Which material class has the lowest specific stiffness?Answer 1 Question 10Which material class has the highest specific stiffness?

Material Classes and Specific Stiffness

1. Lowest Specific Stiffness: The material class with the lowest specific stiffness is typically polymeric materials. This is due to their low modulus of elasticity and relatively lighter weight compared to other materials like metals or ceramics. Polymeric materials do not provide much resistance against deformation compared to their mass, leading to lower stiffness values.

2. Highest Specific Stiffness: The material class with the highest specific stiffness is composite materials, particularly those that incorporate carbon fibers. These composites exhibit both high strength and a high modulus of elasticity, allowing for superior performance relative to their weight. This makes them ideal for applications like aerospace where lightweight and high strength are critical.

Summary

In summary, when comparing material classes:

• Lowest Specific Stiffness: Polymeric materials
• Highest Specific Stiffness: Composite materials (notably those with carbon fibers)