Verification of the simulated residual stress in the cross section of gray cast iron stress lattice shape casting via thermal stress analysis

Yuichi Motoyama*, Daiki Inukai, Toshimitsu Okane, Makoto Yoshida

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

The residual stresses in the thick part of the stress lattice shape casting consist of the residual stress due to the temperature differential between the thick part and the thin part and the residual stress due to the temperature differential in the radial direction of the thick part. In this study, the gray cast iron stress lattice shape castings were cast and both types of the residual stresses were separately measured. Thermal stress analyses based on the casting experiment were conducted. Next, the measurements in this study were compared with both types of the simulated residual stresses. The thermal stress analyses estimated the residual stress due to the temperature difference in the radial direction of the thick part to be significantly higher than the measurement, although the residual stress due to the temperature difference between the thick part and the thin part was successfully predicted within a 10 pct error. Thus, this study suggested the introduction of the mechanical melting temperature, above which the very low yield stress is applied conveniently to describe the losses of the deformation resistance of the casting, to more accurately predict the residual stress due to the temperature difference in the radial direction of the thick part. From the verification of the suggested model, this study demonstrated that the conventional elasto-plastic model must introduce the mechanical melting temperature to predict the residual stress due to the temperature difference in the radial direction of the thick part and thus the overall residual stress in the stress lattice.

本文言語English
ページ(範囲)2315-2325
ページ数11
ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
45
4
DOI
出版ステータスPublished - 2014 4

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金

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