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Fracture and impact characterization of novel auxetic Kevlar®/Epoxy laminated composites
- Source :
- Composite Structures. 168:120-129
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Experimental study was performed to investigate fracture and impact properties of novel Auxetic Kevlar® laminated composites. For comparison, standard Kevlar® woven composites with and without polyurethane treatment were also considered in this study. For these three composites, short nylon fibers of two different fiber lengths and three different fiber densities were flocked between laminates. Vacuum infusion process along with optimized compaction was employed to fabricate composites. The double cantilever beam configuration was used to investigate the fracture properties. The Auxetic Kevlar® composites showed a significant improvement of 225% in fracture toughness compared to regular woven Kevlar® composites. Furthermore, the initiation toughness was increased by 577% with the application of flocking in Auxetic Kevlar®. During impact testing, the Auxetic Kevlar® reinforced composites showed a significant reduction in damaged area compared to woven counterpart. On the other hand, the reduction in damaged area influenced the reduction in impact energy absorption.
- Subjects :
- Toughness
Materials science
Auxetics
Compaction
Fracture mechanics
02 engineering and technology
Kevlar
Epoxy
021001 nanoscience & nanotechnology
chemistry.chemical_compound
020303 mechanical engineering & transports
Fracture toughness
0203 mechanical engineering
chemistry
visual_art
Ceramics and Composites
visual_art.visual_art_medium
Composite material
0210 nano-technology
Civil and Structural Engineering
Polyurethane
Subjects
Details
- ISSN :
- 02638223
- Volume :
- 168
- Database :
- OpenAIRE
- Journal :
- Composite Structures
- Accession number :
- edsair.doi...........f56bb5209928d16f4aed9c7ba6f9746f