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Mechanically Activated Transition from Linear Viscoelasticity to Yielding: Correlation-Based Unification.
Maxim S Arzhakov1, Irina G Panova1, Aleksandr A Kiushov1
1Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia.
Polymers
|October 16, 2025
Summary
The mechanically activated transition (MAT) in ductile materials is unified using master curves. This approach reveals consistent yielding criteria across diverse materials like plastics, foams, and pastes.
Area of Science:
- Materials Science
- Rheology
- Solid Mechanics
Background:
- The mechanically activated transition (MAT) is crucial for ductile material behavior, bridging linear viscoelasticity and yielding.
- This transition is defined by the proportional limit (E0, ε0) and yield point (Ey, εy), influencing macroscopic material properties.
Purpose of the Study:
- To establish quantitative correlations for MAT parameters in bulk plastics and polymeric foams.
- To develop a unified framework for describing the mechanical response within the MAT region across different material classes.
Main Methods:
- Determination of quantitative correlations between E0, ε0, Ey, and εy.
- Construction of a master curve by recalculating stress-strain data into reduced coordinates.
- Generalization of findings by incorporating data on soil-based pastes and computer simulations of plastic deformation.
Main Results:
- Identified yielding criteria: E0/Ey = 1.55 ± 0.15 and εy/ε0 = 2.1 ± 0.2.
- Demonstrated successful unification of mechanical response within the MAT region using master curves for plastics, foams, pastes, and virtual models.
- Proposed an algorithm for rapid analysis of mechanical responses in plastic systems within the MAT region.
Conclusions:
- The mechanical response within the MAT region can be unified across diverse materials, including polymers, foams, and pastes.
- The master curve approach provides a generalized method for understanding and predicting material behavior during the transition to yielding.
- The proposed methodology offers advances in analyzing plastic systems, with outlined limitations and future potential.
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