Evaluation of residual stresses in additively produced thermoelastic cylinder. Part II. Residual stresses

Abstract

The time-dependent evolution of self-stressed state in additively produced thermolastic cylinder during the additive process and after its completion is studied. The time-dependent temperature distribution is taken from the solution of heat evolutionary problem, derived in the first part of this work (Part I. Thermal fields). The representations for strains and stresses are obtained analytically in the framework of linear semi-coupled thermoelasticity (theory of thermal stresses). Based on the obtained solutions the numerical analysis for different scenarios of additive processes is carried out. It focuses on the influence of auxiliary high frequency inductive heating on the distributions for internal stresses and shape distortion during the processes and their residual counterparts. It is shown that the use of induction heating makes it possible to halve the maximum stress intensity. The calculations are carried out in the dimensionless form. The dimensionless parameters that are used correspond to Titanium.

Keywords:

• Additively manufactured solids
• thermoelasticity
• surface growth
• thermal stresses
• shape distortion
• inhomogeneous auxiliary heating
• lowering residual stress intensity
• analytic solution

Additional information

Funding

The study was supported by a grant RSF No. 22-21-00457. Russian Science Foundation. https://rscf.ru/en/project/22-21-00457/