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3. Mathematical descriptions
3.1 Different formulas
The three main mathematical formulae used to represent relaxation curves, σ = f (t), are given in Table 1 .
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Mathematical descriptions
Mathematical descriptions
Relaxation-fluid extrapolation method. Creep-relaxation comparison
References
Standardization
American society for testing and materials (ASTM)
- Test Methods for Stress Relaxation for materials and Structures - ASTM E328 - 2002
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