There are two aspects in this study: cylinder penetrations and XBP (ExpendableBottom Penetrometer) interpretations. The cylinder studies firstly investigate therelationship between the soil resisting force and penetration depth by a series of rateindependentfinite element analyses of pre-embedded penetration depths, and validatethe results by upper and lower bound solutions from classical plasticity theory.Furthermore, strain rate effects are modeled by finite element simulations within aframework of rate-dependent plasticity. With all forces acting on the cylinder estimated,penetration depths are predicted from simple equations of motion for a single particle.Comparisons to experimental results show reasonable agreement between modelpredictions and measurements.The XBP studies follow the same methodology in investigating the soil shearingresistance as a function of penetration depth and velocity by finite element analyses.With the measurements of time decelerations during penetration of the XBP, sedimentshear strength profile is inferred from a single particle kinetic model. The predictionscompare favorably with experimental measurements by vane shear tests.
展开▼
