Toughness is the ability of a material to absorb energy and plastically deform without fracturing. It is also defined as the resistance to fracture of a material when stressed.
Mathematical definition
Toughness can be determined by measuring the area underneath the stress-strain curve and its energy of mechanical deformation per unit volume prior to fracture.
Unit Of Toughness
Toughness is measured in units of joules per cubic metre (J/m3) in the SI system and inch-pound-force per cubic inch (in·lbf/in3) in US customary units.
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