Modelling and Closed‐loop Control of Complex Tube Forming Based on an Optimized Application of Martensite Formation in Austenitic Stainless Steels
Modelling and Closed‐loop Control of Complex Tube Forming Based on an Optimized Application of Martensite Formation in Austenitic Stainless Steels
复制标题
基于奥氏体不锈钢马氏体形成优化应用的复杂管材成形建模和闭环控制
DOI：
10.1002/srin.200806194
复制
发表时间：
2008
影响因子：
2.2
通讯作者：
Suttmeier
中科院分区：
文献类型：
--
作者：
Müller-Bollenhagen;Zimmermann;Christ H.-J;Schröder;Große-Wöhrmann;Suttmeier
亚稳态奥氏体钢经历变形诱导的马氏体转变，这可以导致在最佳马氏体体积分数下疲劳强度的显着增加。本研究中使用这种效应来定义极高循环疲劳 (VHCF) 状态下结构零部件的局部强度行为。该研究涉及一种不连续的两阶段成型工艺，该工艺由 U-O 成型和旋转拉弯组成，最终形成拖车联轴器的横管作为示例性动态负载部件。作为在线过程控制的一部分，可以通过成形过程及其参数的塑性力学模拟来调整马氏体的体积分数。马氏体的形成强烈依赖于成形参数（例如温度和应变率）和批次变化。这些干扰变量只能通过闭环控制来考虑。根据非等温材料模型对马氏体演化的模拟精度进行了分析。对于在线控制，研究了关于时间投入和模型误差的各种分层数学模型。
Metastable austenitic steels undergo deformation‐induced martensitic transformation which can lead to a distinct increase of fatigue strength at an optimal volume fraction of martensite. This effect was used in the present study to define the local strength behaviour of a structural component part for the very high cycle fatigue (VHCF) regime. The investigation was on a discontinuous two‐stage forming process that consists of U‐O‐forming and rotary draw bending and results in a cross tube of a trailer coupling as exemplary dynamically loaded component. The volume fraction of martensite can be adjusted by means of plastomechanical simulation of the forming process and its parameters as part of the online process control. The formation of martensite shows a strong dependence on forming parameters (e.g. temperature and strain‐rate) and batch variations. These disturbance variables can only be taken into account by a closed‐loop control. Non‐isothermal material models were analysed according to their simulation accuracy of the martensite evolution. For the online control various hierarchical mathematical models were studied with regard to time effort and model error.
利用超声波疲劳试验评价奥氏体不锈钢的千兆周疲劳性能
DOI：
--
发表时间：
2008
期刊：
Journal of Solid Mechanics and Materials Engineeying Vol.2
影响因子：
--
作者：
Masashi Oonishi;Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Yoshiteru Hainiwa Izuru Nishikawa;Kyouhei TAKAHASHI
通讯作者：
Kyouhei TAKAHASHI