl.org/coar/resource_type/c_6501
日本機械学会
2001-11-25
VoR
http://hdl.handle.net/20.500.12000/255
03875008
AN0018742X
日本機械学会論文集. A編
Transactions of the Japan Society of Mechanical Engineers. A
663
67
49
44
jpn
open access
Copyright (c) 2001 日本機械学会