Effective mechanical properties of injection-molded short fiber reinforced PEEK composites using periodic homogenization

Jian Zhao*, Chengjie Guo, Xiubin Zuo, Allen Jonathan Román, Yinghao Nie, Dong Xiao Su, Lih Sheng Turng*, Tim A. Osswald, Gengdong Cheng*, Weidong Chen

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

32 Scopus citations

Abstract

Injection-molded short fiber composites are strongly anisotropic through the thickness of parts, and an accurate prediction of the effective mechanical properties remains an incredibly challenging task. This paper deals with a methodology for the calculation of elasto-plastic behaviors of short fiber reinforced composites. The micro-computed tomography (μCT) is utilized at first to obtain the fiber orientation distribution in a material sample, and then the five-layer structure is displayed and analyzed. Secondly, the numerical modeling of representative volume elements (RVEs) with specified fiber orientations is proposed based on the laminate structure. Furthermore, finite element homogenization with the periodic boundary condition is employed to analyze the relations of the elasto-plastic behaviors of RVE with five layers: the skin layers, shell zones, and core region. Based on the experimental results, the proposed multi-scale modeling method was found to accurately predict the effective elasto-plastic behaviors of the injection-molded short fiber composites. Graphical abstract: The numerical implementation of finite element homogenization with the periodic boundary condition was successfully conducted to study the effective mechanical properties of short fiber reinforced composites. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)2964-2976
Number of pages13
JournalAdvanced Composites and Hybrid Materials
Volume5
Issue number4
DOIs
StatePublished - 12 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

Keywords

  • A. Discontinuous reinforcement
  • A. Fibers
  • B. Mechanical properties
  • C. Computational modeling
  • C. Finite element analysis (FEA)
  • E. Injection molding

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