Materials for Civil and Construction Engineers (4th Edition)
Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 4, Problem 4.1QP

Name the two primary factors that make aluminum an attractive structural engineering material.

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Two primary factors that make aluminum an attractive structural engineering material.

Explanation of Solution

List the two primary factors that make aluminum an attractive structural engineering material:

  • Ability to resist corrosion
  • High strength-to-weight ratio

Ability to resist corrosion:

Aluminum has a good resistance to corrosion. It produces a thin oxide film that establishes and protects the metal from oxidation. Aluminum is highly resistant to weathering. It is corrosion resistant to be attacked by some other acids. The high strength alloys are less resistant to corrosion. The alloys can be secured by various surface treatments or by cladding exposed surface with a thin coating of an aluminum alloy.

High strength-to-weight ratio:

It is also called as specific weight. The unit for specific weight is Nm/kg. That is, the material’s strength is divided by its density.

  • The tensile strength of pure aluminum is roughly 90MPa and improved to 180MPa by cold working. The heat treatable grades can improve a tensile strength of around 570MPa. Aluminum alloys increase in strength without ductility and brittle failures at sub zero temperatures.
  • The aluminum has a density of 2.7×103kg/m3, which is 35% that of the steel.

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