Evaluation of the strain rate dependent behavior of a CFRP using two different Hopkinson bars

H. Paul, M. Isakov, N. Ledford, S. Nagasawa, M. May

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In many studies the strain rate sensitivity of a CFRP material is investigated thoroughly in only one layup and loading direction, which brings about challenges in the comparison of the results due to the large layup- and loading mode-dependence of the material behavior. To address this challenge, in this study we characterize one CFRP material comprehensively in different rate dependent configurations. We demonstrate the feasibility of the Hopkinson Bar technique in the high strain rate testing of CFRP materials. We also highlight the importance of carefully designing and analyzing the experiments for each layup separately. That is, we show how notably different material behavior and therefore notably different test requirements are obtained for the nominally same composite material by simply changing the layup. Two different Hopkinson Bar Set-ups were used; a Direct Impact Hopkinson Pressure Bar (DIHPB) for the characterization of the compressive response of the UD material perpendicular to the fiber direction and a Split Hopkinson Tension Bar (SHTB) for the characterization of the tensile response of three different layups: UD material perpendicular to the fiber direction, a ±45-laminate, and a quasi-isotropic layup. For each studied layup, the specimen geometry, mounting concept and testing approach were individually adapted. As a result, it was possible to comprehensively evaluate the high rate response of the CFRP composite at a strain rate of 200 s-1 with a high quality of results.

本文言語English
ホスト出版物のタイトルECCM 2018 - 18th European Conference on Composite Materials
出版社Applied Mechanics Laboratory
ISBN(電子版)9781510896932
出版ステータスPublished - 2020
イベント18th European Conference on Composite Materials, ECCM 2018 - Athens, Greece
継続期間: 2018 6 242018 6 28

出版物シリーズ

名前ECCM 2018 - 18th European Conference on Composite Materials

Conference

Conference18th European Conference on Composite Materials, ECCM 2018
CountryGreece
CityAthens
Period18/6/2418/6/28

ASJC Scopus subject areas

  • Ceramics and Composites

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