Quiz: Section 4.3 Stress-Strain Relationships for a Laminate

1. Matrix [A*] is known as the

2. The coupling matrix [B] is zero for

3. A typical graphite epoxy lamina with 70% FVF of 0.005 inch thickness and 1 inch width will fail at about an extensional load applied in direction of fibers

4. The following assumptions relate to the classical lamination theory except

5. (A) (B) and (D) are called

6. The [B] matrix for an asymmetric laminate is

7. The extensional stiffness matrix [A] for a laminate will not change if

8. Under an axial load on a [20/30/30/20] laminate, the global strains vary linearly (choose all that apply).

9. For a symmetric [34/65/65/34] Graphite/epoxy laminate, the following is true under a uniaxial load applied in the global x-direction

10. For a symmetric [34/65/65/34] Graphite/epoxy laminate, the following is true under a twisting load applied on the face perpendicular to the x-axis.

11. Under an axial load on a [20/30/30/20] laminate, the global stresses vary linearly

12. In addition to the thickness of the laminate, the in-plane elastic moduli of a symmetric laminate are found by knowing which of the following matrices?