Structural Engineering and Mechanics

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Reduction of the residual stresses during the additive manufacturing of a thermo-viscoelastic growing cylinder under non-uniform volumetric heating by electric induction

  • Fekry, Montaser (Department of Mechanics and Control Processes, Moscow Institute of Physics and Technology (National Research University))
  • Received : 2021.11.08
  • Accepted : 2022.02.03
  • Published : 2022.04.25
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Abstract

The paper investigates the residual stresses arising in a thermoviscoelastic cylinder as a result of layer-by-layer deposition of material on its lateral surface. Internal stresses are caused by incompatible deformations that accumulate in the assembly as a result of joining parts with different temperatures. For the analysis of internal stresses, an analytical solution to the axisymmetric quasi-static problem of thermoelasticity for a growing cylinder is constructed. It is shown that the distribution of residual stresses depends on the scenario of the surfacing process. In this case, the supply of additional heat to the growing body can significantly reduce the unevenness of temperature fields and reduce the intensity of residual stresses. The most effective is uneven heating, which can be realized, by the action of an alternating current with a tunable excitation frequency. The temperature and residual stresses fields on the growing surface is analyzed numerically for Titanium and Copper materials.

Keywords

Acknowledgement

The paper's author, Montaser Fekry is funded by a PhD scholarship from the Ministry of Higher Education of the Arab Republic of Egypt and the Russian Government Scholarship with application No: EGY-6154/17.

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