Modeling the process of thermoelastoplastic deformation for calculating the distribution of residual stresses and strains

• Published in: Metal science and heat treatment 1999-05, Vol.41 (5-6), p.218-222
• Main Authors: KHROMOV, V. N, SENCHENKOV, I. K
• Format: Article
• Language: English
• Subjects: Cylinders; Deformation; Heat treatment; Inductors; Mathematical models; Residual stress; Sleeves; Studies; Temperature gradient; Tractors
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/BF02468423

1. We have developed a thermomechanical model of recovery of worn parts of a void-cylinder type made of iron-carbon alloys by thermoelastoplastic deformation, which makes it possible to predict the stress-train state of the restored part theoretically. 2. The statement of problems of thermoelastoplasticity and their numerical realization by the method of finite elements with virtual coincidence of the calculated and experimental data has shown that the shrinkage of cylinder sleeves of tractor diesels with an internal diameter of 100-130 mm amounts to 0.7-1.2 mm over the diameter. 3. It is expedient to restore internal cylindrical surfaces, such as sleeves of cylinders of tractor engines produced from a special alloy cast iron, by creating a temperature gradient over the axis of the sleeve with heating and subsequent cooling of a local circular part of the cylinder. The heating is conducted to a temperature below that of the phase transformations (760-780°C). The optimum speed of displacing the inductor and the sprayer relative to the sleeve is 1-2 mm/sec. [PUBLICATION ABSTRACT]