Effects of residual stresses on the bending stiffness of shafts strengthened by enveloping de-formation

The aim was to study the effects of technological residual stresses on bending stiffness cylindrical parts shafts and axes. Experiments were conducted for elongated specimens made steel grade 35 with a diameter 30 mm using boring turning methods. Specimens annealed in protective medium remove initial stresses. carried out an Amsler laboratory hydraulic testing machine VK8 hard-alloy matrices. experiments showed that, extremely low degree relative crimping 0.1 0.5%, size layer tangential compression gradually decreases. such workpieces remains almost unchanged. An increase (from 0.5 1.2%) leads decrease resi dual part surface. thickness starts increase. This decreased buckling increased stiffness. It found that has no effect variation distribution depth axial Optimal can be reached by increasing their depth. A linear relationship 1.0%. highest resistance recorded strengthened about By processing enveloping deformation 0.1% loading them transverse force 0.6 kN, distortion strength 5 times. is greatly affected bedding various parts. Thus, correct use strengthening form high-quality surface pre-defined