Construction of Materials Database on High Temperature Inelastic Behavior of Metallic Materials and the Application to Numerical Analyses

金属材料高温非弹性行为材料数据库的构建及数值分析应用

基本信息

批准号：
11555033
负责人：
INOUE Tatsuo
金额：
$ 8.38万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

Simulation to determine coupled fields of temperature, metallic structure and stress/strain in the course of engineering processes incorporating phase transformation, such as quenching, welding, casting and so on, needs so many material data ; thermal conductivity and specific heat for heat conduction, CCT or TTT diagram, temperature-dilatation chart for phase change, and Stress-strain constitutive relation, elastic constants, all of which depend on temperature. This project motivates the construction of a materials database cooperating with the activity of Subcommittee of Materials Database, Committee of Engineering Plasticity, the Society of Materials Science, Japan, and the evaluation of the validity and applicability to numerical simulation. More than 50 kinds of steel used for heat treatment are focused here to accumulate the following material data, which are taken from documents and experiments ; stress-strain curve under 5% strain, thermal conductivity, specific heat, elastic modulus, CCT and TTT diagram, temperature-elongation diagram. The database tool built on MS-Excel is designed in a hierarchical structure so that users can easily approach, and the material data in the developed database are converted to a database, MATEQ.This database contains more than 1000 kinds of data series for s-s curves and 50-100 for other properties, which triggers future development of more sophisticated database. The validity of the database and applicability to numerical simulation is also examined by simulating several kinds of processes with phase transformation.

淬火、焊接、铸造等涉及相变的工程过程中，通过模拟确定温度、金属组织和应力/应变的耦合场，需要大量的材料数据；热传导的热导率和比热、CCT 或 TTT 图、相变的温度膨胀图、应力应变本构关系、弹性常数，所有这些都取决于温度。该项目推动与日本材料学会工程塑性委员会材料数据库小组委员会的活动合作建设材料数据库，并对数值模拟的有效性和适用性进行评估。重点关注50多种热处理用钢种，积累以下材料数据，这些数据均取自文献和实验； 5%应变下的应力-应变曲线、导热系数、比热、弹性模量、CCT和TTT图、温度-伸长图。基于MS-Excel构建的数据库工具采用分层结构设计，以便用户轻松使用，并将开发的数据库中的材料数据转换为数据库MATEQ。该数据库包含1000多种s-s曲线数据系列其他属性为 50-100，这会触发未来开发更复杂的数据库。通过模拟几种相变过程，也检验了数据库的有效性和数值模拟的适用性。