Generating a Closed Simulation Chain for Hot Forged Aerospace Components to Optimize Fatigue Behaviour
The general comprehension concerning tailor-made lightweight airplane components has changed and new standards were introduced in recent years. Today,it is not only essential to find the best suited material with the best possible mechanical properties,but also the local material behaviour must show optimal performance. Furthermore the design has to be observe the flow of force and keep the stress concentrations as low as possible whilst minimizing the weight at the same time. In addition.it is necessary to select the surface treatment such that advantageous topographical properties and residual stresses arise. So the design of components is no longer just the result of the subjective sensation of the designer , but should become the end product of a well-defined optimization process. The present work depicts the possibility of optimizing heavy duty aerospace components made of hot-forged titanium alloy with respect to their fatigue strength, regarding the entire design and manufacturing process. To create these optimized components,an integrated optimization chain is proposed encompassing component design,manufacturing,and strength evaluation. This chain comprises topology or shape optimization delivering the optimized geometry at minimized weight for the available design space at defined loads. The core of the simulation chain is the forging and heat treatment optimization with respect to the fatigue strength distribution in the component. To this purpose, the forging and heat treatment simulation is linked to an optimization tool which adjusts the local microstructure such that the fatigue endurance is maximized. In the last step the component,optimized in terms of geometry and microstructure, is subjected to a lifetime estimation. Herein order to calculate damage or critical crack size, influence factors like stress amplitudes and mean stresses (determined by finite element analysis) as well as the surface finishing are considered.
Optimization fatigue simulation chain forging Ti6. 4
H. Maderbacher M. Riedler B. Oberwinkler H. -P. G(a)nser W. Tan W. Eichlseder
Chair of Mechanical Engineering,Montanuniversitdt Leoben,Franz-Josef-Strajβe 18,8700 Leoben,Austria Bohler Schmiedetechnik GmbH&Co KG,Mariazeller strafe 25,8605 Kapfenberg,Austria Materials Center Leoben Forschung GmbH,Roseggerstrafe 12,8700 Leoben,Austria
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1965-1968
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）