You are to select the material for a light weight structural

You are to select the material for a light weight structural support for the tubes in the super heater section of a steam generator. The structural support is a 20 m long horizontal beam that supports a vertical distributed load of 50 kg/m. The environment to which the beam is exposed consists of air and combustion products at 500?C. The structural support is simply supported at each end. The maximum vertical deflection of the beam cannot exceed 10 mm. For the purpose of this problem, the weight of the beam, corrosion, and oxidation do not need to be considered.

A) Which of the following materials can be used to fabricate the structural support? See the table of materials below.

B) Which of the following materials is the best choice of material for the beam? See the table of materials below.

Derive the material indices for a light stiff beam. Which of the following materials can be used to fabricate the structural support? See the table of materials below. Which of the following materials is the best choice of materials for the beam? See the table of materials below. Assuming that minimizing cost is also an objective and that the cost penalty for each kg increase in weight is dollar 10.00/kg, which of the materials in the following table is the best choice of material for the beam.

Solution

structural steel is the best choice of material for the beam