Quiz: Section 1.1 Introduction

1. The area of the fiber-matrix interface for a fixed volume of fibers in a composite is inversely proportional to the d^p, where  is the diameter of the fiber. What is the value of ^p?

2. The lightest mass of the beam required to take a tensile load depends on the ratio E^a/ρ (E=Young’s modulus, ρ=density). What is the value of a?

3. A composite is structural material?  What is it defined as? (Choose most appropriate answer)

4. What is the definition of specific modulus?

5. A steel wire will generally have __________ order of strength than the bulk steel it is made from.

6. Composites are easy to repair.

7. The lightest mass of the beam required to take a compressive load and avoid buckling depends on the ratio E^a/ρ (E=Young’s modulus, ρ=density). What is the value of a?

8. One of the major drawbacks of composites is

9. To measure normal strain experimentally by a strain gage at a point in the body, I need to know __________ of the body

10. Other than Young’s modulus, what does the flexibility of a circular rod depend on?