出典:Wiktionary
From Middle English toughnesse, towghnesse, towghenesse, equivalent to tough + -ness.
toughness (countable かつ uncountable, 複数形 toughnesses)
出典:Wikipedia
出典:『Wikipedia』 (2011/08/02 22:00 UTC 版)
In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing; Material toughness is defined as the amount of energy per volume that a material can absorb before rupturing. It is also defined as the resistance to fracture of a material when stressed.