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Structural Engineering and Mechanics Volume 82, Number 2, April25 2022 , pages 259-270 DOI: https://doi.org/10.12989/sem.2022.82.2.259 |
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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 |
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Montaser Fekry
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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. | ||
| Key Words | ||
| additive manufacturing; coupling effects; growing solids; internal dissipation; residual stresses; thermal dissipation | ||
| Address | ||
| Montaser Fekry: Department of Mechanics and Control Processes, Moscow Institute of Physics and Technology (National Research University), Moscow, Russia; Department of Mathematics, Faculty of Science, South Valley University, Qena, Egypt | ||