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## Stress relaxation
## Additional recommended knowledgeViscoelastic materials have the properties of both viscous and elastic materials and can be modeled by combining elements that represent these characteristics. One viscoelastic model, called the Maxwell model predicts behavior akin to a spring (elastic element) being in series with a dashpot (viscous element), while the Voigt model places these elements in parallel. Although the Maxwell model is good at predicting stress relaxation, it is fairly poor at predicting creep. On the other hand, the Voigt model is good at predicting creep but rather poor at predicting stress relaxation. The most accurate of the viscoelastic models is the Standard Linear Solid model, which combines the characteristics of both the Maxwell and Voigt models to display both creep and stress relaxation (See Viscoelasticity). The following image shows the response of a Standard Linear Solid material to a constant stress, σ
To generalize, Obukhov uses power dependencies: where σ
where α is a material constant and b and
- Magnitude of initial loading
- Speed of loading
- Temperature (isothermal vs non-isothermal conditions)
- Loading medium
- Friction and wear
- Long-term storage
## See also## References |

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Stress_relaxation". A list of authors is available in Wikipedia. |