Physics Yield Strength

Physics Yield Strength

Write a short note on yield strength and its significance.
Answer:

Yield strength is defined as the stress at which a material exhibits a specified limiting deviation from the proportionality of stress to strain.

• Yield strength is determined by selecting the desired offset (S) and drawing a line parallel to the linear region of the stress-strain curve. The point on the stress-strain curve where the offset meets is the yield strength (Point X).
  • Offet is the arbitrary value put for the material.
  • Yield strength is expressed in MPa.

Significance of yield strength: Yield strength determines the percent of total permanent deformation which is acceptable for the material. In dentistry, 0.1% and 0.2% offer are most commonly used.