構造設計による金属積層造形の熱変形低減

Akihiro Takezawa*

*この研究の対応する著者

研究成果: Review article査読

抄録

The reduction of thermal strain generated in the manufacturing process of metal additive manufacturing is an important issue. This review considers the problem of forming an object with an internal lattice structure to reduce the thermal strain and presents the author's research on the optimization of the lattice density distribution and its experimental verification. The base lattice geometry is assumed to be a cube with spherical voids, and the optimization problem is constructed based on the recurrent equation of the inherent strain model, sensitivity analysis, and gradient method. The design variable is the representative size of the internal lattice geometry. The effective stiffness tensor of the lattice is derived using the homogenization method, and the approximation function between the design variables and the effective properties is derived. The values of the inherent strain are calibrated using several specimens with uniform lattice density. Optimization is also performed for a quasi-two-dimensional example. Experimental verification is performed by laser powder bed fusion fabrication and warp deformation measurements.

寄稿の翻訳タイトルLarge reduction of thermal deformation in metal additive manufacturing by structural design
本文言語Japanese
ページ(範囲)234-239
ページ数6
ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
72
5
DOI
出版ステータスPublished - 2022

Keywords

  • in-herent strain method
  • powder bed fusion
  • thermal distortion
  • variable lattice density optimization

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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