Question

Based on stiffness criteria, the material cost can be optimized by reducing the.

Vc/E1/3

E1/3/Vc

E/Vc

σ1/3limit/Vc​

Answer 1

Option ii is correct

E1/3/Vc

Explanation:

• The cost of the material is reduced by reducing the weight per unit volume in any structure.
• If we need to minimize the cost,  the selection criteria for maximum thickness and strength are E1/3/Vc
• Here Vc is per unit volume and is equal to = density x cost per unit weight