From the stress-strain diagram, estimate the Young’s Modulus (E) for each material and rank them in order of stiffness.

In aeronautical applications, why is aluminum alloy often chosen over steel, despite its lower Young’s Modulus?

Discuss why titanium is used in both aerospace and civil engineering applications, particularly in high-stress environments.

Identify the yield strength and ultimate tensile strength of each material using the stress-strain diagram provided.

Explain why steel is commonly used in civil structures such as bridges and skyscrapers.

In which aerospace components might titanium alloys be preferred over aluminum and steel, and why?

Define elastic and plastic deformation, and identify the regions in the stress-strain diagram where these occur.

Compare the fracture strain of steel, aluminum, and titanium. What does this indicate about their ductility?

Why is the ability to undergo plastic deformation important for structures in civil engineering?

Explain how the differences in Young’s Modulus, yield strength, and fracture strain affect the fatigue resistance of these materials.

Compare how aluminum and steel behave under cyclic loading and impact forces, particularly in aircraft fuselages versus bridges.

Based on the stress-strain diagram, which material(s) would you recommend for the fuselage of a new high-speed aircraft and why?

If a bridge required materials resistant to corrosion and fatigue while maintaining structural integrity, which material would be the best choice and why?

Using the provided stress-strain diagram, determine which material is the most brittle and which is the most ductile.

Discuss how these material properties influence their use in either aeronautical or civil structures.