Estimate parameters from modulus, viscosity, time, and strain. Plot relaxation curves and export result summaries. Use responsive inputs for fast practical viscoelastic property evaluation.
Enter any two among modulus, viscosity, and relaxation time. The calculator solves the missing parameter, then evaluates stress relaxation and creep when optional loading inputs are available.
The graph shows the Maxwell relaxation modulus curve. If you enter initial strain, the stress relaxation curve is added. If you enter applied stress, the creep strain curve appears on the secondary axis.
| Case | Elastic Modulus (MPa) | Viscosity (MPa·s) | Relaxation Time (s) | Initial Strain | Applied Stress (MPa) | Time (s) | Stress Under Constant Strain (MPa) | Total Creep Strain |
|---|---|---|---|---|---|---|---|---|
| Polymer Sample A | 120 | 7200 | 60 | 0.020 | 3 | 30 | 1.4557 | 0.0375 |
| Polymer Sample B | 80 | 4000 | 50 | 0.015 | 2 | 10 | 0.9825 | 0.0300 |
| Polymer Sample C | 200 | 24000 | 120 | 0.010 | 5 | 60 | 1.2131 | 0.0375 |
The Maxwell model combines one spring and one dashpot in series. It is widely used for linear viscoelastic stress relaxation and creep estimation.
τ = η / EE = η / τη = E × τE(t) = E × exp(-t / τ)σ(t) = E × ε₀ × exp(-t / τ)ε(t) = σ₀ / E + (σ₀ / η) × t
Here, E is elastic modulus, η is viscosity, τ is relaxation time, ε₀ is initial strain, σ₀ is applied stress, and t is time.
The Maxwell model represents a material with an elastic spring and a viscous dashpot connected in series. This arrangement captures immediate elastic response together with time-dependent flow. The model is especially useful when stress decreases after a sudden strain or when strain grows under steady loading.
In practical physics and material analysis, modulus controls the elastic part, viscosity controls the flow part, and relaxation time defines how quickly the material loses stored stress. These outputs help compare polymers, gels, coatings, biomaterials, and other viscoelastic systems under ideal linear conditions.
It describes linear viscoelastic behavior using one elastic spring and one viscous dashpot in series. The model is useful for stress relaxation and steady creep estimation.
Any two among elastic modulus, viscosity, and relaxation time are enough. The third value follows directly from the relation τ = η / E.
Relaxation time measures how fast stress decays after a sudden strain. Larger values mean slower relaxation and longer stress retention.
Initial strain is needed for the stress relaxation equation. Without it, the tool can still compute parameters and the relaxation modulus curve.
Applied stress lets the calculator estimate creep strain over time. It separates the immediate elastic strain from the time-driven viscous strain contribution.
Yes. The calculator converts common modulus, viscosity, stress, and time units internally before solving and then reports values in your selected display units.
No. It is a simplified linear model. Many real materials need generalized Maxwell models, Kelvin models, or nonlinear constitutive equations for higher accuracy.
The graph shows how modulus or stress decays and how creep strain grows. This makes time-dependent behavior easier to interpret than using one result value alone.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.