Hypervelocity impact behavior and residual flexural strength of C/C composites

Li Zhen Xue, Ke Zhi Li, Yan Jia, Shou Yang Zhang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

This paper describes the hypervelocity impact behavior and the residual strength of carbon fiber reinforced carbon (C/C) composites under different impact velocity. Impact tests of 2.5D C/C composite samples have been performed using one stainless steel ball driven by solid explosive to detect correlations between the impact direction and damage distribution and the residual flexural strength of the composites. Results showed that the impact resistance of the C/C composites was affected by the impact velocity. Damage modes evolved from matrix cracking and fiber breakages to spallation and delamination along the impact direction. Furthermore, delamination occurs delamination occurred in mat plies and 90° plies, resulting from poor load-bearing capability of short mat layers and weak adhesion between fiber bundles. In addition, the residual strength of the damaged C/C composites decreased by 30.6–43.5% and 47.4–48.6% in the upper side and bottom side, respectively. The flexural stress-strain curves and fracture modes of post-impacted composites were various due to the diverse damage types in different areas.

Original languageEnglish
Pages (from-to)101-106
Number of pages6
JournalVacuum
Volume144
DOIs
StatePublished - Oct 2017

Keywords

  • C/C composites
  • Failure modes
  • Hypervelocity impact
  • Residual strength

Fingerprint

Dive into the research topics of 'Hypervelocity impact behavior and residual flexural strength of C/C composites'. Together they form a unique fingerprint.

Cite this