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Quasi-static and high strain rate response of Kevlar reinforced thermoplastics
- Source :
- Polymer Testing, Vol 93, Iss , Pp 106964- (2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- The present study deals with the quasi-static and high strain rate characterization of Kevlar-129 based thermoplastic composites. Two different thermoplastic matrices, namely, Polypropylene (PP) and Polyetherimide (PEI) were used to manufacture composite laminates. Quasi-static compression tests were performed at strain rates of 0.041 s−1 and 0.045 s−1. High strain rate tests were performed using a split Hopkinson pressure bar apparatus within the strain rates ranging from 2548 s−1 to 4379 s−1. Stress-strain relations reveals the rate-sensitive behaviour of composites. Kevlar/PP (K-PP) showed higher peak stress under quasi-static loading as compared to the high strain rate test. Comparable peak stresses were revealed under quasi-static and high strain rate loading for Kevlar/PEI (K-PEI) composite. Also, high strain rate compression properties such as peak stress, peak strain and toughness of K-PP were 25%, 27% and 6% higher than that of the K-PEI composite. The failure mechanisms of both the composites were characterized through macroscopic and scanning electron microscopy. K-PP failed majorly due to matrix crush and fibre failure while K-PEI failed due to shear cracking. Damage study reveals that a single fibre based composite system can be tailored to act as an energy-absorbing or dissipating material system by varying the thermoplastic matrix materials.
Details
- Language :
- English
- ISSN :
- 01429418
- Volume :
- 93
- Issue :
- 106964-
- Database :
- Directory of Open Access Journals
- Journal :
- Polymer Testing
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.4263441a5ca74c25aa45725085892987
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.polymertesting.2020.106964