Novel Fatigue Characterization and its Evaluation on a Forged Ti-6Al-4V Component
Both geometrical optimization and time efficient design of high performance structural components require improved computational lifetime calculation methods. It is important to optimise the transferability from specimen results to real components. For the fatigue behaviour prediction of real components,it is necessary to evaluate these results from different life time calculation methods. The methods for the lifetime calculation of components are based and parameterised on the results obtained from the pure specimen tests. In this work a closed loop for the lifetime evaluation of a component is presented. The cyclic material behaviour of Ti-6Al-4V alloy,one of the most widely used titanium materials for space technology due to its excellent properties was determined. The influences such as microstructure,stress-ratio, etc. , were investigated in separate test series. With material data from cyclic tests,on one hand a Finite-Elementsimulation can be carried out and on the other hand the lifetime calculation can be obtained. To quantify the transferability of the result from standard specimen tests to real components, the simplified component W-Link was developed. This was designed based on a real aircraft component and represents the load and boundary condition as in a real system. The lifetime calculation method can be achieved based on numerical results from Finite-Element- analysis. Fatigue test was performed on the component as well. Thereby, a comparison between experimental and simulation life time was realised. This revealed that the results can be affected by further influencing factors. Microscopic investigation lead to an empirical factor which allows consideration of one of the most dominant factors i. e. , fretting. For evaluating different methods, already available lifetime calculation results with the software program FEMFAT and,lifetime evaluation based on material properties defined by the Manson-CoffinBasquin law,focussing on strain-controlled parameters, were compared with the results from the present method.
Fatigue behaviour lifetime evaluation Ti-6Al-4V
Wen Tan Michael Stoschka Hermann Maderbacher Martin Riedler Wilfried Eichlseder
Chair of Mechanical Engineering,Montanuniversit(a)t Leoben,Austria B(o)hler Schmiedetechnik GmbH&Co KG,Austria
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1979-1983
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）