Which property represents the total energy a material can absorb before rupture?

Which property represents the total energy a material can absorb before rupture?

• A. Elasticity
• B. Toughness
• C. Ductility
• D. Hardness

Answer: (B)

This item is about how much energy a material can absorb before it breaks. Toughness is the property that quantifies that total energy absorption, expressed as energy per volume up to the point of rupture. It basically measures how much plastic and elastic work the material can do before failing, which is why it corresponds to the area under the stress–strain curve up to fracture. A material with high toughness can absorb a lot of energy through both elastic deformation and plastic deformation, and then resist crack initiation and propagation. Elasticity, by contrast, deals with reversible deformation and the energy stored and returned when the load is removed; it does not account for the energy absorbed during permanent, plastic deformation or fracture. Ductility describes how much plastic deformation a material can undergo before breaking, but it doesn’t directly measure the total energy involved in failure. Hardness indicates resistance to surface indentation or local plastic deformation, not the energy needed to rupture the entire specimen. So, toughness best represents the total energy a material can absorb before rupture.

This item is about how much energy a material can absorb before it breaks. Toughness is the property that quantifies that total energy absorption, expressed as energy per volume up to the point of rupture. It basically measures how much plastic and elastic work the material can do before failing, which is why it corresponds to the area under the stress–strain curve up to fracture. A material with high toughness can absorb a lot of energy through both elastic deformation and plastic deformation, and then resist crack initiation and propagation.

Elasticity, by contrast, deals with reversible deformation and the energy stored and returned when the load is removed; it does not account for the energy absorbed during permanent, plastic deformation or fracture. Ductility describes how much plastic deformation a material can undergo before breaking, but it doesn’t directly measure the total energy involved in failure. Hardness indicates resistance to surface indentation or local plastic deformation, not the energy needed to rupture the entire specimen.

So, toughness best represents the total energy a material can absorb before rupture.