Numerical modelling of impact damage in fibre-reinforced plastic composites with smoothed particle hydrodynamics

Tomonaga Okabe, Shohei Natsui, Sota Onodera

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

This study develops a computational simulation method to predict nonlinearity, progressive failure behavior and failure strength of CFRP laminates using the SPH method. The fracture mechanism of CFRP laminate subjected to crushing may be categorized in four major failure modes, fiber tensile failure, fiber compressive kinking, matrix cracking and delamination. Hence, these failure modes are modeled in this study. In previous studies, the stiffness or stress values of damaged particles becomes zero instantaneously when the damage occurs. But, this may cause the unrealistic localization of damage. In order to overcome this problem, softening models are implemented in this simulation. The dissipated energy with fiber failure is exceedingly larger than with matrix damage. Therefore, one of the energy based damage model, called smeared crack model (SCM) was used to treat adequately the dissipated damage during fiber kinking. Additionally, in crushing phenomena, countless matrix cracks are generated and it is difficult to simulate individual cracks respectively. Hence, continuum damage mechanics (CDM) is used for modeling multiple cracks that are difficult to discretize in mesoscopic scale. For the modeling of delamination, the damage model considering the separation of interactions between particles is used to reproduce the separation of adjacent plies. In addition, it is known that CFRP shows different elasto-plastic response depending on the loading direction due to the pressure-dependence of epoxy resin. To reproduce this nonlinearity, an anisotropic pressure-dependent elasto-plastic material model is applied for conventional SPH.

本文言語英語
ホスト出版物のタイトル33rd Technical Conference of the American Society for Composites 2018
出版社DEStech Publications Inc.
ページ2059-2075
ページ数17
ISBN(電子版)9781510872073
出版ステータス出版済み - 2018
外部発表はい
イベント33rd Technical Conference of the American Society for Composites 2018 - Seattle, 米国
継続期間: 9 24 20189 27 2018

出版物シリーズ

名前33rd Technical Conference of the American Society for Composites 2018
3

会議

会議33rd Technical Conference of the American Society for Composites 2018
国/地域米国
CitySeattle
Period9/24/189/27/18

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 表面、皮膜および薄膜
  • 金属および合金

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