Aeronautical structures are typically made of complex thin-walled parts of lightweight alloys. These parts are obtained from rolled or forged preforms by machining. Factors such as the residual stresses, the machining fixture and the material removal strategy play an essential roll on the final distortion induced on these low-rigidity parts. A finite element analysis to estimate the effects of the residual stresses and the material removal strategy on part deflections is provided in the present paper. A real aeronautical part of 7050-T7451 aluminium alloy is studied. Different relative positions of the workpiece within the preform thickness are explored in order to minimize the final deflections of the part. Numerical simulations are successfully validated with experimental results.
Optimization of material removal strategy to reduce machining deflections induced by residual stresses in lightweight aeronautical parts
2009
7 Seiten, 10 Bilder, 4 Tabellen, 7 Quellen
Conference paper
English
New machining processes for aeronautical parts
Emerald Group Publishing | 2004
STRESSES AND DEFLECTIONS IN PLANETARY RING GEARS
SAE Technical Papers | 1954
|Analysis of Stresses and Deflections in RTDs
Online Contents | 1998
Loads, stresses and deflections in bicycle frames
Tema Archive | 1986
|Stresses and deflections in truck side rail attachments
Engineering Index Backfile | 1969
|