Thermo-mechanical coupling topology optimization of leading edge structures considering GH4099 additive manufacturing constraints

  • Liu, HaiTao (Beijing Institute of Mechanical and Electrica)
  • Zhu, ShengQiao (Dalian University of Technology)
  • Li, JingDa (Dalian University of Technology)
  • Lv, Jun (Dalian University of Technology)

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In this paper, a design method for hypersonic lightweight leading edge structures considering the constraints of high-temperature alloy GH4099 additive manufacturing technology is proposed. In order to improve the thermal and mechanical properties, the thermo-mechanical coupling topology optimization of hypersonic structures is studied in this paper. In the optimization design of the leading edge structure, the geometric average temperature of the structures is taken as the objective function, and the self-supporting constraint in additive manufacturing is also considered. Thus, on the one hand, the high temperature of the leading edge stagnation point is reduced, and the overall temperature gradient of the structure is also reduced. On the other hand, by enhancing the load path and self-supporting constraints in the structural design, GH4099 can be used to easily manufacture the leading edge and improve the bearing capacity of the structure. Through numerical calculations and experimental analysis, the design method proposed in this paper can effectively reduce the thermal stress of the leading edge structures and provide a reference for the design of hypersonic structures.