Transverse impact by RCCs on S-glass and Kevlar® FRC strips

Jinling Gao, Zherui Guo., Julio Andres Hernandez, Fengfeng Zhou, Yizhou Nie, Jian Gao, Boon Him Lim, Nesredin Kedir, Xuedong Zhai, Junyu Wang, Jung Ting Tsai, Francesco De Carlo, Pavel D. Shevchenko, Tyler N. Tallman, Martin Byung-Guk Jun, Giuseppe R. Palmese, Weinong Chen

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

This study aims to isolate interactions between plies and tows and reveal fundamental physics involved in transverse impact on fiber-reinforced composite (FRC) structures. Composite strips were sectioned from large panels and characterized by optical photography, three-dimensional synchrotron X-ray computed tomography, and scanning electron microscopy (SEM). Each strip was impacted perpendicularly by a right circular cylinder (RCC) projectile at a velocity ranging from ~ 150 to 600 m/s. The global strip behavior, as well as localized deformation and failure of the strip near the projectile corner, were both captured by high-speed optical imaging. S-Glass FRC strips were observed to fail in tension ahead of the RCC projectiles’ flat surfaces while Kevlar® FRC strips fractured at the projectile corners. The concept of critical velocity region previously used for impact on yarns was introduced to define different failure modes of each composite strip type. The strip damage extent was found to increase with the impact velocity and reach the maximum at the upper limit of the critical velocity region. Above the critical velocity region, the damage extent decreased with impact velocity. Wave propagations and load histories in the composite strips during impact were quantified and compared with Smith's theory. Finally, critical velocities of single fibers, yarns, and composite strips and ballistic limits of single-ply and multi-ply composite panels were compared to provide insight into the design of impact-resistant fabrics and composites.

Original languageEnglish (US)
Article number106425
JournalComposites - Part A: Applied Science and Manufacturing
Volume146
DOIs
StatePublished - Jul 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials

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