An innovative test equipment with rate-dependence in interface damage and its operation under cyclic loading

Area of Science:

• Geotechnical Engineering
• Materials Science

Background:

• Geosynthetic materials are crucial in civil engineering applications.
• Understanding their behavior under dynamic loading is essential for structural integrity.
• Existing methods may not fully capture interface damage under cyclic stress.

Purpose of the Study:

• To introduce innovative test equipment for analyzing dynamic damage at geosynthetic interfaces.
• To develop a mathematical model predicting shear mechanical behavior under cyclic loading.
• To establish a dynamic statistical model for geosynthetic interface damage.

Main Methods:

• Utilizing novel test equipment to obtain experimental data of geosynthetics under cyclic loading.
• Proposing a mathematical identification method based on the Mohr-Coulomb criterion and Weibull distribution for micro-element strength.
• Incorporating repeated loading-unloading conditions into the model to simulate reoccurring load cycles.

Main Results:

• The developed test instrument accurately measures direct shear parameters of geosynthetics under dynamic load.
• The proposed mathematical model demonstrates satisfying performance in predicting shear stress behavior.
• A new dynamic statistical model with rate-dependence in interface damage was established.

Conclusions:

• The innovative test equipment and proposed mathematical model effectively analyze dynamic damage in geosynthetic interfaces.
• The study provides a robust method for predicting geosynthetic mechanical behavior under various cyclic loadings.
• The findings contribute to enhanced design and safety of structures utilizing geosynthetic materials.