一种定性判断三维残余应力场测量值的新思路

提出了一种定性判断工件表面残余应力变化趋势的新思路并利用前人实验进行了验证。对于已获得表面残余压应力场的表面强化试样,该理论表明:累计应力松弛量导致剥层工件剩余部分的残余压应力场强度与残余拉应力场强度大幅下降;在表层一定深度范围内残余应力的测量值略大于实际值;表面残余压应力场的深度相比实际残余压应力场的值较大。

A New Idea to Qualitatively Determine 3D Residual Stress Measurements

A new idea was proposed in the present work, based on the principle for the balance of stress field strength, to judge qualitatively the surface residual stress trends, and it was verified by the experimental results in literatures. For the surface-strengthened sample with a surface residual compressive stress field, the proposed theory shows that, the cumulative stress relaxation rate leads to the sharp decrease in the rest of the residual compressive stress field intensity and residual tensile stress field intensity, the surface residual stress measurements within a certain depth range are slightly greater than the actual values, the depth of surface residual compressive stress field is larger than that of the actual residual compressive stress field.