Development of expert system for sheet forming optimization design based on finite element analysis.

基于有限元分析的板材成形优化设计专家系统开发

• 批准号: 01550081
• 负责人: NAKAMACHI Eiji
• 金额: $ 1.28万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550081/
• 关键词: Sheet Forming; CAE; Optimization Design; Expert System; Plate-Shell Theory; Finite Element Method; Elastic-Plastic Theory; Anisotropic Plasticity; 板殼理論; 非線形殻理論; 非線形接触法則; 異方性構成関係式; 幾何学形状モデル; ファジィ推論; デ-タベ-ス; 板膜理論; 面内異方性

The expert system for sheet, forming optimization design based on the finite element analysis has been developed. Finite element analysis (FEA) module has been recognized as a valuable addition to Computer Integrated Manufacturing (CIM) along with other kinds of analyses and representational tools such as CAD/CAM modules. This 3-D sheet FEA program has been completed as a promising tool of virtual manufacturing, so-called "Expert System, " for optimaization of sheet forming process design in automotive and steel industries.In this study, mainly two subjects have been studied.Finite clement modeling : (A) Finite element formulation based on the nonlinear plate and shell theory. (B) Rate type constitutive equation based on non-normal flow law employing Barlat anisotropic yield function. (C) Rate type formulation of nonlinear contact theory based on Seguchi's friction law(D) Friction coefficient evaluation by means of external state vaxiables. Establishment of CAE expert system(a) Data base of the sheet forrrdng, material data base, such like stress strain curve, rate sensitivity and anisotropy, coated material, tool geometries, friction coefficient, work process. (b) lnterface between CAD (IGES standard data) and input data for FEA. (c) Formability factors are used to estimate slacknesses, sucli like localized necking, wrinkling and spring back, and optimize the forming process by means of FUZZY control.

开发了基于有限元分析的板料、成形优化设计专家系统。有限元分析 (FEA) 模块与其他类型的分析和代表性工具（例如 CAD/CAM 模块）一起被认为是计算机集成制造 (CIM) 的宝贵补充。这个 3D 板材 FEA 程序已经完成，作为一种有前景的虚拟制造工具，即所谓的“专家系统”，用于优化汽车和钢铁行业的板材成型工艺设计。在这项研究中，主要研究了两个主题。有限元建模：(A) 基于非线性板壳理论的有限元公式。 (B) 采用 Barlat 各向异性屈服函数的基于非正态流动定律的速率型本构方程。 (C)基于Seguchi摩擦定律的非线性接触理论的速率型公式(D)利用外部状态变量评估摩擦系数。 CAE专家系统的建立(a)图纸数据库、材料数据库，如应力应变曲线、速率敏感性和各向异性、涂层材料、刀具几何形状、摩擦系数、工作过程。 (b) CAD（IGES 标准数据）和 FEA 输入数据之间的接口。 (c) 成形性因子用于估计松弛、局部颈缩、起皱和回弹等缺陷，并通过模糊控制优化成形过程。

项目成果

仲町 英治: "空間変形座標基準による異方性塑性板殻体の剛体 接触問題のための非線形有限要素式の導出" 日本機械学会論文集 A編.

Eiji Nakamachi：“基于空间变形坐标的各向异性塑料板壳刚体接触问题非线性有限元方程的推导”，日本机械工程学会会刊，A 卷。

Y.T.Keum,E.Nakamachi,R.H.Wagoner: "Compatible description of tool surfaces and FEM meshes for analyzing sheet forming operations" Numiform 89,eds.E.G.Thampson et.al. A.A.BLKEMA. 489-496 (1989)

Y.T.Keum、E.Nakamachi、R​​.H.Wagoner：“用于分析板材成形操作的工具表面和 FEM 网格的兼容描述”Numiform 89，eds.E.G.Thampson 等人。

Nakamachi, E. and Komada, J.: ""Derivation of the Friction Law for a Coated Sheet by Experiments and Sheet-Forming Finite Element Simulation. "" Trans. JSME.

Nakamachi, E. 和 Komada, J.：“通过实验和片材成形有限元模拟推导涂层片材的摩擦定律。”

Nakamachi, E., Germain, Y. and Wagoner, R. H.: ""A Rigid-Viscoplastic Finite element Analysis of the Punch Stretch-Drawing of Thin Plates, "" Trans. JSME. 56-521 A. 156-161 (1990)

Nakamachi, E.、Germain, Y. 和 Wagoner, R. H.：“薄板冲压拉伸拉伸的刚性粘塑性有限元分析”，Trans。

Nakamura, Y., Nakamachi, E. and Wagoner, R. H.: ""Deep Drawing Analysis of Square Cups with Coated. Rate-Sensitive Steel Sheet, "" Proc. of Computational Plasticity III. (1992)

Nakamura, Y.、Nakamachi, E. 和 Wagoner, R. H.：“带有涂层的方杯的深拉分析”。