Transactions of Nanjing University of Aeronautics & Astronautics
Investigation of Residual Stress Distribution and Its Influence on Machining Deformation in 6061-T651 Aluminum Alloy Plates Using Crack Compliance Method
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Abstract:
To investigate the residual stress distribution and its influence on machining deformation in 6061-T651 aluminum alloy plates， this paper uses the crack compliance method to study the residual stress characteristics of 6061-T651 aluminum alloy plates with a thickness of 75 mm produced by two domestic manufacturers in China. The results indicate that both types of plates exhibit highly consistent and symmetrical M-shaped residual stress profile along the thickness direction， manifested as surface layer compression and core tension. The strain energy density across all specimens ranges from 1.27 kJ/m3 to 1.43 kJ/m3. Machining deformation simulations of an aerospace component incorporating these measured stresses showed minimal final deformation difference between the material sources， with a maximum deviation of only 0.009 mm across specimens. These findings provide critical data for material selection and deformation control in aerospace manufacturing.
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This work was supported in part by the National Natural Science Foundation of China （Nos.61201048， 61107063）， and the National Science and Technology Major Project （No.
Clc Number:
V262.3
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