Yield strength, or the yield point, is defined in engineering as the amount of strain that a material can undergo before moving from elastic deformation into plastic deformation. Elastic deformation is spring-like deformation, where a material will return to its original shape. The stress felt by a material given a certain strain is defined by linear relationship, with a slope defined by Young's_modulus. If too much strain is applied, the material will deform permanentely, or plastically. The yield point is often defined, due to the lack of a clear border between the elastic and plastic regions, by a .2% offset from the linear region. The point where this offset line intersects the stress-strain curve is yield point.

See also

• Tensile_strength
• Hardness
• Toughness
• Young's_modulus
• Deformation
• Stress
• Strain

External Links

• Engineering Stress-strain Curve