Yield strength意思

"Yield strength" is a term used in materials science and engineering to describe the stress at which a material begins to deform plastically. It is also known as "proof stress" or "ultimate tensile strength." The yield strength is an important property of a material because it indicates the maximum stress that the material can withstand without permanent deformation.

When a material is subjected to stress, it will first deform elastically, meaning that it will return to its original shape when the stress is removed. However, if the stress exceeds the yield strength, the material will begin to deform plastically, meaning that the deformation will be permanent. This is known as the "yield point" or "yield stress."

The yield strength of a material can vary depending on factors such as the material's composition, the manufacturing process, and the temperature and environment in which the material is used. It is typically measured in units of pressure, such as pounds per square inch (psi) or megapascals (MPa).

The yield strength is an important consideration in the design of structures and machines, as it helps engineers to select materials that are strong enough to withstand the stresses and strains that they will be subjected to in use.