Investigation on testing and analysis of polypropylene fibre under tensile

An extensively used thermoplastic polymer is polypropylene (PP). Premature failure of
polymers and polymer composites is caused by the development of cracks and microcracks
during the course of their lifetime. A material failure caused by the development of cracks
and microcracks could be disastrous. To ensure the performance reliability, cost-effectiveness,
and safety of polymer constructions, cracks and microcracks must be found and effectively
repaired. This article examines the most recent methods for detection and observation and
focuses on the beginning and growth of cracks in polypropylene structures. Due to its weak
fracture behaviour, its usage as an engineering thermoplastic is somewhat constrained.
Among scientists, there is still disagreement over the failure mechanism. This is because
polypropylene fractures are complicated. Through the use of three-point bending tests, the
fracture mechanism of polypropylene has been investigated in this work. The outcome of a
three-point bending test reveals the presence of a large damage zone in front of the notch. Due
to the significant plastic zone that is present in the area around the fracture tip, the
elastoplastic fracture mechanics technique will be used.