Fabrication of GFRP(composite) leaf spring
- 1. NAME: R SAINATH REDDY BRANCH: MECH ENGG COLLEGE: VGNT ROLL NO: 16895A0325
- 3. A composite material is composed of at least two materials, which combine to give properties superior to those of the individual constituents. Used for structural purposes, composite has the advantage of combining a number of properties not usually found together in a single material. In particular it combines high strength and low weight, while at the same time it is non-corrosive and has thermal and electrical insulation properties.
- 6. Stands for Glass Fibre Reinforced Polymer Glass Fabric is used as Matrix and Epoxy Resin with hardener is used as Reinforcement
- 7. LEAF SPRING • A leaf spring is a simple type of suspension spring commonly used in four wheelers. • Leaf spring is also known as flat spring made out of plates. • Leaf springs are of two types: multi-leaf and mono-leaf
- 9. COMPOSITE LEAF SPRING Composite leaf springs are not new to the automotive industries. In fact, the leaf spring itself dates back to the horse- drawn carriage. By design, leaf spring absorb vertical vibration caused by irregularities in the road. Variation in the Spring Deflection allow potential energy and then released more gradually over time. Composites are well suited for leaf – spring application due to their high Strength - to – weight ratio, fatigue resistance and natural frequency. Internal damping in the composite material leads to better vibration energy absorption within the material, resulting in reduced transmission of vibration noise to neighbouring structures. The biggest benefit is mass reduction of composite leaf spring is up to 5 times to that of steel
- 10. Advantages & Disadvantages Advantages Light weight, extremely strong Weight is ¼th for same strength Corrosion and chemical resistance Excellent elastic properties Regains shape after bending till certain limit; useful for spring application Disadvantages High cost of fabrication Complicated, time consuming Repair procedure is complex Unpredictable mechanical characterisation Compressive strength is not dependable
- 12. Conclusion Conventional leaf spring is 3.5 times heavier than the composite springs Material saving is achieved Lighter and economical for use but sensitive to heat cycle High strength retention Cost reduction and optimum fabrication process development for mass production Experimental verification to be done for bending, torsion and hardness