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Lessons Learned from Applications for Sands - Coggle Diagram
Lessons Learned from Applications for Sands
Fundamental Behavior
Nonlinear shear stress-strain response
Dilatancy, constractancy and critical state approach
Void ratio and state parameter control behavior
Model Framework
MIT-S1: Unifield model linking clays & sands
LCC -> particle crushing regime
Critical state defines limiting void ratio at failure
Fabric orientation -> yield direction; lemniscate shape function
Experimental Insights
DEM simulations & micro-CT validate
Correlation between yield surface and preconsolidation stress ratio
Localization and instability onset captured numerically
Practical Applications
Foundation load response in sands
Offshore Geotechnics -> Pile setup, cyclic degradation
Liquefaction -> Prediction of static liquefaction triggering
Dense and loose sand states
Lessons learned
Critical-state-based modeling imporves reliability
Particle breakage dominates compressibility at high stress
Unified approach improves transition between soil types
Validation through centrifuge and large-scale tests
Model Strengths
Robust calibration through measurable LCC
Stress-path dependent but rate-insensitive response
Predicts instability envelopes and strain localization