Question

For a plane truss member, the length is 3 m, E = 200 GPa and area of cross section is 400 $m{m}^2$. The stiffness matrix coefficient $k_{11}$ with reference to its local axis is
_____ × ${10}^3$ N/m.

• A. 26666.67

Answer 1

The correct option is A 26666.67
$k_{11}=\frac{AE}{L}=\frac{400\times 200\times {10}^3\times {10}^3}{3000}$
= 26666.67 × ${10}^3$ N/m