Effect of thickness on the impact resistance of flax fibre-reinforced polymer

Abstract

Impact properties of flax fibre-reinforced polymer composites were investigated using two different impact test methods, i.e. drop-weight test and Charpy test. The drop-weight impact tests were conducted with varying drop height. For the drop-weight tests, the perforation energy and the energy absorbed by a specimen are used to study the impact response of the flax fibre-reinforced polymer composite. In a series of Charpy tests, the energy absorbed per unit width of the specimen was investigated. Impact force and Hertzian force were analysed and were found to increase with composite thickness. The ductility index decreased as the composite thickness increased. The failure of flax fibre-reinforced polymer composites started as micro-cracks, progressed to larger cracks and perforation occurred at last. However, the damage to flax fibre-reinforced polymer composites differed with the thickness of the specimens.

Lignocellulosic fiber reinforced composites: Progress, performance, properties, applications, and future perspectives

“…The ductility index decreased as the composite thickness increased. [385] Saidane et al investigating the hybridization effect on the diffusion kinetics and the tensile mechanical behavior of flax-glass fibers reinforced epoxy composites. The obtained results showed that the addition of glass fiber layers into the flax laminate clearly…”

Parameters influencing the impact response of fiber-reinforced polymer matrix composite materials: A critical review

“…Thick composites are less vulnerable to impact damages than thin composites. Wang et al [231] investigated the low-velocity impact response of flax reinforced composites. They reported that contact force and Hertzian force increased and ductility index reduced as the thickness increased.…”

Enhancement of impact toughness and damage behaviour of natural fibre reinforced composites and their hybrids through novel improvement techniques: A critical review

“…The predominant failures were determined during the impact event, mainly by the composite laminate thickness [172]. Therefore by considering thickness in NFPC composites, Wang et al [173], noticed that impact force and the Hertzian force of flax -fibre reinforced polymer was found to increase with increasing thickness. Whereas the ductility index decreases with increased composite thickness.…”