Low-velocity impact responses and failure mechanisms of CFRP after fire exposure

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

6 Scopus Citations
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Author(s)

  • Zuxiang Lei
  • Chunyu Cheng
  • Binbin Yin
  • Lihong Tong
  • Yun Wan

Detail(s)

Original languageEnglish
Article number101277
Journal / PublicationComposites Communications
Volume34
Online published11 Aug 2022
Publication statusPublished - Oct 2022

Abstract

Damage to composite laminates in a fire will significantly affect their structural integrity and post-fire performance. Here, we investigate the low-velocity impact (LVI) responses and failure mechanisms of CFRP with normal and flame-retardant epoxy resin after exposure to fire. When exposed to fire, the cases with normal resin lose more mass than those with flame retardant. Especially at 600 °C and 800 °C, the mass loss increases sharply, resulting in the visibility of fibers on the surface. Then LVI tests are conducted to evaluate the effects of the post-fire on the impact resistance. According to the experimental results, the specimens with normal resin have better impact resistance. When burning on both types of specimens, a higher ultimate contact force is observed later in the force-time curves. As a result of fire, the stiffness of the laminates degraded, changing their energy absorption mechanism. Nevertheless, when the temperature reaches 800 °C, more interfacial delamination and a new shear failure mode are observed in both types of specimens. Besides, the specimens with flame-retardant epoxy resin show excellent performance on the LVI testing after flaming of 800 °C.

Research Area(s)

  • CFRP, Failure mechanism, Fire exposure, Low-velocity impact

Citation Format(s)

Low-velocity impact responses and failure mechanisms of CFRP after fire exposure. / Lei, Zuxiang; Cheng, Chunyu; Yin, Binbin et al.
In: Composites Communications, Vol. 34, 101277, 10.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review