Post on 15-Apr-2017
Presenter
Murali Krishna Eragani
Senior Under Graduate Student
Dept. of Mechanical Engineering
JNTUH College of Engg. Hyderabad
COMPOSITE MATERIALS
Outline of the Presentation
What are Composites?
Classification of Composites
Why Composites?
Applications of Composites
Case Study on Composites
Strength Analysis
References
What are Composites?
Two or more chemically distinct materials which when combined have
improved properties over the individual materials
Constituent Materials
Matrix surrounds and supports the reinforcement materials by
maintaining their relative positions
Reinforcements impart special physical and mechanical properties to
enhance the matrix properties
Classification of Composites
Particle – Reinforced Composites
Concrete:
Coarse rock or gravel is embedded in a
matrix of cement
Gravels provides stiffness and strength while
cement acts as the binder to hold the structure
together
Fiber – Reinforced Composites
Wood – Cellulose fibers in lignin and hemicellulose matrix
Carbon Fiber Reinforced Plastic (CFRP)
Glass Fiber Reinforced Plastic (GFRP)
Reinforcement: fibers
Glass
Carbon
Boron
Matrix materials
Polymers
Metals
Ceramics
CFRP
GFRP
Structural Composites
Sandwich Panels Low density, honeycomb core
Benefit: light weight, large bending stiffness
Stacked and Bonded Fiber – Reinforced Sheets Stacking sequence: e.g., 0º/90º or 0/45/90º
Benefit: balanced, in-plane stiffness
Why Composites?
Excellent Strength – to Weight Ratio
Superior Mechanical Properties
Reduced Weight of the Final Components
Resistance to Fatigue
Resistance to Corossion
Design Flexibility
Lower Investment in Setting Up of Composites Manufacturing
Industry
Applications of Composites
Strength – Weight Graph for Various Materials
Carbon Fiber Aluminium 304 Stainless Steel Glass Fiber
Strength
Weight
Case Study on Composites
Case Study on Composites (Contd.)
20% more fuel efficiency and 35,000 lbs. lighter
Composites in the First Smart Phone of India
Xiaomi India CEO Manu Jain with Andhra Pradesh CM Chandrababu Naidu at Redmi 2 Prime launch Xiaomi Redmi 2 Prime
The Protective Casing of India’s First Manufactured Smart Phone, Xiaomi Redmi 2 Prime is made
of Carbon Fiber
Strength Analysis of Composites
Stiffness Matrix
Anisotopic Mechanical Properties
FEA of Aircraft Wing
References
[1] Composite Materials – Callister
[2] Hexcel Corporation –Aerostrategy
[3]The Boeing Company and Airbus
[4] Composite Materials – NPTEL
[5] Engineering Comosite Materials – Brayn Harris, Institute of Materials,
London
[6] Indian Express –The English Daily
THANK YOU