基于裂纹柔度法的2050-T84铝合金厚板内部残余应力测试研究OA

This article uses the crack flexibility method to apply the premere test on the internal residual stress distribution inside a 90 mm-thick domestically-produced new 2050-T84 aluminum alloy plate.The results show that the stress exhibits a symmetrical"W"-shaped curve,with the peak compressive stress at a distance of 10 mm from the surface(-31 MPa)and the peak tensile stress at a distance of 3 mm from the middle surface(28 MPa).When the interpolation functions are optimized to 5th and 6th order respectively,the total uncertainty of stress calculation for the two samples is at the minimum.This article provides key data support for material performance evaluation and process optimization in the aviation field.