Which property indicates a material's ability to withstand tearing or shearing without breaking?

• A. Ductility
• B. Toughness
• C. Brittleness
• D. Conductivity

Answer: (B)

The property of a material that indicates its ability to withstand tearing or shearing without breaking is toughness. Toughness is a measure of how much energy a material can absorb before failing. It encompasses both strength and ductility, allowing materials to undergo some degree of deformation under stress without fracturing. This characteristic is particularly important in aviation structures, where materials often face dynamic and varying loads.

Ductility, while related, specifically refers to the degree to which a material can be stretched or deformed without breaking, focusing more on elongation rather than resistance to tearing or shearing. Brittleness describes materials that fracture easily under stress, lacking the ability to deform without breaking. Conductivity relates to a material's ability to conduct electricity or heat, which is not relevant to tearing or shearing resistance. Hence, toughness is the most appropriate term for describing a material's resistance to these types of forces.