Stochastic prediction of apparent compressive stiffness of selective laser sintered lattice structure with geometrical imperfection and uncertainty in material property

Naoki Takano, Hideo Takizawa, Pin Wen, Kendo Odaka, Satoru Matsunaga, Shinichi Abe

研究成果: Article査読

29 被引用数 (Scopus)

抄録

Aiming at the future applications of a lattice structure manufactured by selective laser sintering for bone scaffold in the biomedical field, by putting highlight on the possible imperfections influenced by different manufacturing strategies, a numerical prediction method was studied and compared with compressive test results. To consider the geometrical imperfections as well as the uncertainty in sintered material property, the first-order perturbation based stochastic homogenization (FPSH) method was employed. To be able to compare products made by three different printing service companies, maraging steel was used in this study, which was commonly available. Several geometrical imperfections were categorized into kink, notch and hole, and representative dimensions were parameterized and measured statistically using micro-CT images. They were also correlated to the building direction and support types. The numerical prediction revealed the reduction of stiffness in a stochastic way qualitatively. The constructed database of the geometrical imperfections and the FPSH method will be useful in the next occasion of manufacturing unexperienced product.

本文言語English
ページ(範囲)347-356
ページ数10
ジャーナルInternational Journal of Mechanical Sciences
134
DOI
出版ステータスPublished - 2017 12

ASJC Scopus subject areas

  • 土木構造工学
  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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