There isn't a specific universal formula for the elastic limit, as it depends on the material and the type of stress applied. In general terms, the elastic limit is expressed in stress (force per unit area) and is often denoted by the symbol σel.
σel=Original cross-sectional area/Maximum stress before deformation
Real Life Examples
Rubber Bands:
- Stretch within the elastic limit and return to original shape when released.
- Exceeding the limit may cause permanent deformation.
Metal Springs:
- Deform under force, returning to original shape within the elastic limit.
- Beyond the limit, permanent deformation or failure may occur.
Elastic Materials in Clothing:
- Fabrics like spandex stretch within limits for comfort.
- Exceeding the limit may result in permanent deformation.
Bungee Jumping Cord:
- Engineered to stretch within the elastic limit for controlled rebound.
- Staying within the limit ensures the cord returns to its original length.