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* In addition, when the stress is independent of this strain rate, the material exhibits plastic deformation.<ref name="Meyers" /> Many viscoelastic materials exhibit [[rubber]] like behavior explained by the thermodynamic theory of polymer elasticity.
Some examples of viscoelastic materials are amorphous polymers, semicrystalline polymers, biopolymers, metals at very high temperatures, and bitumen materials. Cracking occurs when the strain is applied quickly and outside of the elastic limit. [[Ligament]]s and [[tendon]]s in the human body are viscoelastic, so the extent of the potential damage to them depends on both the rate of the change of their length and the force applied.{{Citation needed|reason=maybe https://doi.org/10.1114/1.1408926| date=February 2017}}
A viscoelastic material has the following properties:
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