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.

已经开发了基于有限元分析的专家系统，形成优化设计。有限元分析（FEA）模块已被认为是计算机集成制造（CIM）的宝贵补充，以及其他类型的分析和代表性工具，例如CAD/CAM模块。该3-D表FEA计划已作为虚拟制造，所谓的“专家系统”的有前途的工具完成，以优化汽车和钢铁工业中的纸张过程设计。在这项研究中，主要研究了两个主题。限制了夹层建模：（a）基于非线性板和壳板理论的有限元元素。 （b）基于使用巴拉特各向异性产量函数的非正常流量法的速率类型构型方程。 （c）基于Seguchi的摩擦定律（D）通过外部状态Vaxiables评估非线性接触理论的速率类型公式。建立CAE专家系统（A）Forrdng的数据库，材料数据库，例如应力应变曲线，速率灵敏度和各向异性，涂层材料，工具几何，摩擦系数，工作过程。 （b）CAD（IGES标准数据）与FEA的输入数据之间的lnterface。 （c）可将功能因素用于估计懈怠，像局部颈部，皱纹和弹簧一样，并通过模糊控制来优化形成过程。

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”。