Papers by Keyword: Fibre Reinforced Composites

Abstract: In this study, fatigue properties of unidirectional Arenga Pinnata fibre reinforced epoxy composites have been investigated under tension-tension fatigue loading. Composites were made at 25% by Arenga Pinnata fibre weight contents using hand lay-out technique. Tensile test was performed prior fatigue loading evaluation. The composites where then were cycled between 90%, 80%, 70% measured from ultimate tensile stress (UTS), with 10 Hz of frequency and stress ratio of R at 0.1. Tensile results indicated that the composites resist to deformation and this reaction denotes that the composites are a brittle material. Fatigue life of composite was improving as the cycled stress decreases. The fatigue resistance were calculated by employing analytical expression and compared with relevant fatigue data.

Abstract: The material development is aimed at utilizing a suitable Metal Alloy in combination with a most appropriate plastic material considering the achievement of desirable basic features of Smart materials like Shape Memory Effect, Flexibility, recovery time etc. In the present work shape memory composites were developed using Ni-Ti alloy as reinforcement into the epoxy matrix. To understand the recovery and the influence of the Young’s modulus of the matrix, three different combinations of epoxy and hardeners are used. This experiment has considered different combinations of Ni-Ti SMA wire spacing, Ni-Ti SMA wire orientations and Epoxy Mix proportions. The experiments are designed based on ‘Taguchi’s’ L9 orthogonal arrays. ‘Taguchi’s’ method combined with S/N ratio of analysis is used as the statistical tool for optimization of the most recommendable combination of the newly developed SMA polymer composite material. This is due to the special intention of finalizing the most advantageous product in view of physical properties, percentage shape recovery, recovery time etc.