Formability mechanism of CFRP sheets using multiscale model based on microscopic characteristics of thermosetting resin

Tetsuo Oya, Akihiro Nishino

研究成果: Article査読

4 被引用数 (Scopus)

抄録

This study was undertaken to attempt to establish the press-forming of carbon fiber-reinforced plastic (CFRP) sheets through a forming simulation. Since press-forming induces large plastic deformation of a material, a reliable simulation requires accurate modeling of the plastic deformation of resin. However, there has been little research on the deformation mechanism of thermosetting resins under large plastic forming, which is targeted in this study, and therefore no appropriate plastic deformation model of a resin has been established. Thus, a new model was constructed for a thermosetting resin on the basis of plastic deformation characteristics considering the microscopic mechanism. In the proposed model, the breakage of molecular chains of a thermosetting resin is considered. A molecular dynamics simulation of epoxy resin determined the effect of this molecular chain breakage. It was confirmed that the proposed model can appropriately represent the mechanical characteristics of an actual thermosetting resin. Furthermore, using this model, the numerical analysis of a CFRP sheet through its representative volume element was carried out, and the result explained the improved formability of CFRP at high temperatures, as observed in related experiments.

本文言語English
ページ(範囲)65-76
ページ数12
ジャーナルMultiscale and Multidisciplinary Modeling, Experiments and Design
4
1
DOI
出版ステータスPublished - 2021 3月

ASJC Scopus subject areas

  • 材料科学一般
  • 材料力学
  • 応用数学

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