Why are Composites used in Aerospace?
[3 marks]Explain particulate and fiber reinforced composite materials.
[4 marks]Write short notes. 1. Types of fiber 2. Types of matrix
[7 marks]What is a composite material?
[3 marks]Discuss the various applications of composite materials.
[4 marks]Derive transverse modulus for unidirectional lamina.
[7 marks]Derive Volume and Weight fraction for composite.
[7 marks]What is transformation of stress and strain?
[3 marks]What are advantages of carbon fiber in Aerospace?
[4 marks]The E-glass fibers in polyester is 35% by weight. Given Density of fiber ῥf=2.50gm/ml and density of matrix ῥm=1 gm/ml Calculate fiber volume fraction Vf and density of composite ῥc for the lamina.
[7 marks]What do you mean by failure in materials? Explain the use of failure criteria.
[3 marks]What is FRP? Write characteristics and advantages of FRPs.
[4 marks]Describe the stress-strain relations for plane stress in an orthotropic material.
[7 marks]Define Lamina and laminate.
[3 marks]What is Prepeg? Explain.
[4 marks]Explain different types of thermoset polymers.
[7 marks]What are the characteristics of super alloys?
[3 marks]Discuss in detail symmetric laminates.
[4 marks]Write a note on Poisson’s ratio with reference of composite material.
[7 marks]Write down the significance of fillers and additives in composite materials in detail.
[3 marks]Compare Polyester resins with Epoxy resins.
[4 marks]Derive an expression for density of a unidirectional composite lamina in terms of densities of its constituents.
[7 marks]Define Isotropic and Anisotropic body.
[3 marks]What are the basic assumptions for analysis of laminated composites?
[4 marks]Derive Inplane Shear modulus with neat sketch.
[7 marks]