Titanium components for the aerospace industry are subjected to heat treatment after forging to adjust the microstructure. During subsequent cooling in still or moving air, the component warps, so that a considerable allowance (oversize) has to be taken into account. This allowance leads to significantly higher material usage and correspondingly increased machining effort. In order to reduce the required allowance, the distortion is to be determined and optimized by means of simulation in process planning. This involves combining various physical problems: heat transport in the component and the supports and via their contact points, thermal radiation between the components, heat transport through the air, and warpage of the component due to the different cooling rates in the component itself. In the SimProTi research project, the calculations of the cooling process after heat treatment and the resulting warpage are coupled sequentially. A high degree of automation allows easy processing of different variants.
In this presentation, the results of the research project are presented. Especially the use of the user subroutine UTEMP in Abaqus/Standard and the customization in Abaqus/CAE will be discussed.
Presenter: Ralf PASSMANN, DHCAE Tools GmbH
