Experimental investigation of arbitrary non-linear load paths using a feedback controller in combination with a conventional sheet metal testing machine and a special tool for cruciform specimens

使用反馈控制器结合传统钣金试验机和十字形样品专用工具对任意非线性载荷路径进行实验研究

基本信息

批准号：
389864979
负责人：
Professor Dr.-Ing. Wolfram Volk
金额：
--
依托单位：
Lehrstuhl für Umformtechnik und Gießereiwesen
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2018
资助国家：
德国
起止时间：
2017-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/389864979?language=en
关键词：
Experimental investigation arbitrary non linear

项目摘要

The prediction of formability is one of the most important tasks in sheet metal forming. The combination of growing demands on design and rising cost pressures implies the further exploit of forming limits. The prediction of non-linear load paths is a critical aspect. Nowadays, several tools and presses are necessary for the experimental investigation of arbitrary non-linear load paths. The experimental validation of the proposed methods, which help solve the problem, is still challenging because of the high amount of costs and time needed. Therefore, the main goal of the research project is the partly automated experimental investigation of given arbitrary non-linear load paths using a sheet metal testing machine. The interrelationships between the effective drawbead height and the blankholder force and their impact on the strain ratio are carried out using a big experimental and numerical data base. Another objective is the design of a feedback controller and its integration into a present experimental setup for material characterization. In combination with a special tool for cruciform specimens the experimental setup is able to cover non-linear load paths experimentally. Thus an economic validation of corresponding simulated non-linear load paths can be realized using one specimen and one tool. This gives the possibility to make a contribution to an improved prediction of the formability of complex parts.

预测可调节性是钣金形成中最重要的任务之一。对设计和成本压力的增长需求的结合意味着进一步的形成限制。非线性载荷路径的预测是关键方面。如今，对于任意非线性载荷路径的实验研究，需要几种工具和压机。由于需要大量的成本和时间，对有助于解决问题的拟议方法的实验验证仍然具有挑战性。因此，研究项目的主要目标是使用钣金测试机对给定的非线性载荷路径进行部分自动化的实验研究。有效的绘制杆高度与空白持有人力及其对应变比的影响之间的相互关系是使用大型实验和数值数据库进行的。另一个目标是设计反馈控制器及其集成到当前的实验设置中，以进行材料表征。结合一个特殊的十字形标本工具，实验设置能够实验覆盖非线性载荷路径。因此，可以使用一个标本和一个工具来实现相应模拟的非线性负载路径的经济验证。这有可能为改进的复杂部分的形成性做出贡献。