Yield (engineering)

The yield point - also known as yield strength - is in rheology ( the science of deformation and flow behavior of materials ) that applied borderline force, from which a substance changes from the " elastic Gedehntwerden " to "flow" ( ie of a non- permanent to permanent deformation) passes.

Possible cases

Yield point is the collective term for that voltage from employing a plastic ( permanent ) deformation. Whether it is a

  • A tensile stress, then one speaks of yield strength,
  • A compressive stress, we spoke earlier of compressive yield stress,
  • Bend, then one speaks of yield strength,
  • Twist we speak of Torsionsgrenze.

Explanation

Up to a certain load - the yield point - remains a material elastic and resumes its original shape when you re taking the burden of him. If the stressful tension on the material but larger, it seems to deform consistently begins. Finally, it breaks or tears off. In general, the load must be only at the beginning exceed the yield point, then often sufficient to lower the load to continue the deformation. The exact course describes the stress-strain diagram.

  • Material property
  • Rheology
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