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Mesoscale damage analysis of needle-punched carbon/carbon composite considering randomness of inherent defects

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journal contribution
posted on 30.09.2019, 08:45 by Meng Han, Chuwei Zhou, Vadim SilberschmidtVadim Silberschmidt
Needle-punched carbon/carbon composites (NP C/Cs) are widely used in aerospace applications thanks to their good high-temperature mechanical properties with relatively low cost. To improve their out-plane stiffness and strength, short-cut fibres are introduced into interlayers between plies using a needle-punching technology. This could result in some defects that decrease their in-plane stiffness and strength. Circle-arc beam elements and extended spring elements are proposed in this research to model mechanical performances of punched fibre bundles, isotropic pyrocarbon matrix and short-cut carbon fibre felts in NP C/Cs, respectively. Aided by this beam-spring finite element model, the impacts from features of mesoscopic defects, e.g. irregularity of distribution of local imperfection in planar fiber bundle caused by punching process, to mechanical properties of NP C/Cs are focused in this study. The ranges of bending modulus and bending strength for a NP C/C are estimated considering the randomness of these defects.

Funding

National Natural Science Foundation of China (11872205, 11272147)

SKL Open Fund (MCMS-0218G01)

Foundation of National Scholarship of China (201706830073)

Priority Academic Program Development of Jiangsu Higher Education Institutions

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Composites Science and Technology

Volume

183

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier Ltd.

Publisher statement

This paper was accepted for publication in the journal Composites Science and Technology and the definitive published version is available at https://doi.org/10.1016/j.compscitech.2019.107821.

Acceptance date

10/09/2019

Publication date

2019-09-11

Copyright date

2019

ISSN

0266-3538

Language

en

Depositor

Prof Vadim Silberschmidt

Article number

107821