Study on Machining Distortion of Residual Stress Release
When machining multi-frame complex components, more than 90% of the materials would be removed, resulting in severe distortion of the parts due to the weakened rigidity and the release of residual stress. This might also lead to stress concentration and damage of the parts. The effect of material removal from residually stressed billet is simulated using FEA software ANSYS, and the causations of distortion is analyzed. To verify the finite element simulation, a high speed milling test on aluminum alloy 7050T7351 is carried out. The results show that the simulation result is consistent with the experimental one. It included that the original residual stress in the blocks of aero-aluminum component is one of key factors to cause machining distortion.
Dunwen Zuo, Chuanzhen Huang, Ming Chen, Jun Li and Guo Hun
J. Chen "Study on Machining Distortion of Residual Stress Release", Advanced Materials Research, Vol. 426, pp. 143-146, 2012