Authors: Athale Pranjal Sudhir, Prof. U. K. Joshi
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Leafspring is one of the oldest and most effective suspension systems. Today it can be seen used in all heavy commercial vehicles the leaf spring used conventionally was made up of plain carbon steel, silicon manganese steel etc. but as steel is heavy it increases the overall weight of vehicles and decreases its performance, but nowadays after the advent of composites many researchers are trying to replace conventional leafspring with new composite leafsprings which are light in weight. In our project we are trying to compare and analyse two such composite material made up of bamboo fiber reinforced with s-glassfiber and bamboo fiber reinforced with e-glass fiber using epoxy resin matrix with conventional leafspring.
The origin of leaf spring can be traced back to year 1804 when Obdiah Elliot used it as a suspension system in horse drawn cart.
Even today it is one of the most successful system as they can be seen in almost all heavy vehicle, but one disadvantage it carries is that these leaf spring are made conventionally from plain carbon steel or other varities of steel which increases vehicles overall weight hence compromises the performance of vehicle. As the world is heading toward new high efficiency light weight automobiles replacement of conventional leafsprings with new light weight but highly efficient composite materials such as fiber reinforced plastics seems to be possible. Fiber reinforced plastic is a composite material made up of a polymer matrix reinforced with fibers, the fibers can be natural fiber or artificial fibers , also if we use glass fiber to reinforce natural fibers it is called as Glass fiber reinforced plastics or GFRP materials . Leafsprings are designed using bending beam equations , High fatigue resistance is one the most desired properties of leafspring, since they carry the entire load of vehicle and experience dynamic load under various driving conditions
The objective of project is to make two separate leaf of leafspring of two composite material i.e bamboo-s glass fiber and bamboo-e glass fiber and then compare and analyse different properties with respect to single conventional stemel leaf of a leafspring.
The method used for manufacturing composites will be manual layup method, here bamboo fibers will be treated with 1perc.NAOH solution for 12 hrs. and then dried in sun, Then in a die fibers will be placed in die and reinforced with glass fiber then epoxy resin will be applied which will be kept for 24 hrs. After that various tests such as tensile test, hardness test etc. will be conducted and comparative analysis with conventional leafspring will be performed and results will be shown in form of graphs.
IV. LITERATURE REVIEW
Various studies are being carried out in order to replace conventional leafsprings with polymer composites using aramid fibers , bamboo fibers , glass fibers , carbon fibers and other textile fiber etc. .It can be seen in study conducted by sudhakarbehera et al  tensile strength of bamboo fibers increase when treated with alkali solution .hence using alkali treated bamboo fibers reinforced with s-glass and e-glass might make an effective composite material .so my objective is to make a comparative analysis between these GFRP material and conventional leaf spring.
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Copyright © 2022 Athale Pranjal Sudhir, Prof. U. K. Joshi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.