Bremen 2017 – scientific programme
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P: Fachverband Plasmaphysik
P 2: Helmholtz Graduate School I
P 2.1: Talk
Monday, March 13, 2017, 08:30–08:55, HS 1010
Topology optimisation of two material structures for plasma-facing component applications — •Alexander von Müller1,2, Rudolf Neu1,2, Udo von Toussaint1, and Jeong-Ha You1 — 1Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany — 2Technische Universität München, 85748 Garching, Germany
An important plasma-facing component (PFC) in future magnetic confinement nuclear fusion devices is the divertor which allows power exhaust and removal of impurities from the main plasma during operation. The most highly loaded parts of a divertor have to withstand intense particle bombardment which in turn leads to severe heat fluxes.
According to the current understanding, tungsten (W) is used as a plasma facing material while copper (Cu) is used as heat sink material in such a component. However, the combination of these materials bears difficulties due to their inherently different thermomechanical properties leading to thermal stresses during heat flux loading.
Up-to-date additive manufacturing technologies offer possibilities to materialise objects with almost any shape. Against this background, the question arises whether a topologically optimised W-Cu structure can be beneficial in order to achieve an improved PFC design.
The contribution addresses this issue by assessing the suitability of topology optimisation techniques regarding the abovementioned two material problem. An approach is presented how such an optimisation can be implemented. Eventually, the practicality of this approach is demonstrated based on a representative test case.