An Optimized Approach to Multistage Permanent Deformation Testing of Granular Materials
Erdrick Pérez-González1, Jean-Pascal Bilodeau1
1Department of Civil and Water Engineering, Université Laval, Québec, QC G1V 0A6, Canada.
Materials (Basel, Switzerland)
|July 27, 2024
Summary
This study presents a faster method to predict permanent deformation in granular materials under cyclic loading. It uses plastic strain rate variation to reduce required load cycles for pavement design.
Area of Science:
- Geotechnical Engineering
- Materials Science
- Civil Engineering
Background:
- Permanent deformation in granular materials is critical for pavement design.
- Cyclic loading causes material degradation over time.
- Accurate characterization is essential for pavement longevity.
Purpose of the Study:
- To introduce an alternative, time-efficient approach for characterizing permanent deformation.
- To reduce the number of load cycle repetitions required for analysis.
- To correlate short-term and long-term plastic strain accumulation.
Main Methods:
- Utilizing an analytical strategy based on plastic strain rate variation over time.
- Employing a cycle-hardening approach.
- Establishing correlations between post-compaction and shakedown state plastic strain.
Main Results:
- The proposed method accelerates the characterization of permanent deformation.
- It provides an efficient means to assess material behavior under cyclic loading.
- The approach ensures integrity and validity while optimizing time and resources.
Conclusions:
- The alternative approach significantly enhances the efficiency of permanent deformation characterization.
- This method offers a resource-optimized solution for pavement design.
- It enables faster and more reliable assessment of granular material behavior.
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