| Popis: |
The technological operation of bending is widely used in the manufacture of various parts, both rod-like, for example, springs of various types, and shell-type, such as shells and bottoms of petrochemical apparatus, hulls of ships, automobiles. The magnitude of the maximum plastic deformations arising in this case varies within wide limits and can reach rather large values, significantly exceeding the elastic deformations. Regardless of the level of maximum deformations in the product, residual stresses arise, affecting its performance. The paper proposes an approximate method for assessing residual stresses, after complete unloading, depending on the maximum tensile deformations during bending, which is based on the assumption of a linear distribution of deformations over the cross section. Various variants of approximation by a real deformation diagram are considered. |
