Composite Materials and structures

Composite Materials and structures

2 Marks Question and Answers

1 what is mean by composites?

It is fiber reinforced composite materials which consists of fibers of high strength and
modulus embedded in or bonded to a matrix with distinct Interfaces between them.

2. TYPES OF GLASS FIBER.

• E-Glass – E stands for electrical

• S-Glass – S stands for high silica content

» High thermal expansion coefficient,

» High fatigue strength

• C-Glass – C stands for Corrosion

» Used in Chemical applications

» Storage tanks

• R-Glass – R stands for Rigid

» Structural applications

• D-Glass – D stands for Dielectric

» Low dielectric constants

• A-Glass – A Stands for appearance

» To improve surface appearance

» For ornamental works

• E-CR Glass – E-CR stands for Electrical and corrosion resistance

• AR Glass – AR stands for Alkali resistance

3. POLYMERIC MATRIX.

Epoxy, Polyester, Phenolic, Acrylic, Urethane, Polyamide

,4. Properties of Composites.




5. Classification and characteristics of composites.




6.Particulate composite.




7.Homogeneous material.




8. Isotropic material.




9. Orthotropic material.




10. Macro mechanics.




11. Micromechanics.

,12. Materail utilization factor.




13. Monoclinic materials constants.




14. Anisotropic material constants.




15.Isotropic materail constants.




.

16. Orthotropic material constants.

, 17. Transversely isotropic constants.




18. Unidirectional, bidirectional and quasi-isotropic fibers.




19. Anisotropic material



20.Laminate.



21.Matrix.