What is Elastic?
If a material is elastic, it has the ability to return to its original shape and size after the deforming force is removed.
Definition
Purpose
Elastic materials are used in cases where repeated stress, pressure, or movement must be accommodated without permanent damage or deformation. This is especially important in both construction and general use, where materials need to recover after being loaded.
Examples of Use
- Rubber Bands: Rubber bands stretch when pulled and snap back to their original state once released.
- Construction Seals: Elastomeric seals and gaskets help manage pressure changes in joints and connections while ensuring a tight seal.
- Textile Applications: In clothing, stretch fabrics expand with the body's movement and return to their original fit for maximum comfort.
Related Terms
Notes
- The level of elasticity differs considerably across materials and must be matched to the demands of each application.
- When a material is stretched beyond its elastic limit, it no longer recovers fully. This permanent change is referred to as plasticity.
- Elastic materials can also store elastic potential energy temporarily as they are stretched or compressed, which is released once they come back to their original shape.
- Elastic properties are particularly valued in seals, gaskets, and shock-absorbing components.
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