A criterion is required for selecting a material with the lowest cost in a strength-limited design for a cylindrical tie rod. Write the objective statement. Derive the criterion and identify the material index. The length of the tie rod, L, is fixed.

Answer is given below

Explanation:

for the function of cylindrical tie rod, constraints is the strength specified with minimum weight.

these elements are important for design structural elements

and objetive is to minimize mass

and function is  tie rad

and the equation will  be

mass = Area × Length × density

so constraints length must be specified and material is adequate fracture toughness.

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